{"id":14129,"date":"2023-02-22T15:25:13","date_gmt":"2023-02-22T08:25:13","guid":{"rendered":"https:\/\/vrenergy.vn\/?p=14129"},"modified":"2025-11-12T12:13:06","modified_gmt":"2025-11-12T05:13:06","slug":"solar-project-construction-process","status":"publish","type":"post","link":"https:\/\/vrenergy.vn\/en\/solar-project-construction-process\/","title":{"rendered":"Solar Project Construction Process"},"content":{"rendered":"<h1 data-start=\"244\" data-end=\"332\">Solar Project Construction Process: A Detailed 6-Step Guide &amp; 2025 Technical Standards<\/h1>\n<h2 data-start=\"334\" data-end=\"388\">\ud83d\udccb Quick Summary: The solar EPC process has 6 steps<\/h2>\n<ul data-start=\"390\" data-end=\"752\">\n<li data-start=\"390\" data-end=\"432\">\n<p data-start=\"392\" data-end=\"432\"><strong data-start=\"392\" data-end=\"430\">Site Survey &amp; Analysis (1\u20132 weeks)<\/strong><\/p>\n<\/li>\n<li data-start=\"433\" data-end=\"468\">\n<p data-start=\"435\" data-end=\"468\"><strong data-start=\"435\" data-end=\"466\">Detailed Design (2\u20133 weeks)<\/strong><\/p>\n<\/li>\n<li data-start=\"469\" data-end=\"510\">\n<p data-start=\"471\" data-end=\"510\"><strong data-start=\"471\" data-end=\"508\">Equipment Procurement (3\u20134 weeks)<\/strong><\/p>\n<\/li>\n<li data-start=\"511\" data-end=\"558\">\n<p data-start=\"513\" data-end=\"558\"><strong data-start=\"513\" data-end=\"556\">Installation &amp; Construction (1\u20133 weeks)<\/strong><\/p>\n<\/li>\n<li data-start=\"559\" data-end=\"596\">\n<p data-start=\"561\" data-end=\"596\"><strong data-start=\"561\" data-end=\"594\">Testing &amp; Acceptance (1 week)<\/strong><\/p>\n<\/li>\n<li data-start=\"597\" data-end=\"752\">\n<p data-start=\"599\" data-end=\"633\"><strong data-start=\"599\" data-end=\"631\">Handover &amp; EVN Registration:<\/strong><\/p>\n<ul data-start=\"636\" data-end=\"752\">\n<li data-start=\"636\" data-end=\"670\">\n<p data-start=\"638\" data-end=\"670\">Systems <strong data-start=\"646\" data-end=\"658\">&lt;100 kW:<\/strong> 3\u20134 weeks<\/p>\n<\/li>\n<li data-start=\"673\" data-end=\"712\">\n<p data-start=\"675\" data-end=\"712\">Systems <strong data-start=\"683\" data-end=\"700\">100\u20131,000 kW:<\/strong> 6\u20138 weeks<\/p>\n<\/li>\n<li data-start=\"715\" data-end=\"752\">\n<p data-start=\"717\" data-end=\"752\">Systems <strong data-start=\"725\" data-end=\"739\">\u22651,000 kW:<\/strong> 8\u201312 weeks<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p data-start=\"754\" data-end=\"909\"><strong data-start=\"754\" data-end=\"773\">Total duration:<\/strong> 12\u201318 weeks (\u22483\u20134.5 months)<br data-start=\"801\" data-end=\"804\" \/><strong data-start=\"804\" data-end=\"821\">Average cost:<\/strong> 10\u201315 million VND\/kWp (varies by equipment, installation complexity, and project scale)<\/p>\n<hr data-start=\"911\" data-end=\"914\" \/>\n<h2 data-start=\"916\" data-end=\"962\">Overview of the Solar Construction Workflow<\/h2>\n<h3 data-start=\"964\" data-end=\"992\">What is the EPC process?<\/h3>\n<p data-start=\"994\" data-end=\"1275\"><strong data-start=\"994\" data-end=\"1040\">EPC (Engineering\u2013Procurement\u2013Construction)<\/strong> is a turnkey contracting model covering the entire cycle: engineering design, equipment procurement, and construction. In solar, the EPC contractor is responsible from initial survey through to handover of a fully commissioned system.<\/p>\n<p data-start=\"1277\" data-end=\"1484\"><strong data-start=\"1277\" data-end=\"1323\">Why choose EPC over piecemeal contracting?<\/strong> You work with one accountable party, design and construction are synchronized, technical risk is reduced, and you receive a comprehensive system-level warranty.<\/p>\n<h3 data-start=\"1486\" data-end=\"1533\">3 System Types &amp; How Their Workflows Differ<\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"1535\" data-end=\"1887\">\n<thead data-start=\"1535\" data-end=\"1594\">\n<tr data-start=\"1535\" data-end=\"1594\">\n<th data-start=\"1535\" data-end=\"1549\" data-col-size=\"sm\">System Type<\/th>\n<th data-start=\"1549\" data-end=\"1562\" data-col-size=\"sm\">Complexity<\/th>\n<th data-start=\"1562\" data-end=\"1575\" data-col-size=\"sm\">Build Time<\/th>\n<th data-start=\"1575\" data-end=\"1594\" data-col-size=\"md\">Characteristics<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"1615\" data-end=\"1887\">\n<tr data-start=\"1615\" data-end=\"1699\">\n<td data-start=\"1615\" data-end=\"1641\" data-col-size=\"sm\"><strong data-start=\"1617\" data-end=\"1640\">On-grid (grid-tied)<\/strong><\/td>\n<td data-start=\"1641\" data-end=\"1647\" data-col-size=\"sm\">Low<\/td>\n<td data-start=\"1647\" data-end=\"1659\" data-col-size=\"sm\">5\u201310 days<\/td>\n<td data-start=\"1659\" data-end=\"1699\" data-col-size=\"md\">Direct grid connection; no batteries<\/td>\n<\/tr>\n<tr data-start=\"1700\" data-end=\"1809\">\n<td data-start=\"1700\" data-end=\"1729\" data-col-size=\"sm\"><strong data-start=\"1702\" data-end=\"1728\">Off-grid (stand-alone)<\/strong><\/td>\n<td data-start=\"1729\" data-end=\"1738\" data-col-size=\"sm\">Medium<\/td>\n<td data-start=\"1738\" data-end=\"1751\" data-col-size=\"sm\">10\u201315 days<\/td>\n<td data-start=\"1751\" data-end=\"1809\" data-col-size=\"md\">Uses battery storage; suits remote\/unstable grid areas<\/td>\n<\/tr>\n<tr data-start=\"1810\" data-end=\"1887\">\n<td data-start=\"1810\" data-end=\"1823\" data-col-size=\"sm\"><strong data-start=\"1812\" data-end=\"1822\">Hybrid<\/strong><\/td>\n<td data-start=\"1823\" data-end=\"1830\" data-col-size=\"sm\">High<\/td>\n<td data-start=\"1830\" data-end=\"1843\" data-col-size=\"sm\">15\u201320 days<\/td>\n<td data-start=\"1843\" data-end=\"1887\" data-col-size=\"md\">Combines both; most flexible &amp; resilient<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<ul data-start=\"1889\" data-end=\"2213\">\n<li data-start=\"1889\" data-end=\"2028\">\n<p data-start=\"1891\" data-end=\"2028\"><strong data-start=\"1891\" data-end=\"1903\">On-grid:<\/strong> for facilities with stable utility power aiming to cut bills and export surplus to the <strong data-start=\"1991\" data-end=\"2025\">Vietnam Electricity (EVN) grid<\/strong>.<\/p>\n<\/li>\n<li data-start=\"2029\" data-end=\"2111\">\n<p data-start=\"2031\" data-end=\"2111\"><strong data-start=\"2031\" data-end=\"2044\">Off-grid:<\/strong> for sites without grid access or where grid power is unreliable.<\/p>\n<\/li>\n<li data-start=\"2112\" data-end=\"2213\">\n<p data-start=\"2114\" data-end=\"2213\"><strong data-start=\"2114\" data-end=\"2125\">Hybrid:<\/strong> ideal for facilities that need continuous power and want to maximize energy efficiency.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2215\" data-end=\"2253\">Why follow a standardized process?<\/h3>\n<p data-start=\"2255\" data-end=\"2560\">Per the Ministry of Industry and Trade, all solar systems must meet electrical safety and construction quality standards. A standard process safeguards technical quality, optimizes costs, shortens timelines, simplifies progress monitoring, and reduces legal risk when registering grid connection with EVN.<\/p>\n<hr data-start=\"2562\" data-end=\"2565\" \/>\n<h2 data-start=\"2567\" data-end=\"2634\">Step 1 \u2014 Site Survey &amp; Project Requirements Analysis (1\u20132 Weeks)<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14154\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/Solar-EPC-from-Survey-to-Handover\u2028A-Complete-6-Step-Guide-2025-1.jpg\" alt=\"\" width=\"2048\" height=\"1076\" title=\"\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/Solar-EPC-from-Survey-to-Handover\u2028A-Complete-6-Step-Guide-2025-1.jpg 2048w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/Solar-EPC-from-Survey-to-Handover\u2028A-Complete-6-Step-Guide-2025-1-768x404.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/Solar-EPC-from-Survey-to-Handover\u2028A-Complete-6-Step-Guide-2025-1-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/Solar-EPC-from-Survey-to-Handover\u2028A-Complete-6-Step-Guide-2025-1-600x315.jpg 600w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<h3 data-start=\"2636\" data-end=\"2686\">Topographic Survey &amp; Roof Condition Assessment<\/h3>\n<p data-start=\"2688\" data-end=\"2768\">A thorough survey determines project success. The technical team should perform:<\/p>\n<p data-start=\"2770\" data-end=\"2791\"><strong data-start=\"2770\" data-end=\"2791\">Survey checklist:<\/strong><\/p>\n<ul data-start=\"2792\" data-end=\"3184\">\n<li data-start=\"2792\" data-end=\"2854\">\n<p data-start=\"2794\" data-end=\"2854\">Measure usable roof area (m\u00b2) and define installable zones<\/p>\n<\/li>\n<li data-start=\"2855\" data-end=\"2919\">\n<p data-start=\"2857\" data-end=\"2919\">Verify roof load capacity (<strong data-start=\"2884\" data-end=\"2897\">\u226530 kg\/m\u00b2<\/strong> as a rule of thumb)<\/p>\n<\/li>\n<li data-start=\"2920\" data-end=\"3010\">\n<p data-start=\"2922\" data-end=\"3010\">Assess solar orientation (best: <strong data-start=\"2954\" data-end=\"2963\">South<\/strong>; acceptable: <strong data-start=\"2977\" data-end=\"2990\">Southeast<\/strong> or <strong data-start=\"2994\" data-end=\"3007\">Southwest<\/strong>)<\/p>\n<\/li>\n<li data-start=\"3011\" data-end=\"3066\">\n<p data-start=\"3013\" data-end=\"3066\">Analyze shading from trees\/buildings across the day<\/p>\n<\/li>\n<li data-start=\"3067\" data-end=\"3156\">\n<p data-start=\"3069\" data-end=\"3156\">Check roof type (metal tile, clay tile, concrete) to select the right mounting system<\/p>\n<\/li>\n<li data-start=\"3157\" data-end=\"3184\">\n<p data-start=\"3159\" data-end=\"3184\">Measure current roof tilt<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3186\" data-end=\"3431\"><strong data-start=\"3186\" data-end=\"3234\">How to confirm adequate structural capacity:<\/strong> A standard rooftop PV array (modules + racking + wind load) is ~<strong data-start=\"3299\" data-end=\"3314\">25\u201330 kg\/m\u00b2<\/strong>. For buildings over 10 years old or roofs showing weakness, obtain a structural assessment from a licensed engineer.