{"id":4449,"date":"2023-07-08T01:24:45","date_gmt":"2023-07-07T18:24:45","guid":{"rendered":"https:\/\/vrenergy.vn\/solar-power-basic-knowledge-of-electricity\/"},"modified":"2026-05-05T03:05:19","modified_gmt":"2026-05-04T20:05:19","slug":"solar-power-basic-knowledge-of-electricity","status":"publish","type":"post","link":"https:\/\/vrenergy.vn\/en\/solar-power-basic-knowledge-of-electricity\/","title":{"rendered":"Solar Power: Basic Knowledge of Electricity"},"content":{"rendered":"<p style=\"text-align: justify\"><span>Before officially starting with solar power, you need to understand basic knowledge about electricity, electrical concepts and quantities, voltage, current, resistance, capacity&#8230;<\/span><\/p>\n<p style=\"text-align: justify\"><span>Mastering these concepts and quantities, you will better understand the solar power system, helping you be more confident in\u00a0<\/span><b><span>the field of solar power<\/span><\/b><span>:<\/span><\/p>\n<ul style=\"text-align: justify\">\n<li><span>How to calculate energy<\/span><\/li>\n<li><b><span>Install solar power system<\/span><\/b><\/li>\n<\/ul>\n<h2 style=\"text-align: justify\"><span id=\"Tom_tat_ve_kien_thuc_co_ban_ve_dien\"><b><span>Summary of basic electrical knowledge<\/span><\/b><\/span><\/h2>\n<p style=\"text-align: justify\"><span>When talking about\u00a0<\/span><span><b>solar power<\/b>\u00a0, what do you think it is?\u00a0Is it\u00a0a battery system that stores electricity\u00a0?\u00a0<strong>Rooftop solar power<\/strong>\u00a0system\u00a0produces electricity?\u00a0Or\u00a0<b>home solar power system\u00a0<\/b>?<\/span><b><\/b><b><\/b><b><\/b><\/p>\n<p style=\"text-align: justify\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-3185 size-large\" title=\"Solar Power: Basic Knowledge of Electricity 4\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/08\/du-an-tong-thau-dien-mat-troi-emivest-feedmill-min-1024x538.jpg\" alt=\"you and tong thau dien with troi emivest feedmill min\" width=\"1024\" height=\"538\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/08\/du-an-tong-thau-dien-mat-troi-emivest-feedmill-min-1024x538.jpg 1024w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/08\/du-an-tong-thau-dien-mat-troi-emivest-feedmill-min-300x158.jpg 300w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/08\/du-an-tong-thau-dien-mat-troi-emivest-feedmill-min-768x403.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/08\/du-an-tong-thau-dien-mat-troi-emivest-feedmill-min-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/08\/du-an-tong-thau-dien-mat-troi-emivest-feedmill-min-2048x1076.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p style=\"text-align: justify\"><span>The term \u201celectricity\u201d covers a wide range of physical knowledge, all related but always distinct.\u00a0Some key quantities include charge, current, voltage, and electrons:<\/span><\/p>\n<ul style=\"text-align: justify\">\n<li><b><span>Charge\u00a0<\/span><\/b><span>is the accumulation of electrical energy, the unit of measurement is coulomb.\u00a0In nature, you can charge in the form of static electricity or lightning.\u00a0Batteries store electric charge.<\/span><\/li>\n<li><b><span>Electric current\u00a0<\/span><\/b><span>is the flow of electrical charges, for example through a wire, the unit of measurement is ampere.<\/span><\/li>\n<li><b><span>Voltage\u00a0<\/span><\/b><span>is the difference in electrical energy between two points, such as between the positive and negative terminals of a battery.\u00a0Electric potential (also called voltage), is measured in units of volts.<\/span><\/li>\n<li><b><span>Electromagnetism\u00a0<\/span><\/b><span>is the relationship between electricity and magnetism, allowing the generation of electricity from mechanical energy (such as a generator) and the generation of mechanical energy from electricity, such as an electric motor.<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify\"><span id=\"Cac_dai_luong_co_ban_lien_quan_den_dien_mat_troi\"><b><span>Basic quantities related to solar power<\/span><\/b><\/span><\/h2>\n<ul style=\"text-align: justify\">\n<li><strong><span>Voltage<\/span><\/strong><span>\u00a0is often understood as the potential difference between two points.\u00a0For example, AA batteries: voltage is the potential difference between the positive and negative terminals of the battery.\u00a0The unit of voltage measurement is\u00a0<\/span><strong><span>volt<\/span><\/strong><span>\u00a0and has the symbol \u201c\u00a0<\/span><strong><span>V<\/span><\/strong><span>\u00a0\u201d.<\/span><\/li>\n<li><strong><span>Current<\/span><\/strong><span>\u00a0is the flow of electricity (electrons) in an electrical circuit;\u00a0<\/span><b><span>Current intensity\u00a0<\/span><\/b><span>has the symbol \u201c\u00a0<\/span><b><span>I\u00a0<\/span><\/b><span>\u201d and the unit is\u00a0<\/span><b><span>ampere\u00a0<\/span><\/b><span>(\u00a0<\/span><strong><span>A<\/span><\/strong><span>\u00a0).\u00a0If you check the power supply, the current is usually written on it.<\/span><\/li>\n<li><strong><span>Resistance<\/span><\/strong><span>\u00a0is the resistance to electric current in a material through which electric current passes.\u00a0<\/span><b><span>Resistance\u00a0<\/span><\/b><span>has the symbol &#8221;\u00a0<\/span><b><span>R\u00a0<\/span><\/b><span>&#8221; and the unit of measurement is\u00a0<\/span><b><span>ohm\u00a0<\/span><\/b><span>.<\/span><\/li>\n<li><b><span>Power\u00a0<\/span><\/b><span>is measured according to the energy conversion rate, the unit is watt (W) and the symbol is \u201cP\u201d.\u00a0Capacity in watts is often clearly stated on electronic devices (irons, electric stoves, air conditioners&#8230;).\u00a0<\/span><\/li>\n<li><b><span>Energy\u00a0<\/span><\/b><span>is considered the ability to do work: power multiplied by time.\u00a0Energy is denoted \u201c\u00a0<\/span><strong><span>E<\/span><\/strong><span>\u00a0\u201d, measured in joules\u00a0<\/span><strong><span>(one equal to one watt-second)<\/span><\/strong><span>\u00a0, but electricity is often calculated in watt-hours (Wh) or kilowatt-hours (kWh), with 1 kWh = 1000 Wh .<\/span><\/li>\n<\/ul>\n<h2 style=\"text-align: justify\"><span id=\"Quan_he_giua_cac_dai_luong_do_luong\"><b><span>Relationships between measuring quantities<\/span><\/