<\/p>\n<p data-start=\"3433\" data-end=\"3464\"><strong data-start=\"3433\" data-end=\"3464\">Shading mitigation options:<\/strong><\/p>\n<ul data-start=\"3465\" data-end=\"3692\">\n<li data-start=\"3465\" data-end=\"3535\">\n<p data-start=\"3467\" data-end=\"3535\">Use <strong data-start=\"3471\" data-end=\"3485\">optimizers<\/strong> (Tigo, SolarEdge) for module-level optimization<\/p>\n<\/li>\n<li data-start=\"3536\" data-end=\"3617\">\n<p data-start=\"3538\" data-end=\"3617\">Design strings with <strong data-start=\"3558\" data-end=\"3575\">bypass diodes<\/strong> accounted for to minimize mismatch loss<\/p>\n<\/li>\n<li data-start=\"3618\" data-end=\"3692\">\n<p data-start=\"3620\" data-end=\"3692\"><strong data-start=\"3620\" data-end=\"3638\">Microinverters<\/strong> per module (highest cost, strongest shade resilience)<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3694\" data-end=\"3732\">Load Analysis (Electricity Demand)<\/h3>\n<p data-start=\"3734\" data-end=\"3770\"><strong data-start=\"3734\" data-end=\"3770\">Sizing formula (quick planning):<\/strong><\/p>\n<blockquote data-start=\"3772\" data-end=\"3867\">\n<p data-start=\"3774\" data-end=\"3867\"><strong data-start=\"3774\" data-end=\"3867\">System size (kWp) = Target monthly offset (kWh\/month) \u00f7 [Regional solar factor \u00d7 30 days]<\/strong><\/p>\n<\/blockquote>\n<p data-start=\"3869\" data-end=\"3915\">Regional solar factor (daily yield per kWp):<\/p>\n<ul data-start=\"3916\" data-end=\"4020\">\n<li data-start=\"3916\" data-end=\"3950\">\n<p data-start=\"3918\" data-end=\"3950\">North: <strong data-start=\"3925\" data-end=\"3948\">3.5\u20134.5 kWh\/kWp\/day<\/strong><\/p>\n<\/li>\n<li data-start=\"3951\" data-end=\"3987\">\n<p data-start=\"3953\" data-end=\"3987\">Central: <strong data-start=\"3962\" data-end=\"3985\">4.0\u20135.0 kWh\/kWp\/day<\/strong><\/p>\n<\/li>\n<li data-start=\"3988\" data-end=\"4020\">\n<p data-start=\"3990\" data-end=\"4020\">South: <strong data-start=\"3997\" data-end=\"4020\">4.5\u20135.5 kWh\/kWp\/day<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4022\" data-end=\"4117\">Self-consumption ratio: typically <strong data-start=\"4056\" data-end=\"4066\">60\u201380%<\/strong> (commercial\/industrial), <strong data-start=\"4092\" data-end=\"4102\">30\u201350%<\/strong> (residential).<\/p>\n<p data-start=\"4119\" data-end=\"4311\"><strong data-start=\"4119\" data-end=\"4131\">Example:<\/strong><br data-start=\"4131\" data-end=\"4134\" \/>Factory uses <strong data-start=\"4147\" data-end=\"4167\">50,000 kWh\/month<\/strong> (South).<br data-start=\"4176\" data-end=\"4179\" \/>Target offset <strong data-start=\"4193\" data-end=\"4200\">70%<\/strong> \u21d2 <strong data-start=\"4203\" data-end=\"4223\">35,000 kWh\/month<\/strong>.<br data-start=\"4224\" data-end=\"4227\" \/>Regional factor <strong data-start=\"4243\" data-end=\"4260\">5 kWh\/kWp\/day<\/strong>.<br data-start=\"4261\" data-end=\"4264\" \/>Required size: <strong data-start=\"4279\" data-end=\"4310\">35,000 \u00f7 (5 \u00d7 30) = 233 kWp<\/strong>.<\/p>\n<blockquote data-start=\"4313\" data-end=\"4431\">\n<p data-start=\"4315\" data-end=\"4431\">Note: The quick rule \u201cmonthly kWh \u00f7 100\u201d is a rough South-Vietnam heuristic only; do not replace formal engineering.<\/p>\n<\/blockquote>\n<p data-start=\"4433\" data-end=\"4580\">Collect and analyze the <strong data-start=\"4457\" data-end=\"4484\">last 12 months of bills<\/strong> to identify: peak months, seasonal trends, and main usage hours (to optimize self-consumption).<\/p>\n<h3 data-start=\"4582\" data-end=\"4624\">Financial Assessment &amp; Funding Options<\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"4626\" data-end=\"5000\">\n<thead data-start=\"4626\" data-end=\"4670\">\n<tr data-start=\"4626\" data-end=\"4670\">\n<th data-start=\"4626\" data-end=\"4635\" data-col-size=\"sm\">Option<\/th>\n<th data-start=\"4635\" data-end=\"4645\" data-col-size=\"sm\">Upfront<\/th>\n<th data-start=\"4645\" data-end=\"4655\" data-col-size=\"sm\">Payback<\/th>\n<th data-start=\"4655\" data-end=\"4662\" data-col-size=\"sm\">Pros<\/th>\n<th data-start=\"4662\" data-end=\"4670\" data-col-size=\"sm\">Cons<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"4695\" data-end=\"5000\">\n<tr data-start=\"4695\" data-end=\"4771\">\n<td data-start=\"4695\" data-end=\"4719\" data-col-size=\"sm\"><strong data-start=\"4697\" data-end=\"4718\">Outright purchase<\/strong><\/td>\n<td data-start=\"4719\" data-end=\"4726\" data-col-size=\"sm\">100%<\/td>\n<td data-start=\"4726\" data-end=\"4736\" data-col-size=\"sm\">6\u20137 yrs<\/td>\n<td data-start=\"4736\" data-end=\"4755\" data-col-size=\"sm\">No interest cost<\/td>\n<td data-start=\"4755\" data-end=\"4771\" data-col-size=\"sm\">High upfront<\/td>\n<\/tr>\n<tr data-start=\"4772\" data-end=\"4852\">\n<td data-start=\"4772\" data-end=\"4787\" data-col-size=\"sm\"><strong data-start=\"4774\" data-end=\"4786\">Loan 70%<\/strong><\/td>\n<td data-start=\"4787\" data-end=\"4804\" data-col-size=\"sm\">30% + interest<\/td>\n<td data-start=\"4804\" data-end=\"4814\" data-col-size=\"sm\">8\u20139 yrs<\/td>\n<td data-start=\"4814\" data-end=\"4832\" data-col-size=\"sm\">Eases cash flow<\/td>\n<td data-start=\"4832\" data-end=\"4852\" data-col-size=\"sm\">Interest expense<\/td>\n<\/tr>\n<tr data-start=\"4853\" data-end=\"4921\">\n<td data-start=\"4853\" data-end=\"4867\" data-col-size=\"sm\"><strong data-start=\"4855\" data-end=\"4866\">Leasing<\/strong><\/td>\n<td data-start=\"4867\" data-end=\"4879\" data-col-size=\"sm\">0 upfront<\/td>\n<td data-start=\"4879\" data-end=\"4889\" data-col-size=\"sm\">6\u20137 yrs<\/td>\n<td data-start=\"4889\" data-end=\"4900\" data-col-size=\"sm\">Flexible<\/td>\n<td data-start=\"4900\" data-end=\"4921\" data-col-size=\"sm\">Higher total cost<\/td>\n<\/tr>\n<tr data-start=\"4922\" data-end=\"5000\">\n<td data-start=\"4922\" data-end=\"4932\" data-col-size=\"sm\"><strong data-start=\"4924\" data-end=\"4931\">PPA<\/strong><\/td>\n<td data-start=\"4932\" data-end=\"4942\" data-col-size=\"sm\">0 capex<\/td>\n<td data-start=\"4942\" data-end=\"4954\" data-col-size=\"sm\">10\u201312 yrs<\/td>\n<td data-start=\"4954\" data-end=\"4974\" data-col-size=\"sm\">No technical risk<\/td>\n<td data-start=\"4974\" data-end=\"5000\" data-col-size=\"sm\">Long-term fixed tariff<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"5002\" data-end=\"5165\">Banks such as <strong data-start=\"5016\" data-end=\"5049\">Vietcombank, BIDV, VietinBank<\/strong> currently offer preferential loans around <strong data-start=\"5092\" data-end=\"5105\">7\u20139%\/year<\/strong> with tenors up to <strong data-start=\"5124\" data-end=\"5136\">10 years<\/strong> (subject to credit profile).<\/p>\n<hr data-start=\"5167\" data-end=\"5170\" \/>\n<h2 data-start=\"5172\" data-end=\"5218\">Step 2 \u2014 Detailed System Design (2\u20133 Weeks)<\/h2>\n<h3 data-start=\"5220\" data-end=\"5257\">System Layout &amp; Core Calculations<\/h3>\n<p data-start=\"5259\" data-end=\"5276\"><strong data-start=\"5259\" data-end=\"5276\">Module count:<\/strong><\/p>\n<blockquote data-start=\"5278\" data-end=\"5335\">\n<p data-start=\"5280\" data-end=\"5335\"><strong data-start=\"5280\" data-end=\"5335\">#Modules = System DC size (Wp) \u00f7 Module rating (Wp)<\/strong><\/p>\n<\/blockquote>\n<p data-start=\"5337\" data-end=\"5510\">Example: <strong data-start=\"5346\" data-end=\"5360\">100 kWp DC<\/strong> (~<strong data-start=\"5363\" data-end=\"5378\">85\u201395 kW AC<\/strong>) using <strong data-start=\"5386\" data-end=\"5396\">650 Wp<\/strong> modules \u2192<br data-start=\"5406\" data-end=\"5409\" \/><strong data-start=\"5409\" data-end=\"5440\">100,000 \u00f7 650 = 154 modules<\/strong><br data-start=\"5440\" data-end=\"5443\" \/>Recommended inverter AC: <strong data-start=\"5468\" data-end=\"5480\">85\u201395 kW<\/strong> (<strong data-start=\"5482\" data-end=\"5509\">DC\/AC ratio = 1.05\u20131.15<\/strong>)<\/p>\n<blockquote data-start=\"5512\" data-end=\"5578\">\n<p data-start=\"5514\" data-end=\"5578\">2025 module ratings commonly <strong data-start=\"5543\" data-end=\"5557\">600\u2013720 Wp<\/strong> (PERC, TOPCon, HJT).<\/p>\n<\/blockquote>\n<p data-start=\"5580\" data-end=\"5754\"><strong data-start=\"5580\" data-end=\"5603\">Inverter selection:<\/strong><br data-start=\"5603\" data-end=\"5606\" \/>Target <strong data-start=\"5613\" data-end=\"5634\">DC\/AC = 1.05\u20131.15<\/strong> (e.g., 100 kW DC \u2192 <strong data-start=\"5654\" data-end=\"5669\">85\u201395 kW AC<\/strong> inverter). This maximizes yield in good irradiance without overloading the inverter.<\/p>\n<h3 data-start=\"5756\" data-end=\"5787\">Array Layout &amp; Optimal Tilt<\/h3>\n<p data-start=\"5789\" data-end=\"5820\"><strong data-start=\"5789\" data-end=\"5818\">Tilt by region (Vietnam):<\/strong><\/p>\n<ul data-start=\"5821\" data-end=\"5886\">\n<li data-start=\"5821\" data-end=\"5842\">\n<p data-start=\"5823\" data-end=\"5842\">North: <strong data-start=\"5830\" data-end=\"5840\">20\u201325\u00b0<\/strong><\/p>\n<\/li>\n<li data-start=\"5843\" data-end=\"5866\">\n<p data-start=\"5845\" data-end=\"5866\">Central: <strong data-start=\"5854\" data-end=\"5864\">15\u201320\u00b0<\/strong><\/p>\n<\/li>\n<li data-start=\"5867\" data-end=\"5886\">\n<p data-start=\"5869\" data-end=\"5886\">South: <strong data-start=\"5876\" data-end=\"5886\">10\u201315\u00b0<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5888\" data-end=\"5902\"><strong data-start=\"5888\" data-end=\"5900\">Spacing:<\/strong><\/p>\n<ul data-start=\"5903\" data-end=\"6055\">\n<li data-start=\"5903\" data-end=\"5969\">\n<p data-start=\"5905\" data-end=\"5969\">Inter-module gap: <strong data-start=\"5923\" data-end=\"5934\">5\u201310 mm<\/strong> for ventilation &amp; thermal relief<\/p>\n<\/li>\n<li data-start=\"5970\" data-end=\"6055\">\n<p data-start=\"5972\" data-end=\"6055\">Row spacing: per shading geometry; typically <strong data-start=\"6017\" data-end=\"6027\">1.5\u20132\u00d7<\/strong> the height of the front row<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"6057\" data-end=\"6083\">Performance Simulation<\/h3>\n<p data-start=\"6085\" data-end=\"6139\">Use <strong data-start=\"6089\" data-end=\"6099\">PVsyst<\/strong> for yield modeling and PR estimation.<\/p>\n<ul data-start=\"6140\" data-end=\"6240\">\n<li data-start=\"6140\" data-end=\"6184\">\n<p data-start=\"6142\" data-end=\"6184\">Good PR: <strong data-start=\"6151\" data-end=\"6161\">80\u201385%<\/strong>; Excellent: <strong data-start=\"6174\" data-end=\"6182\">&gt;85%<\/strong><\/p>\n<\/li>\n<li data-start=\"6185\" data-end=\"6240\">\n<p data-start=\"6187\" data-end=\"6240\"><strong data-start=\"6187\" data-end=\"6195\">&lt;75%<\/strong> suggests design\/equipment issues to address.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"6242\" data-end=\"6245\" \/>\n<h2 data-start=\"6247\" data-end=\"6304\">Step 3 \u2014 Equipment &amp; Materials Procurement (3\u20134 Weeks)<\/h2>\n<h3 data-start=\"6306\" data-end=\"6332\">Choosing Solar Modules<\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"6334\" data-end=\"6681\">\n<thead data-start=\"6334\" data-end=\"6391\">\n<tr data-start=\"6334\" data-end=\"6391\">\n<th data-start=\"6334\" data-end=\"6346\" data-col-size=\"sm\">Criterion<\/th>\n<th data-start=\"6346\" data-end=\"6358\" data-col-size=\"sm\">Mono PERC<\/th>\n<th data-start=\"6358\" data-end=\"6367\" data-col-size=\"sm\">TOPCon<\/th>\n<th data-start=\"6367\" data-end=\"6391\" data-col-size=\"sm\">HJT (Heterojunction)<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"6410\" data-end=\"6681\">\n<tr data-start=\"6410\" data-end=\"6451\">\n<td data-start=\"6410\" data-end=\"6423\" data-col-size=\"sm\">Efficiency<\/td>\n<td data-start=\"6423\" data-end=\"6432\" data-col-size=\"sm\">20\u201322%<\/td>\n<td data-start=\"6432\" data-end=\"6441\" data-col-size=\"sm\">22\u201324%<\/td>\n<td data-start=\"6441\" data-end=\"6451\" data-col-size=\"sm\">24\u201326%<\/td>\n<\/tr>\n<tr data-start=\"6452\" data-end=\"6491\">\n<td data-start=\"6452\" data-end=\"6463\" data-col-size=\"sm\">Lifetime<\/td>\n<td data-start=\"6463\" data-end=\"6472\" data-col-size=\"sm\">25 yrs<\/td>\n<td data-start=\"6472\" data-end=\"6481\" data-col-size=\"sm\">30 yrs<\/td>\n<td data-start=\"6481\" data-end=\"6491\" data-col-size=\"sm\">30 yrs<\/td>\n<\/tr>\n<tr data-start=\"6492\" data-end=\"6540\">\n<td data-start=\"6492\" data-end=\"6506\" data-col-size=\"sm\">Degradation<\/td>\n<td data-start=\"6506\" data-end=\"6517\" data-col-size=\"sm\">~0.5%\/yr<\/td>\n<td data-start=\"6517\" data-end=\"6528\" data-col-size=\"sm\">~0.4%\/yr<\/td>\n<td data-start=\"6528\" data-end=\"6540\" data-col-size=\"sm\">~0.3%\/yr<\/td>\n<\/tr>\n<tr data-start=\"6541\" data-end=\"6587\">\n<td data-start=\"6541\" data-end=\"6555\" data-col-size=\"sm\">Price level<\/td>\n<td data-start=\"6555\" data-end=\"6566\" data-col-size=\"sm\">Standard<\/td>\n<td data-start=\"6566\" data-end=\"6576\" data-col-size=\"sm\">+10\u201315%<\/td>\n<td data-start=\"6576\" data-end=\"6587\" data-col-size=\"sm\">+20\u201330%<\/td>\n<\/tr>\n<tr data-start=\"6588\" data-end=\"6681\">\n<td data-start=\"6588\" data-end=\"6599\" data-col-size=\"sm\">Best for<\/td>\n<td data-start=\"6599\" data-end=\"6616\" data-col-size=\"sm\">Mainstream ROI<\/td>\n<td data-start=\"6616\" data-end=\"6645\" data-col-size=\"sm\">Long-term, high-efficiency<\/td>\n<td data-start=\"6645\" data-end=\"6681\" data-col-size=\"sm\">Premium sites, limited roof area<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"6683\" data-end=\"6850\">Reputable brands: <strong data-start=\"6701\" data-end=\"6762\">Longi, JA Solar, Trina Solar, Canadian Solar, Jinko Solar<\/strong>. Prefer modules with <strong data-start=\"6784\" data-end=\"6797\">IEC 61215<\/strong> (quality) and <strong data-start=\"6812\" data-end=\"6825\">IEC 61730<\/strong> (safety) certifications.<\/p>\n<blockquote data-start=\"6852\" data-end=\"6959\">\n<p data-start=\"6854\" data-end=\"6959\">Note: <strong data-start=\"6860\" data-end=\"6879\">Polycrystalline<\/strong> has been largely displaced by <strong data-start=\"6910\" data-end=\"6923\">Mono PERC<\/strong> since 2023 due to lower efficiency.<\/p>\n<\/blockquote>\n<h3 data-start=\"6961\" data-end=\"6983\">Choosing Inverters<\/h3>\n<p data-start=\"6985\" data-end=\"7000\">Common types:<\/p>\n<ul data-start=\"7001\" data-end=\"7226\">\n<li data-start=\"7001\" data-end=\"7065\">\n<p data-start=\"7003\" data-end=\"7065\"><strong data-start=\"7003\" data-end=\"7024\">String inverters:<\/strong> mid-scale (50\u2013500 kWp), cost-effective<\/p>\n<\/li>\n<li data-start=\"7066\" data-end=\"7147\">\n<p data-start=\"7068\" data-end=\"7147\"><strong data-start=\"7068\" data-end=\"7090\">Central inverters:<\/strong> large plants (&gt;500 kWp), high efficiency, easy service<\/p>\n<\/li>\n<li data-start=\"7148\" data-end=\"7226\">\n<p data-start=\"7150\" data-end=\"7226\"><strong data-start=\"7150\" data-end=\"7169\">Microinverters:<\/strong> small systems; excellent shade handling but highest cost<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7228\" data-end=\"7352\">Quality brands: <strong data-start=\"7244\" data-end=\"7288\">Huawei, SMA, Sungrow, Fronius, SolarEdge<\/strong>. Ensure <strong data-start=\"7297\" data-end=\"7317\">\u22655-year warranty<\/strong> and <strong data-start=\"7322\" data-end=\"7343\">remote monitoring<\/strong> support.<\/p>\n<h3 data-start=\"7354\" data-end=\"7393\">Balance-of-System (BOS) &amp; QA Checks<\/h3>\n<ul data-start=\"7395\" data-end=\"7697\">\n<li data-start=\"7395\" data-end=\"7562\">\n<p data-start=\"7397\" data-end=\"7562\"><strong data-start=\"7397\" data-end=\"7409\">Racking:<\/strong> Aluminum offers superior corrosion resistance vs. galvanized steel (typically <strong data-start=\"7488\" data-end=\"7498\">15\u201320%<\/strong> higher cost). Galvanized steel suits cost-optimized projects.<\/p>\n<\/li>\n<li data-start=\"7563\" data-end=\"7697\">\n<p data-start=\"7565\" data-end=\"7697\">Verify documents: <strong data-start=\"7583\" data-end=\"7592\">CO\/CQ<\/strong>, IEC\/TCVN certificates, OEM warranty labels (with lookup codes), clear serials, and complete datasheets.<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"7699\" data-end=\"7702\" \/>\n<h2 data-start=\"7704\" data-end=\"7755\">Step 4 \u2014 Construction &amp; Installation (1\u20133 Weeks)<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14158\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy.jpg\" alt=\"\" width=\"2048\" height=\"1076\" title=\"\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy.jpg 2048w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-768x404.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-600x315.jpg 600w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<h3 data-start=\"7757\" data-end=\"7779\">Safety Preparation<\/h3>\n<p data-start=\"7781\" data-end=\"7799\"><strong data-start=\"7781\" data-end=\"7799\">Mandatory PPE:<\/strong><\/p>\n<ul data-start=\"7800\" data-end=\"7972\">\n<li data-start=\"7800\" data-end=\"7863\">\n<p data-start=\"7802\" data-end=\"7863\">Fall arrest (for work <strong data-start=\"7824\" data-end=\"7834\">&gt;1.8 m<\/strong>, per <strong data-start=\"7840\" data-end=\"7860\">QCVN 01:2020\/BCT<\/strong>)<\/p>\n<\/li>\n<li data-start=\"7864\" data-end=\"7928\">\n<p data-start=\"7866\" data-end=\"7928\">Safety helmet, goggles, non-slip footwear, dielectric gloves<\/p>\n<\/li>\n<li data-start=\"7929\" data-end=\"7972\">\n<p data-start=\"7931\" data-end=\"7972\">Workplace accident insurance for all crew<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7974\" data-end=\"8000\"><strong data-start=\"7974\" data-end=\"8000\">5-step safety routine:<\/strong><\/p>\n<ol data-start=\"8001\" data-end=\"8190\">\n<li data-start=\"8001\" data-end=\"8037\">\n<p data-start=\"8004\" data-end=\"8037\">Inspect all tools and equipment<\/p>\n<\/li>\n<li data-start=\"8038\" data-end=\"8073\">\n<p data-start=\"8041\" data-end=\"8073\">Isolate power in the work zone<\/p>\n<\/li>\n<li data-start=\"8074\" data-end=\"8105\">\n<p data-start=\"8077\" data-end=\"8105\">Post clear warning signage<\/p>\n<\/li>\n<li data-start=\"8106\" data-end=\"8150\">\n<p data-start=\"8109\" data-end=\"8150\">Verify fall-arrest gear before climbing<\/p>\n<\/li>\n<li data-start=\"8151\" data-end=\"8190\">\n<p data-start=\"8154\" data-end=\"8190\">Assign a dedicated safety supervisor<\/p>\n<\/li>\n<\/ol>\n<h3 data-start=\"8192\" data-end=\"8227\">Mounting Structure Installation<\/h3>\n<ul data-start=\"8229\" data-end=\"8574\">\n<li data-start=\"8229\" data-end=\"8333\">\n<p data-start=\"8231\" data-end=\"8333\"><strong data-start=\"8231\" data-end=\"8248\">Mark &amp; drill:<\/strong> Use laser alignment. Typical standoff spacing <strong data-start=\"8295\" data-end=\"8308\">0.8\u20131.2 m<\/strong> (roof\/type dependent).<\/p>\n<\/li>\n<li data-start=\"8334\" data-end=\"8467\">\n<p data-start=\"8336\" data-end=\"8467\"><strong data-start=\"8336\" data-end=\"8365\">Footings &amp; waterproofing:<\/strong> After setting feet, seal penetrations with specialty silicone or PU foam\u2014critical to prevent leaks.<\/p>\n<\/li>\n<li data-start=\"8468\" data-end=\"8574\">\n<p data-start=\"8470\" data-end=\"8574\"><strong data-start=\"8470\" data-end=\"8480\">Rails:<\/strong> Level with a spirit level; square with a try square. Allowable deviation: <strong data-start=\"8555\" data-end=\"8573\">\u00b15 mm per 10 m<\/strong>.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"8576\" data-end=\"8610\">Module &amp; Inverter Installation<\/h3>\n<p data-start=\"8612\" data-end=\"8791\">Install modules <strong data-start=\"8628\" data-end=\"8660\">bottom-to-top, left-to-right<\/strong> to aid workflow and reduce drop risk. Each module is fixed with <strong data-start=\"8725\" data-end=\"8739\">4\u20138 clamps<\/strong> (size dependent); verify tightness after placement.<\/p>\n<p data-start=\"8793\" data-end=\"8815\"><strong data-start=\"8793\" data-end=\"8813\">Inverter siting:<\/strong><\/p>\n<ul data-start=\"8816\" data-end=\"9041\">\n<li data-start=\"8816\" data-end=\"8870\">\n<p data-start=\"8818\" data-end=\"8870\">Out of direct sun (<strong data-start=\"8837\" data-end=\"8846\">&lt;40\u00b0C<\/strong> operating preference)<\/p>\n<\/li>\n<li data-start=\"8871\" data-end=\"8912\">\n<p data-start=\"8873\" data-end=\"8912\">Cool, accessible location for service<\/p>\n<\/li>\n<li data-start=\"8913\" data-end=\"8991\">\n<p data-start=\"8915\" data-end=\"8991\">Near the <strong data-start=\"8924\" data-end=\"8967\">electrical cabinet (distribution board)<\/strong> to minimize AC losses<\/p>\n<\/li>\n<li data-start=\"8992\" data-end=\"9041\">\n<p data-start=\"8994\" data-end=\"9041\"><strong data-start=\"8994\" data-end=\"9004\">\u226530 cm<\/strong> clearance from walls for ventilation<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"9043\" data-end=\"9069\">Electrical Connections<\/h3>\n<p data-start=\"9071\" data-end=\"9279\">The system comprises <strong data-start=\"9092\" data-end=\"9107\">DC circuits<\/strong> (modules \u2192 inverter) and <strong data-start=\"9133\" data-end=\"9148\">AC circuits<\/strong> (inverter \u2192 grid). Follow conductor sizing per <strong data-start=\"9196\" data-end=\"9243\">TCVN 7447-7-712:2019 (IEC 60364-7-712:2017)<\/strong> to ensure safety and minimize loss.<\/p>\n<p data-start=\"9281\" data-end=\"9305\"><strong data-start=\"9281\" data-end=\"9305\">Required protection:<\/strong><\/p>\n<ul data-start=\"9306\" data-end=\"9430\">\n<li data-start=\"9306\" data-end=\"9343\">\n<p data-start=\"9308\" data-end=\"9343\"><strong data-start=\"9308\" data-end=\"9341\">DC &amp; AC circuit breakers (CB)<\/strong><\/p>\n<\/li>\n<li data-start=\"9344\" data-end=\"9382\">\n<p data-start=\"9346\" data-end=\"9382\"><strong data-start=\"9346\" data-end=\"9380\">Surge Protection Devices (SPD)<\/strong><\/p>\n<\/li>\n<li data-start=\"9383\" data-end=\"9430\">\n<p data-start=\"9385\" data-end=\"9430\"><strong data-start=\"9385\" data-end=\"9404\">Earthing system<\/strong> with resistance <strong data-start=\"9421\" data-end=\"9430\">&lt;10 \u03a9<\/strong><\/p>\n<\/li>\n<\/ul>\n<blockquote data-start=\"9432\" data-end=\"9603\">\n<p data-start=\"9434\" data-end=\"9603\"><strong data-start=\"9434\" data-end=\"9470\">Stringing phrasing (controlled):<\/strong><br data-start=\"9470\" data-end=\"9473\" \/><em data-start=\"9475\" data-end=\"9603\">Modules are wired in series into strings; multiple strings may be paralleled at the inverter\/combiner according to the design.<\/em><\/p>\n<\/blockquote>\n<hr data-start=\"9605\" data-end=\"9608\" \/>\n<h2 data-start=\"9610\" data-end=\"9651\">Step 5 \u2014 Testing &amp; Acceptance (1 Week)<\/h2>\n<h3 data-start=\"9653\" data-end=\"9684\">Electrical Parameter Checks<\/h3>\n<p data-start=\"9686\" data-end=\"9697\"><strong data-start=\"9686\" data-end=\"9697\">DC side<\/strong><\/p>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"9699\" data-end=\"9988\">\n<thead data-start=\"9699\" data-end=\"9739\">\n<tr data-start=\"9699\" data-end=\"9739\">\n<th data-start=\"9699\" data-end=\"9711\" data-col-size=\"sm\">Parameter<\/th>\n<th data-start=\"9711\" data-end=\"9725\" data-col-size=\"sm\">Requirement<\/th>\n<th data-start=\"9725\" data-end=\"9739\" data-col-size=\"sm\">Instrument<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"9754\" data-end=\"9988\">\n<tr data-start=\"9754\" data-end=\"9817\">\n<td data-start=\"9754\" data-end=\"9787\" data-col-size=\"sm\"><strong data-start=\"9756\" data-end=\"9763\">Voc<\/strong> (open-circuit voltage)<\/td>\n<td data-start=\"9787\" data-end=\"9803\" data-col-size=\"sm\">Datasheet \u00b15%<\/td>\n<td data-start=\"9803\" data-end=\"9817\" data-col-size=\"sm\">Multimeter<\/td>\n<\/tr>\n<tr data-start=\"9818\" data-end=\"9883\">\n<td data-start=\"9818\" data-end=\"9852\" data-col-size=\"sm\"><strong data-start=\"9820\" data-end=\"9827\">Isc<\/strong> (short-circuit current)<\/td>\n<td data-start=\"9852\" data-end=\"9868\" data-col-size=\"sm\">Datasheet \u00b15%<\/td>\n<td data-start=\"9868\" data-end=\"9883\" data-col-size=\"sm\">Clamp meter<\/td>\n<\/tr>\n<tr data-start=\"9884\" data-end=\"9944\">\n<td data-start=\"9884\" data-end=\"9917\" data-col-size=\"sm\"><strong data-start=\"9886\" data-end=\"9892\">IR<\/strong> (insulation resistance)<\/td>\n<td data-start=\"9917\" data-end=\"9929\" data-col-size=\"sm\"><strong data-start=\"9919\" data-end=\"9928\">\u22651 M\u03a9<\/strong><\/td>\n<td data-start=\"9929\" data-end=\"9944\" data-col-size=\"sm\">Megohmmeter<\/td>\n<\/tr>\n<tr data-start=\"9945\" data-end=\"9988\">\n<td data-start=\"9945\" data-end=\"9960\" data-col-size=\"sm\"><strong data-start=\"9947\" data-end=\"9959\">Polarity<\/strong><\/td>\n<td data-start=\"9960\" data-end=\"9974\" data-col-size=\"sm\">Correct +\/\u2013<\/td>\n<td data-start=\"9974\" data-end=\"9988\" data-col-size=\"sm\">Multimeter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"9990\" data-end=\"10001\"><strong data-start=\"9990\" data-end=\"10001\">AC side<\/strong><\/p>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"10003\" data-end=\"10221\">\n<thead data-start=\"10003\" data-end=\"10035\">\n<tr data-start=\"10003\" data-end=\"10035\">\n<th data-start=\"10003\" data-end=\"10015\" data-col-size=\"sm\">Parameter<\/th>\n<th data-start=\"10015\" data-end=\"10026\" data-col-size=\"sm\">Standard<\/th>\n<th data-start=\"10026\" data-end=\"10035\" data-col-size=\"sm\">Limit<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"10050\" data-end=\"10221\">\n<tr data-start=\"10050\" data-end=\"10090\">\n<td data-start=\"10050\" data-end=\"10060\" data-col-size=\"sm\"><strong data-start=\"10052\" data-end=\"10059\">Vac<\/strong><\/td>\n<td data-start=\"10060\" data-end=\"10077\" data-col-size=\"sm\"><strong data-start=\"10062\" data-end=\"10076\">380 V \u00b110%<\/strong><\/td>\n<td data-start=\"10077\" data-end=\"10090\" data-col-size=\"sm\">342\u2013418 V<\/td>\n<\/tr>\n<tr data-start=\"10091\" data-end=\"10131\">\n<td data-start=\"10091\" data-end=\"10107\" data-col-size=\"sm\"><strong data-start=\"10093\" data-end=\"10106\">Frequency<\/strong><\/td>\n<td data-start=\"10107\" data-end=\"10115\" data-col-size=\"sm\">50 Hz<\/td>\n<td data-start=\"10115\" data-end=\"10131\" data-col-size=\"sm\">49.5\u201350.5 Hz<\/td>\n<\/tr>\n<tr data-start=\"10132\" data-end=\"10176\">\n<td data-start=\"10132\" data-end=\"10151\" data-col-size=\"sm\"><strong data-start=\"10134\" data-end=\"10150\">Power factor<\/strong><\/td>\n<td data-start=\"10151\" data-end=\"10162\" data-col-size=\"sm\"><strong data-start=\"10153\" data-end=\"10161\">\u22650.9<\/strong><\/td>\n<td data-start=\"10162\" data-end=\"10176\" data-col-size=\"sm\">As per EVN<\/td>\n<\/tr>\n<tr data-start=\"10177\" data-end=\"10221\">\n<td data-start=\"10177\" data-end=\"10187\" data-col-size=\"sm\"><strong data-start=\"10179\" data-end=\"10186\">THD<\/strong><\/td>\n<td data-start=\"10187\" data-end=\"10197\" data-col-size=\"sm\"><strong data-start=\"10189\" data-end=\"10196\">&lt;5%<\/strong><\/td>\n<td data-start=\"10197\" data-end=\"10221\" data-col-size=\"sm\">Ensure power quality<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h3 data-start=\"10223\" data-end=\"10253\">Commissioning &amp; Monitoring<\/h3>\n<p data-start=\"10255\" data-end=\"10307\">Run the system <strong data-start=\"10270\" data-end=\"10294\">3\u20135 consecutive days<\/strong> to verify:<\/p>\n<ul data-start=\"10308\" data-end=\"10485\">\n<li data-start=\"10308\" data-end=\"10358\">\n<p data-start=\"10310\" data-end=\"10358\">Output meets modeled expectations (<strong data-start=\"10345\" data-end=\"10355\">PVsyst<\/strong>)<\/p>\n<\/li>\n<li data-start=\"10359\" data-end=\"10401\">\n<p data-start=\"10361\" data-end=\"10401\">Inverter temperature within safe range<\/p>\n<\/li>\n<li data-start=\"10402\" data-end=\"10438\">\n<p data-start=\"10404\" data-end=\"10438\">No fault codes\/abnormal warnings<\/p>\n<\/li>\n<li data-start=\"10439\" data-end=\"10485\">\n<p data-start=\"10441\" data-end=\"10485\">Monitoring app is stable with real-time data<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"10487\" data-end=\"10515\">Acceptance Documentation<\/h3>\n<p data-start=\"10517\" data-end=\"10755\">The acceptance report should be signed by the <strong data-start=\"10563\" data-end=\"10589\">owner\u2019s representative<\/strong>, <strong data-start=\"10591\" data-end=\"10609\">EPC contractor<\/strong>, <strong data-start=\"10611\" data-end=\"10630\">site supervisor<\/strong> (if any), and <strong data-start=\"10645\" data-end=\"10664\">design engineer<\/strong>. Attach the as-built drawings, equipment certificates, test results, and O&amp;M instructions.<\/p>\n<hr data-start=\"10757\" data-end=\"10760\" \/>\n<h2 data-start=\"10762\" data-end=\"10833\">Step 6 \u2014 Handover &amp; EVN Grid Registration (1 Week + 4\u20136 Weeks Queue)<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14162\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-1.jpg\" alt=\"\" width=\"2048\" height=\"1076\" title=\"\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-1.jpg 2048w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-1-768x404.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-1-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-1-600x315.jpg 600w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<h3 data-start=\"10835\" data-end=\"10862\">Owner\u2019s Operating Guide<\/h3>\n<ul data-start=\"10864\" data-end=\"11084\">\n<li data-start=\"10864\" data-end=\"10931\">\n<p data-start=\"10866\" data-end=\"10931\">Safe on\/off sequence (<strong data-start=\"10888\" data-end=\"10928\">isolate AC \u2192 DC; re-energize DC \u2192 AC<\/strong>)<\/p>\n<\/li>\n<li data-start=\"10932\" data-end=\"11003\">\n<p data-start=\"10934\" data-end=\"11003\">Using the monitoring app to track production and catch early faults<\/p>\n<\/li>\n<li data-start=\"11004\" data-end=\"11084\">\n<p data-start=\"11006\" data-end=\"11084\">Recognizing common issues (no output, low power) and when to call a technician<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"11086\" data-end=\"11112\">EVN Registration Guide<\/h3>\n<p data-start=\"11114\" data-end=\"11128\"><strong data-start=\"11114\" data-end=\"11128\">Checklist:<\/strong><\/p>\n<ul data-start=\"11129\" data-end=\"11637\">\n<li data-start=\"11129\" data-end=\"11182\">\n<p data-start=\"11131\" data-end=\"11182\">Rooftop PV grid-connection application (EVN form)<\/p>\n<\/li>\n<li data-start=\"11183\" data-end=\"11232\">\n<p data-start=\"11185\" data-end=\"11232\">Land use right certificate or lease agreement<\/p>\n<\/li>\n<li data-start=\"11233\" data-end=\"11292\">\n<p data-start=\"11235\" data-end=\"11292\">Design drawings stamped by a licensed design consultant<\/p>\n<\/li>\n<li data-start=\"11293\" data-end=\"11326\">\n<p data-start=\"11295\" data-end=\"11326\">CO\/CQ for modules &amp; inverters<\/p>\n<\/li>\n<li data-start=\"11327\" data-end=\"11348\">\n<p data-start=\"11329\" data-end=\"11348\">Acceptance report<\/p>\n<\/li>\n<li data-start=\"11349\" data-end=\"11415\">\n<p data-start=\"11351\" data-end=\"11415\">Building permit (if structural changes or local rules require)<\/p>\n<\/li>\n<li data-start=\"11416\" data-end=\"11491\">\n<p data-start=\"11418\" data-end=\"11491\">Environmental impact report (only for <strong data-start=\"11456\" data-end=\"11465\">&gt;1 MW<\/strong> or per local authority)<\/p>\n<\/li>\n<li data-start=\"11492\" data-end=\"11563\">\n<p data-start=\"11494\" data-end=\"11563\">Project insurance (if required\u2014often for <strong data-start=\"11535\" data-end=\"11546\">&gt;100 kW<\/strong> or per lender)<\/p>\n<\/li>\n<li data-start=\"11564\" data-end=\"11615\">\n<p data-start=\"11566\" data-end=\"11615\">Power Purchase Agreement (PPA) per EVN template<\/p>\n<\/li>\n<li data-start=\"11616\" data-end=\"11637\">\n<p data-start=\"11618\" data-end=\"11637\">Single-line diagram<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"11639\" data-end=\"11661\"><strong data-start=\"11639\" data-end=\"11661\">Power-class notes:<\/strong><\/p>\n<ul data-start=\"11663\" data-end=\"12007\">\n<li data-start=\"11663\" data-end=\"11802\">\n<p data-start=\"11665\" data-end=\"11679\"><strong data-start=\"11665\" data-end=\"11677\">&lt;100 kW:<\/strong><\/p>\n<ul data-start=\"11682\" data-end=\"11802\">\n<li data-start=\"11682\" data-end=\"11802\">\n<p data-start=\"11684\" data-end=\"11802\">Notification only (<strong data-start=\"11703\" data-end=\"11714\">Form 04<\/strong> under <strong data-start=\"11721\" data-end=\"11746\">Decree 135\/2024\/N\u0110-CP<\/strong>); land\/lease docs; acceptance; equipment certificates<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"11804\" data-end=\"11898\">\n<p data-start=\"11806\" data-end=\"11825\"><strong data-start=\"11806\" data-end=\"11823\">100\u20131,000 kW:<\/strong><\/p>\n<ul data-start=\"11828\" data-end=\"11898\">\n<li data-start=\"11828\" data-end=\"11898\">\n<p data-start=\"11830\" data-end=\"11898\">All &lt;100 kW docs <strong data-start=\"11847\" data-end=\"11855\">plus<\/strong> stamped design, single-line diagram, PPA<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"11900\" data-end=\"12007\">\n<p data-start=\"11902\" data-end=\"11938\"><strong data-start=\"11902\" data-end=\"11915\">\u22651,000 kW<\/strong> with surplus export:<\/p>\n<ul data-start=\"11941\" data-end=\"12007\">\n<li data-start=\"11941\" data-end=\"12007\">\n<p data-start=\"11943\" data-end=\"12007\">All 100\u20131,000 kW docs <strong data-start=\"11965\" data-end=\"11973\">plus<\/strong> <strong data-start=\"11974\" data-end=\"12007\">Electricity Operation License<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p data-start=\"12009\" data-end=\"12031\"><strong data-start=\"12009\" data-end=\"12031\">Typical timelines:<\/strong><\/p>\n<ul data-start=\"12033\" data-end=\"12507\">\n<li data-start=\"12033\" data-end=\"12237\">\n<p data-start=\"12035\" data-end=\"12063\"><strong data-start=\"12035\" data-end=\"12061\">&lt;100 kW (most common):<\/strong><\/p>\n<ul data-start=\"12066\" data-end=\"12237\">\n<li data-start=\"12066\" data-end=\"12117\">\n<p data-start=\"12068\" data-end=\"12117\">Week 1: Submit notification &amp; docs to local EVN<\/p>\n<\/li>\n<li data-start=\"12120\" data-end=\"12175\">\n<p data-start=\"12122\" data-end=\"12175\">Weeks 2\u20133: EVN survey &amp; install bidirectional meter<\/p>\n<\/li>\n<li data-start=\"12178\" data-end=\"12212\">\n<p data-start=\"12180\" data-end=\"12212\">Week 4: Official commissioning<\/p>\n<\/li>\n<li data-start=\"12215\" data-end=\"12237\">\n<p data-start=\"12217\" data-end=\"12237\"><strong data-start=\"12217\" data-end=\"12237\">Total: 3\u20134 weeks<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"12239\" data-end=\"12507\">\n<p data-start=\"12241\" data-end=\"12260\"><strong data-start=\"12241\" data-end=\"12258\">100\u20131,000 kW:<\/strong><\/p>\n<ul data-start=\"12263\" data-end=\"12507\">\n<li data-start=\"12263\" data-end=\"12306\">\n<p data-start=\"12265\" data-end=\"12306\">Weeks 1\u20132: Submit design &amp; registration<\/p>\n<\/li>\n<li data-start=\"12309\" data-end=\"12369\">\n<p data-start=\"12311\" data-end=\"12369\">Weeks 3\u20134: EVN review; requests for supplement if needed<\/p>\n<\/li>\n<li data-start=\"12372\" data-end=\"12420\">\n<p data-start=\"12374\" data-end=\"12420\">Weeks 5\u20136: EVN site checks &amp; technical tests<\/p>\n<\/li>\n<li data-start=\"12423\" data-end=\"12443\">\n<p data-start=\"12425\" data-end=\"12443\">Week 7: Sign PPA<\/p>\n<\/li>\n<li data-start=\"12446\" data-end=\"12482\">\n<p data-start=\"12448\" data-end=\"12482\">Week 8: Meter install &amp; grid-tie<\/p>\n<\/li>\n<li data-start=\"12485\" data-end=\"12507\">\n<p data-start=\"12487\" data-end=\"12507\"><strong data-start=\"12487\" data-end=\"12507\">Total: 6\u20138 weeks<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<blockquote data-start=\"12509\" data-end=\"12577\">\n<p data-start=\"12511\" data-end=\"12577\">Actual times can be longer depending on locality and grid loading.<\/p>\n<\/blockquote>\n<p data-start=\"12579\" data-end=\"12609\"><strong data-start=\"12579\" data-end=\"12609\">Per Decree 135\/2024\/N\u0110-CP:<\/strong><\/p>\n<ul data-start=\"12610\" data-end=\"12817\">\n<li data-start=\"12610\" data-end=\"12675\">\n<p data-start=\"12612\" data-end=\"12675\"><strong data-start=\"12612\" data-end=\"12624\">&lt;100 kW:<\/strong> Notification to EVN only; no formal registration<\/p>\n<\/li>\n<li data-start=\"12676\" data-end=\"12737\">\n<p data-start=\"12678\" data-end=\"12737\"><strong data-start=\"12678\" data-end=\"12695\">100\u20131,000 kW:<\/strong> EVN responds within <strong data-start=\"12716\" data-end=\"12735\">15 working days<\/strong><\/p>\n<\/li>\n<li data-start=\"12738\" data-end=\"12817\">\n<p data-start=\"12740\" data-end=\"12817\"><strong data-start=\"12740\" data-end=\"12753\">&gt;1,000 kW<\/strong> with surplus export: <strong data-start=\"12775\" data-end=\"12808\">Electricity Operation License<\/strong> required<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"12819\" data-end=\"12843\">Surplus Power Policy<\/h3>\n<p data-start=\"12845\" data-end=\"12879\">Under <strong data-start=\"12851\" data-end=\"12876\">Decree 135\/2024\/N\u0110-CP<\/strong>:<\/p>\n<ul data-start=\"12880\" data-end=\"13208\">\n<li data-start=\"12880\" data-end=\"12959\">\n<p data-start=\"12882\" data-end=\"12959\"><strong data-start=\"12882\" data-end=\"12902\">Self-consumption<\/strong> is strongly encouraged; it directly reduces your bill.<\/p>\n<\/li>\n<li data-start=\"12960\" data-end=\"13113\">\n<p data-start=\"12962\" data-end=\"13113\"><strong data-start=\"12962\" data-end=\"12986\">Surplus sold to EVN:<\/strong> purchased at the <strong data-start=\"13004\" data-end=\"13063\">average retail electricity price (FMP) published by EVN<\/strong>, or per agreement between the customer and EVN.<\/p>\n<\/li>\n<li data-start=\"13114\" data-end=\"13208\">\n<p data-start=\"13116\" data-end=\"13208\"><strong data-start=\"13116\" data-end=\"13140\">Bidirectional meter:<\/strong> records both import and export; monthly netting\/settlement applies.<\/p>\n<\/li>\n<\/ul>\n<blockquote data-start=\"13210\" data-end=\"13359\">\n<p data-start=\"13212\" data-end=\"13359\">Note: Surplus purchase prices are typically lower than upper residential tiers; it\u2019s best to <strong data-start=\"13305\" data-end=\"13334\">optimize self-consumption<\/strong> rather than over-export.<\/p>\n<\/blockquote>\n<hr data-start=\"13361\" data-end=\"13364\" \/>\n<h2 data-start=\"13366\" data-end=\"13418\">Mandatory Technical Standards During Construction<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14166\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-2.jpg\" alt=\"\" width=\"2048\" height=\"1076\" title=\"\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-2.jpg 2048w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-2-768x404.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-2-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-2-600x315.jpg 600w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<h3 data-start=\"13420\" data-end=\"13451\">Vietnamese Standards (TCVN)<\/h3>\n<ul data-start=\"13453\" data-end=\"13804\">\n<li data-start=\"13453\" data-end=\"13576\">\n<p data-start=\"13455\" data-end=\"13576\"><strong data-start=\"13455\" data-end=\"13479\">TCVN 7447-7-712:2019<\/strong> \u2014 PV system installation requirements: insulation, earthing, cable sizing, protection devices.<\/p>\n<\/li>\n<li data-start=\"13577\" data-end=\"13673\">\n<p data-start=\"13579\" data-end=\"13673\"><strong data-start=\"13579\" data-end=\"13598\">TCVN 12232:2018<\/strong> \u2014 PV module safety: mechanical strength, thermal resistance, insulation.<\/p>\n<\/li>\n<li data-start=\"13674\" data-end=\"13804\">\n<p data-start=\"13676\" data-end=\"13804\"><strong data-start=\"13676\" data-end=\"13696\">QCVN 01:2020\/BCT<\/strong> \u2014 Electrical safety across generation to consumption. Non-compliance can result in penalties or suspension.<\/p>\n<\/li>\n<\/ul>\n<blockquote data-start=\"13806\" data-end=\"13984\">\n<p data-start=\"13808\" data-end=\"13984\"><strong data-start=\"13808\" data-end=\"13817\">Note:<\/strong> TCVN 7447-7-712:2019 (<strong data-start=\"13840\" data-end=\"13864\">IEC 60364-7-712:2017<\/strong>) supersedes the 2015 version. Legacy projects built to 2015 may be recognized, but <strong data-start=\"13948\" data-end=\"13983\">new projects should follow 2019<\/strong>.<\/p>\n<\/blockquote>\n<h3 data-start=\"13986\" data-end=\"14019\">International Standards (IEC)<\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"14021\" data-end=\"14342\">\n<thead data-start=\"14021\" data-end=\"14066\">\n<tr data-start=\"14021\" data-end=\"14066\">\n<th data-start=\"14021\" data-end=\"14032\" data-col-size=\"sm\">Standard<\/th>\n<th data-start=\"14032\" data-end=\"14045\" data-col-size=\"sm\">Applies to<\/th>\n<th data-start=\"14045\" data-end=\"14066\" data-col-size=\"sm\">Core requirements<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"14081\" data-end=\"14342\">\n<tr data-start=\"14081\" data-end=\"14145\">\n<td data-start=\"14081\" data-end=\"14097\" data-col-size=\"sm\"><strong data-start=\"14083\" data-end=\"14096\">IEC 61215<\/strong><\/td>\n<td data-start=\"14097\" data-end=\"14107\" data-col-size=\"sm\">Modules<\/td>\n<td data-start=\"14107\" data-end=\"14145\" data-col-size=\"sm\">Quality &amp; environmental durability<\/td>\n<\/tr>\n<tr data-start=\"14146\" data-end=\"14211\">\n<td data-start=\"14146\" data-end=\"14162\" data-col-size=\"sm\"><strong data-start=\"14148\" data-end=\"14161\">IEC 61730<\/strong><\/td>\n<td data-start=\"14162\" data-end=\"14172\" data-col-size=\"sm\">Modules<\/td>\n<td data-start=\"14172\" data-end=\"14211\" data-col-size=\"sm\">Electrical safety &amp; fire resistance<\/td>\n<\/tr>\n<tr data-start=\"14212\" data-end=\"14273\">\n<td data-start=\"14212\" data-end=\"14228\" data-col-size=\"sm\"><strong data-start=\"14214\" data-end=\"14227\">IEC 62109<\/strong><\/td>\n<td data-start=\"14228\" data-end=\"14240\" data-col-size=\"sm\">Inverters<\/td>\n<td data-start=\"14240\" data-end=\"14273\" data-col-size=\"sm\">Electrical safety &amp; isolation<\/td>\n<\/tr>\n<tr data-start=\"14274\" data-end=\"14342\">\n<td data-start=\"14274\" data-end=\"14290\" data-col-size=\"sm\"><strong data-start=\"14276\" data-end=\"14289\">IEC 61727<\/strong><\/td>\n<td data-start=\"14290\" data-end=\"14302\" data-col-size=\"sm\">Inverters<\/td>\n<td data-start=\"14302\" data-end=\"14342\" data-col-size=\"sm\">Grid-interconnection characteristics<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"14344\" data-end=\"14387\"><strong data-start=\"14344\" data-end=\"14387\">How to verify compliance (label\/CO\/CQ):<\/strong><\/p>\n<ul data-start=\"14388\" data-end=\"14585\">\n<li data-start=\"14388\" data-end=\"14440\">\n<p data-start=\"14390\" data-end=\"14440\">Standard code (e.g., <strong data-start=\"14411\" data-end=\"14429\">IEC 61215:2021<\/strong>) present<\/p>\n<\/li>\n<li data-start=\"14441\" data-end=\"14492\">\n<p data-start=\"14443\" data-end=\"14492\">Recognized certification body (T\u00dcV, SGS, UL, \u2026)<\/p>\n<\/li>\n<li data-start=\"14493\" data-end=\"14516\">\n<p data-start=\"14495\" data-end=\"14516\">Valid issuance date<\/p>\n<\/li>\n<li data-start=\"14517\" data-end=\"14551\">\n<p data-start=\"14519\" data-end=\"14551\">Serial\/model matches datasheet<\/p>\n<\/li>\n<li data-start=\"14552\" data-end=\"14585\">\n<p data-start=\"14554\" data-end=\"14585\">QR code for online verification<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"14587\" data-end=\"14590\" \/>\n<h2 data-start=\"14592\" data-end=\"14619\">2025 Solar Project Costs<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14170\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-3.jpg\" alt=\"\" width=\"2048\" height=\"1076\" title=\"\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-3.jpg 2048w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-3-768x404.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-3-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-3-600x315.jpg 600w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/p>\n<h3 data-start=\"14621\" data-end=\"14654\">Stage-by-Stage Cost Breakdown<\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"14656\" data-end=\"15014\">\n<thead data-start=\"14656\" data-end=\"14695\">\n<tr data-start=\"14656\" data-end=\"14695\">\n<th data-start=\"14656\" data-end=\"14664\" data-col-size=\"sm\">Stage<\/th>\n<th data-start=\"14664\" data-end=\"14677\" data-col-size=\"sm\">% of Total<\/th>\n<th data-start=\"14677\" data-end=\"14695\" data-col-size=\"sm\">Estimated Cost<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"14711\" data-end=\"15014\">\n<tr data-start=\"14711\" data-end=\"14767\">\n<td data-start=\"14711\" data-end=\"14733\" data-col-size=\"sm\"><strong data-start=\"14713\" data-end=\"14732\">Survey &amp; Design<\/strong><\/td>\n<td data-start=\"14733\" data-end=\"14738\" data-col-size=\"sm\">5%<\/td>\n<td data-start=\"14738\" data-end=\"14767\" data-col-size=\"sm\"><strong data-start=\"14740\" data-end=\"14765\">0.5\u20131 million VND\/kWp<\/strong><\/td>\n<\/tr>\n<tr data-start=\"14768\" data-end=\"14844\">\n<td data-start=\"14768\" data-end=\"14810\" data-col-size=\"sm\"><strong data-start=\"14770\" data-end=\"14809\">Equipment (Modules, Inverters, BOS)<\/strong><\/td>\n<td data-start=\"14810\" data-end=\"14816\" data-col-size=\"sm\">70%<\/td>\n<td data-start=\"14816\" data-end=\"14844\" data-col-size=\"sm\"><strong data-start=\"14818\" data-end=\"14842\">7\u201310 million VND\/kWp<\/strong><\/td>\n<\/tr>\n<tr data-start=\"14845\" data-end=\"14897\">\n<td data-start=\"14845\" data-end=\"14864\" data-col-size=\"sm\"><strong data-start=\"14847\" data-end=\"14863\">Installation<\/strong><\/td>\n<td data-start=\"14864\" data-end=\"14870\" data-col-size=\"sm\">20%<\/td>\n<td data-start=\"14870\" data-end=\"14897\" data-col-size=\"sm\"><strong data-start=\"14872\" data-end=\"14895\">2\u20133 million VND\/kWp<\/strong><\/td>\n<\/tr>\n<tr data-start=\"14898\" data-end=\"14965\">\n<td data-start=\"14898\" data-end=\"14931\" data-col-size=\"sm\"><strong data-start=\"14900\" data-end=\"14930\">Acceptance &amp; Documentation<\/strong><\/td>\n<td data-start=\"14931\" data-end=\"14936\" data-col-size=\"sm\">5%<\/td>\n<td data-start=\"14936\" data-end=\"14965\" data-col-size=\"sm\"><strong data-start=\"14938\" data-end=\"14963\">0.5\u20131 million VND\/kWp<\/strong><\/td>\n<\/tr>\n<tr data-start=\"14966\" data-end=\"15014\">\n<td data-start=\"14966\" data-end=\"14978\" data-col-size=\"sm\"><strong data-start=\"14968\" data-end=\"14977\">Total<\/strong><\/td>\n<td data-start=\"14978\" data-end=\"14985\" data-col-size=\"sm\">100%<\/td>\n<td data-start=\"14985\" data-end=\"15014\" data-col-size=\"sm\"><strong data-start=\"14987\" data-end=\"15012\">10\u201315 million VND\/kWp<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"15016\" data-end=\"15035\"><strong data-start=\"15016\" data-end=\"15033\">Cost drivers:<\/strong><\/p>\n<ul data-start=\"15036\" data-end=\"15211\">\n<li data-start=\"15036\" data-end=\"15103\">\n<p data-start=\"15038\" data-end=\"15103\">Equipment tier (Tier-1 typically <strong data-start=\"15071\" data-end=\"15081\">15\u201320%<\/strong> higher than Tier-2)<\/p>\n<\/li>\n<li data-start=\"15104\" data-end=\"15158\">\n<p data-start=\"15106\" data-end=\"15158\">Roof complexity (tile &gt; metal in labor difficulty)<\/p>\n<\/li>\n<li data-start=\"15159\" data-end=\"15211\">\n<p data-start=\"15161\" data-end=\"15211\">Scale (larger projects achieve lower cost per kWp)<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"15213\" data-end=\"15248\">Hidden\/Ancillary Costs to Watch<\/h3>\n<ul data-start=\"15250\" data-end=\"15902\">\n<li data-start=\"15250\" data-end=\"15512\">\n<p data-start=\"15252\" data-end=\"15298\"><strong data-start=\"15252\" data-end=\"15281\">Administrative procedures<\/strong> by size class:<\/p>\n<ul data-start=\"15301\" data-end=\"15512\">\n<li data-start=\"15301\" data-end=\"15348\">\n<p data-start=\"15303\" data-end=\"15348\"><strong data-start=\"15303\" data-end=\"15315\">&lt;100 kW:<\/strong> Notification only \u2014 <strong data-start=\"15336\" data-end=\"15346\">no fee<\/strong><\/p>\n<\/li>\n<li data-start=\"15351\" data-end=\"15425\">\n<p data-start=\"15353\" data-end=\"15425\"><strong data-start=\"15353\" data-end=\"15370\">100\u20131,000 kW:<\/strong> Registration &amp; design dossier \u2014 <strong data-start=\"15403\" data-end=\"15423\">local fees apply<\/strong><\/p>\n<\/li>\n<li data-start=\"15428\" data-end=\"15512\">\n<p data-start=\"15430\" data-end=\"15512\"><strong data-start=\"15430\" data-end=\"15443\">\u22651,000 kW<\/strong> (surplus export): Electricity Operation License \u2014 <strong data-start=\"15494\" data-end=\"15512\">regulated fees<\/strong><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li data-start=\"15514\" data-end=\"15607\">\n<p data-start=\"15516\" data-end=\"15607\"><strong data-start=\"15516\" data-end=\"15553\">Bidirectional meter installation:<\/strong> <strong data-start=\"15554\" data-end=\"15562\">Free<\/strong> (EVN covers per <strong data-start=\"15579\" data-end=\"15604\">Decree 135\/2024\/N\u0110-CP<\/strong>)<\/p>\n<\/li>\n<li data-start=\"15608\" data-end=\"15717\">\n<p data-start=\"15610\" data-end=\"15717\"><strong data-start=\"15610\" data-end=\"15636\">Possible local extras:<\/strong> e.g., <strong data-start=\"15643\" data-end=\"15665\">electrical cabinet<\/strong> relocation\/upgrades \u2014 confirm with local EVN unit<\/p>\n<\/li>\n<li data-start=\"15718\" data-end=\"15803\">\n<p data-start=\"15720\" data-end=\"15803\"><strong data-start=\"15720\" data-end=\"15747\">Construction insurance:<\/strong> <strong data-start=\"15748\" data-end=\"15758\">0.5\u20131%<\/strong> of project value (varies by insurer\/scale)<\/p>\n<\/li>\n<li data-start=\"15804\" data-end=\"15902\">\n<p data-start=\"15806\" data-end=\"15902\"><strong data-start=\"15806\" data-end=\"15836\">Technical inspection fees:<\/strong> often for <strong data-start=\"15847\" data-end=\"15861\">\u2265500 kW AC<\/strong> projects (structure, electrical, safety)<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"15904\" data-end=\"15907\" \/>\n<h2 data-start=\"15909\" data-end=\"15925\">ROI &amp; Payback<\/h2>\n<p data-start=\"15927\" data-end=\"15989\"><strong data-start=\"15927\" data-end=\"15989\">Payback Period (years) = Total Investment \u00f7 Annual Savings<\/strong><\/p>\n<p data-start=\"15991\" data-end=\"16036\"><strong data-start=\"15991\" data-end=\"16034\">Example (South, 100 kWp DC \u2248 90 kW AC):<\/strong><\/p>\n<ul data-start=\"16037\" data-end=\"16308\">\n<li data-start=\"16037\" data-end=\"16109\">\n<p data-start=\"16039\" data-end=\"16109\">Investment: <strong data-start=\"16051\" data-end=\"16070\">1.2 billion VND<\/strong> (= <strong data-start=\"16074\" data-end=\"16106\">12 million VND\/kWp \u00d7 100 kWp<\/strong>)<\/p>\n<\/li>\n<li data-start=\"16110\" data-end=\"16185\">\n<p data-start=\"16112\" data-end=\"16185\">Annual yield: <strong data-start=\"16126\" data-end=\"16141\">130,000 kWh<\/strong> (regional factor ~<strong data-start=\"16160\" data-end=\"16182\">1,300 kWh\/kWp\/year<\/strong>)<\/p>\n<\/li>\n<li data-start=\"16186\" data-end=\"16308\">\n<p data-start=\"16188\" data-end=\"16308\">Average tariff (industrial ref.): <strong data-start=\"16222\" data-end=\"16239\">2,500 VND\/kWh<\/strong> <em data-start=\"16240\" data-end=\"16308\">(actual bills vary by customer type, TOU tiering, and usage bands)<\/em><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"16310\" data-end=\"16410\"><strong data-start=\"16310\" data-end=\"16329\">Annual savings:<\/strong> <strong data-start=\"16330\" data-end=\"16367\">130,000 \u00d7 2,500 = 325 million VND<\/strong><br data-start=\"16367\" data-end=\"16370\" \/><strong data-start=\"16370\" data-end=\"16382\">Payback:<\/strong> <strong data-start=\"16383\" data-end=\"16410\">1,200 \/ 325 \u2248 3.7 years<\/strong><\/p>\n<p data-start=\"16412\" data-end=\"16511\">Over <strong data-start=\"16417\" data-end=\"16429\">25 years<\/strong> of system life, <strong data-start=\"16446\" data-end=\"16460\">net profit<\/strong> can reach <strong data-start=\"16471\" data-end=\"16490\">6\u20137 billion VND<\/strong> (after maintenance).<\/p>\n<hr data-start=\"16513\" data-end=\"16516\" \/>\n<h2 data-start=\"16518\" data-end=\"16554\">Common Issues During Construction<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-14174\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-4.jpg\" alt=\"\" width=\"2048\" height=\"1076\" title=\"\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-4.jpg 2048w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-4-768x404.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-4-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/02\/nhan-vien-vrenergy-4-600x315.jpg 600w\" sizes=\"auto, (max-width: 2048px) 100vw, 2048px\" \/><\/h2>\n<h3 data-start=\"16556\" data-end=\"16583\">Top 5 Issues &amp; Remedies<\/h3>\n<ol data-start=\"16585\" data-end=\"17472\">\n<li data-start=\"16585\" data-end=\"16787\">\n<p data-start=\"16588\" data-end=\"16787\"><strong data-start=\"16588\" data-end=\"16623\">Insufficient roof load capacity<\/strong><br data-start=\"16623\" data-end=\"16626\" \/><em data-start=\"16629\" data-end=\"16635\">Fix:<\/em> Reinforce steel structure or reduce module count using higher-power modules to maintain target capacity. <strong data-start=\"16741\" data-end=\"16759\">Reinforcement:<\/strong> <strong data-start=\"16760\" data-end=\"16786\">200,000\u2013500,000 VND\/m\u00b2<\/strong>.<\/p>\n<\/li>\n<li data-start=\"16789\" data-end=\"16960\">\n<p data-start=\"16792\" data-end=\"16960\"><strong data-start=\"16792\" data-end=\"16824\">Shading from trees\/buildings<\/strong><br data-start=\"16824\" data-end=\"16827\" \/><em data-start=\"16830\" data-end=\"16836\">Fix:<\/em> Use <strong data-start=\"16841\" data-end=\"16855\">optimizers<\/strong> (Tigo, SolarEdge) or redesign layout to avoid shade. <strong data-start=\"16909\" data-end=\"16928\">Optimizer cost:<\/strong> <strong data-start=\"16929\" data-end=\"16959\">500,000\u2013800,000 VND\/module<\/strong>.<\/p>\n<\/li>\n<li data-start=\"16962\" data-end=\"17124\">\n<p data-start=\"16965\" data-end=\"17124\"><strong data-start=\"16965\" data-end=\"16989\">Inverter won\u2019t start<\/strong><br data-start=\"16989\" data-end=\"16992\" \/><em data-start=\"16995\" data-end=\"17004\">Causes:<\/em> Low DC voltage, grounding faults, over-temperature. Re-check wiring, measure per string, ensure cool installation site.<\/p>\n<\/li>\n<li data-start=\"17126\" data-end=\"17307\">\n<p data-start=\"17129\" data-end=\"17307\"><strong data-start=\"17129\" data-end=\"17161\">Roof leaks post-installation<\/strong><br data-start=\"17161\" data-end=\"17164\" \/><em data-start=\"17167\" data-end=\"17180\">Prevention:<\/em> Specialty sealants; avoid deep penetrations into waterproofing layers. <em data-start=\"17252\" data-end=\"17258\">Fix:<\/em> Remove local modules, repair thoroughly, reseal.<\/p>\n<\/li>\n<li data-start=\"17309\" data-end=\"17472\">\n<p data-start=\"17312\" data-end=\"17472\"><strong data-start=\"17312\" data-end=\"17342\">Underperformance vs. model<\/strong><br data-start=\"17342\" data-end=\"17345\" \/><em data-start=\"17348\" data-end=\"17357\">Causes:<\/em> Unaccounted shading; soiling (<strong data-start=\"17388\" data-end=\"17397\">5\u201310%<\/strong> loss); inverter thermal derating; undersized conductors; non-optimal tilt.<\/p>\n<\/li>\n<\/ol>\n<h3 data-start=\"17474\" data-end=\"17503\">When to Call a Technician<\/h3>\n<p data-start=\"17505\" data-end=\"17523\">Seven red flags:<\/p>\n<ul data-start=\"17524\" data-end=\"17764\">\n<li data-start=\"17524\" data-end=\"17559\">\n<p data-start=\"17526\" data-end=\"17559\">Persistent inverter error codes<\/p>\n<\/li>\n<li data-start=\"17560\" data-end=\"17602\">\n<p data-start=\"17562\" data-end=\"17602\">Output drops <strong data-start=\"17575\" data-end=\"17583\">&gt;20%<\/strong> vs. typical days<\/p>\n<\/li>\n<li data-start=\"17603\" data-end=\"17637\">\n<p data-start=\"17605\" data-end=\"17637\">Inverter temperature <strong data-start=\"17626\" data-end=\"17635\">&gt;70\u00b0C<\/strong><\/p>\n<\/li>\n<li data-start=\"17638\" data-end=\"17655\">\n<p data-start=\"17640\" data-end=\"17655\">Burning smell<\/p>\n<\/li>\n<li data-start=\"17656\" data-end=\"17689\">\n<p data-start=\"17658\" data-end=\"17689\">Overheating\/discolored cables<\/p>\n<\/li>\n<li data-start=\"17690\" data-end=\"17720\">\n<p data-start=\"17692\" data-end=\"17720\">Meter not recording energy<\/p>\n<\/li>\n<li data-start=\"17721\" data-end=\"17764\">\n<p data-start=\"17723\" data-end=\"17764\">System fails to restart after grid outage<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"17766\" data-end=\"17769\" \/>\n<h2 data-start=\"17771\" data-end=\"17788\">Post-Build O&amp;M<\/h2>\n<h3 data-start=\"17790\" data-end=\"17809\">Warranty Matrix<\/h3>\n<div class=\"_tableContainer_1rjym_1\">\n<div class=\"group _tableWrapper_1rjym_13 flex w-fit flex-col-reverse\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"17811\" data-end=\"18176\">\n<thead data-start=\"17811\" data-end=\"17843\">\n<tr data-start=\"17811\" data-end=\"17843\">\n<th data-start=\"17811\" data-end=\"17823\" data-col-size=\"sm\">Component<\/th>\n<th data-start=\"17823\" data-end=\"17834\" data-col-size=\"sm\">Warranty<\/th>\n<th data-start=\"17834\" data-end=\"17843\" data-col-size=\"md\">Notes<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"17858\" data-end=\"18176\">\n<tr data-start=\"17858\" data-end=\"17920\">\n<td data-start=\"17858\" data-end=\"17872\" data-col-size=\"sm\"><strong data-start=\"17860\" data-end=\"17871\">Modules<\/strong><\/td>\n<td data-start=\"17872\" data-end=\"17885\" data-col-size=\"sm\"><strong data-start=\"17874\" data-end=\"17884\">25 yrs<\/strong><\/td>\n<td data-start=\"17885\" data-end=\"17920\" data-col-size=\"md\">Power loss <strong data-start=\"17898\" data-end=\"17906\">&lt;20%<\/strong> vs. initial<\/td>\n<\/tr>\n<tr data-start=\"17921\" data-end=\"18000\">\n<td data-start=\"17921\" data-end=\"17936\" data-col-size=\"sm\"><strong data-start=\"17923\" data-end=\"17935\">Inverter<\/strong><\/td>\n<td data-start=\"17936\" data-end=\"17951\" data-col-size=\"sm\"><strong data-start=\"17938\" data-end=\"17950\">5\u201310 yrs<\/strong><\/td>\n<td data-start=\"17951\" data-end=\"18000\" data-col-size=\"md\">Manufacturing defects; force majeure excluded<\/td>\n<\/tr>\n<tr data-start=\"18001\" data-end=\"18081\">\n<td data-start=\"18001\" data-end=\"18015\" data-col-size=\"sm\"><strong data-start=\"18003\" data-end=\"18014\">Racking<\/strong><\/td>\n<td data-start=\"18015\" data-end=\"18031\" data-col-size=\"sm\"><strong data-start=\"18017\" data-end=\"18030\">15\u201320 yrs<\/strong><\/td>\n<td data-start=\"18031\" data-end=\"18081\" data-col-size=\"md\">Corrosion\/deformation from workmanship defects<\/td>\n<\/tr>\n<tr data-start=\"18082\" data-end=\"18176\">\n<td data-start=\"18082\" data-end=\"18113\" data-col-size=\"sm\"><strong data-start=\"18084\" data-end=\"18112\">Installation workmanship<\/strong><\/td>\n<td data-start=\"18113\" data-end=\"18127\" data-col-size=\"sm\"><strong data-start=\"18115\" data-end=\"18126\">2\u20135 yrs<\/strong><\/td>\n<td data-start=\"18127\" data-end=\"18176\" data-col-size=\"md\">Leaks, performance loss due to install errors<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h3 data-start=\"18178\" data-end=\"18213\">Preventive Maintenance Schedule<\/h3>\n<p data-start=\"18215\" data-end=\"18577\"><strong data-start=\"18215\" data-end=\"18237\">Monthly \u2014 via App:<\/strong> track daily yield, compare YoY\/seasonal, check alarms.<br data-start=\"18292\" data-end=\"18295\" \/><strong data-start=\"18295\" data-end=\"18327\">Quarterly \u2014 module cleaning:<\/strong> cool hours (6\u20137 am or 5\u20136 pm); clean water + soft brush\/low-pressure spray; <strong data-start=\"18404\" data-end=\"18426\">no harsh chemicals<\/strong>.<br data-start=\"18427\" data-end=\"18430\" \/><strong data-start=\"18430\" data-end=\"18461\">Annually \u2014 full inspection:<\/strong> fasteners &amp; racking, per-string V\/I checks, insulation &amp; earth resistance, inverter cleaning\/fans, cable condition.<\/p>\n<p data-start=\"18579\" data-end=\"18760\"><strong data-start=\"18579\" data-end=\"18599\">Annual O&amp;M cost:<\/strong> <strong data-start=\"18600\" data-end=\"18610\">0.5\u20131%<\/strong> of system value.<br data-start=\"18627\" data-end=\"18630\" \/>Example: <strong data-start=\"18639\" data-end=\"18649\">100 kW<\/strong> system worth <strong data-start=\"18663\" data-end=\"18682\">1.2 billion VND<\/strong> \u2192 <strong data-start=\"18685\" data-end=\"18710\">6\u201312 million VND\/year<\/strong> (cleaning, minor replacements, technical checks).<\/p>\n<hr data-start=\"18762\" data-end=\"18765\" \/>\n<h2 data-start=\"18767\" data-end=\"18804\">Choosing a Reliable EPC Contractor<\/h2>\n<h3 data-start=\"18806\" data-end=\"18829\">10 Quality Criteria<\/h3>\n<ul data-start=\"18830\" data-end=\"19357\">\n<li data-start=\"18830\" data-end=\"18920\">\n<p data-start=\"18832\" data-end=\"18920\">Appropriate competency certificates (e.g., <strong data-start=\"18875\" data-end=\"18887\">ISO 9001<\/strong>, licensed design\/construction)<\/p>\n<\/li>\n<li data-start=\"18921\" data-end=\"18954\">\n<p data-start=\"18923\" data-end=\"18954\"><strong data-start=\"18923\" data-end=\"18935\">\u22655 years<\/strong> solar experience<\/p>\n<\/li>\n<li data-start=\"18955\" data-end=\"19019\">\n<p data-start=\"18957\" data-end=\"19019\">Portfolio of <strong data-start=\"18970\" data-end=\"18996\">50+ completed projects<\/strong> with verifiable info<\/p>\n<\/li>\n<li data-start=\"19020\" data-end=\"19078\">\n<p data-start=\"19022\" data-end=\"19078\"><strong data-start=\"19022\" data-end=\"19038\">Case studies<\/strong> with real photos and performance data<\/p>\n<\/li>\n<li data-start=\"19079\" data-end=\"19128\">\n<p data-start=\"19081\" data-end=\"19128\">Partnerships with <strong data-start=\"19099\" data-end=\"19109\">Tier-1<\/strong> equipment brands<\/p>\n<\/li>\n<li data-start=\"19129\" data-end=\"19191\">\n<p data-start=\"19131\" data-end=\"19191\"><strong data-start=\"19131\" data-end=\"19142\">25-year<\/strong> module warranty; <strong data-start=\"19160\" data-end=\"19171\">\u22655-year<\/strong> inverter warranty<\/p>\n<\/li>\n<li data-start=\"19192\" data-end=\"19233\">\n<p data-start=\"19194\" data-end=\"19233\">Full support for <strong data-start=\"19211\" data-end=\"19231\">EVN registration<\/strong><\/p>\n<\/li>\n<li data-start=\"19234\" data-end=\"19274\">\n<p data-start=\"19236\" data-end=\"19274\">Clear post-handover maintenance plan<\/p>\n<\/li>\n<li data-start=\"19275\" data-end=\"19315\">\n<p data-start=\"19277\" data-end=\"19315\"><strong data-start=\"19277\" data-end=\"19302\">Transparent, itemized<\/strong> quotations<\/p>\n<\/li>\n<li data-start=\"19316\" data-end=\"19357\">\n<p data-start=\"19318\" data-end=\"19357\">Fast responses; professional consulting<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"19359\" data-end=\"19381\">Red Flags to Avoid<\/h3>\n<ul data-start=\"19382\" data-end=\"19617\">\n<li data-start=\"19382\" data-end=\"19414\">\n<p data-start=\"19384\" data-end=\"19414\">Quotes <strong data-start=\"19391\" data-end=\"19399\">&gt;20%<\/strong> below market<\/p>\n<\/li>\n<li data-start=\"19415\" data-end=\"19452\">\n<p data-start=\"19417\" data-end=\"19452\">No fixed office or proper website<\/p>\n<\/li>\n<li data-start=\"19453\" data-end=\"19488\">\n<p data-start=\"19455\" data-end=\"19488\">No clear equipment certificates<\/p>\n<\/li>\n<li data-start=\"19489\" data-end=\"19540\">\n<p data-start=\"19491\" data-end=\"19540\">Unrealistic ROI promises (<strong data-start=\"19517\" data-end=\"19537\">payback &lt;3 years<\/strong>)<\/p>\n<\/li>\n<li data-start=\"19541\" data-end=\"19589\">\n<p data-start=\"19543\" data-end=\"19589\">Vague contracts; request <strong data-start=\"19568\" data-end=\"19587\">100% prepayment<\/strong><\/p>\n<\/li>\n<li data-start=\"19590\" data-end=\"19617\">\n<p data-start=\"19592\" data-end=\"19617\">No construction insurance<\/p>\n<\/li>\n<\/ul>\n<hr data-start=\"19619\" data-end=\"19622\" \/>\n<h2 data-start=\"19624\" data-end=\"19650\">Conclusion &amp; Next Steps<\/h2>\n<p data-start=\"19652\" data-end=\"19855\">A standardized <strong data-start=\"19667\" data-end=\"19674\">EPC<\/strong> workflow ensures methodical execution, lower risk, and optimized costs. With the <strong data-start=\"19756\" data-end=\"19767\">6 steps<\/strong> from survey to handover, a <strong data-start=\"19795\" data-end=\"19810\">3\u20134.5 month<\/strong> timeline is reasonable for a quality system.<\/p>\n<p data-start=\"19857\" data-end=\"20117\"><strong data-start=\"19857\" data-end=\"19875\">Policy update:<\/strong> Alongside <strong data-start=\"19886\" data-end=\"19911\">Decree 135\/2024\/N\u0110-CP<\/strong>, <strong data-start=\"19913\" data-end=\"19937\">Decree 58\/2025\/N\u0110-CP<\/strong> (2025) promotes renewables and introduces additional incentives for rooftop PV. Check with your <strong data-start=\"20034\" data-end=\"20076\">local Department of Industry and Trade<\/strong> for the current incentives in your area.<\/p>\n<h3 data-start=\"20119\" data-end=\"20150\">Final Pre-Project Checklist<\/h3>\n<p data-start=\"20152\" data-end=\"20168\"><strong data-start=\"20152\" data-end=\"20168\">Preparation:<\/strong><\/p>\n<ul data-start=\"20169\" data-end=\"20378\">\n<li data-start=\"20169\" data-end=\"20219\">\n<p data-start=\"20171\" data-end=\"20219\">Gather last <strong data-start=\"20183\" data-end=\"20196\">12 months<\/strong> of electricity bills<\/p>\n<\/li>\n<li data-start=\"20220\" data-end=\"20266\">\n<p data-start=\"20222\" data-end=\"20266\">Confirm roof load capacity (<strong data-start=\"20250\" data-end=\"20263\">\u226530 kg\/m\u00b2<\/strong>)<\/p>\n<\/li>\n<li data-start=\"20267\" data-end=\"20303\">\n<p data-start=\"20269\" data-end=\"20303\">Prepare budget or financing plan<\/p>\n<\/li>\n<li data-start=\"20304\" data-end=\"20331\">\n<p data-start=\"20306\" data-end=\"20331\">Verify usable roof area<\/p>\n<\/li>\n<li data-start=\"20332\" data-end=\"20378\">\n<p data-start=\"20334\" data-end=\"20378\">Choose system type (on-grid\/off-grid\/hybrid)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"20380\" data-end=\"20405\"><strong data-start=\"20380\" data-end=\"20405\">Contractor selection:<\/strong><\/p>\n<ul data-start=\"20406\" data-end=\"20591\">\n<li data-start=\"20406\" data-end=\"20448\">\n<p data-start=\"20408\" data-end=\"20448\">Compare at least <strong data-start=\"20425\" data-end=\"20446\">3 EPC contractors<\/strong><\/p>\n<\/li>\n<li data-start=\"20449\" data-end=\"20495\">\n<p data-start=\"20451\" data-end=\"20495\">Verify credentials, experience, references<\/p>\n<\/li>\n<li data-start=\"20496\" data-end=\"20542\">\n<p data-start=\"20498\" data-end=\"20542\">Review contract &amp; warranty terms carefully<\/p>\n<\/li>\n<li data-start=\"20543\" data-end=\"20591\">\n<p data-start=\"20545\" data-end=\"20591\">Confirm all equipment has clear certifications<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"20593\" data-end=\"20788\">Once you understand the full process, select an experienced <strong data-start=\"20653\" data-end=\"20660\">EPC<\/strong> partner to execute efficiently. Clarity on each step helps you supervise, ensure build quality, and maximize long-term returns.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Solar Project Construction Process: A Detailed 6-Step Guide &amp; 2025 Technical Standards \ud83d\udccb Quick Summary: The solar EPC process has 6 steps Site Survey &amp; Analysis (1\u20132 weeks) Detailed Design (2\u20133 weeks) Equipment Procurement (3\u20134 weeks) Installation &amp; Construction (1\u20133 weeks) Testing &amp; Acceptance (1 week) Handover &amp; EVN Registration: Systems &lt;100 kW: 3\u20134 weeks&#8230;<\/p>\n","protected":false},"author":1,"featured_media":14179,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-14129","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/posts\/14129","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/comments?post=14129"}],"version-history":[{"count":2,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/posts\/14129\/revisions"}],"predecessor-version":[{"id":14184,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/posts\/14129\/revisions\/14184"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/media\/14179"}],"wp:attachment":[{"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/media?parent=14129"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/categories?post=14129"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/tags?post=14129"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}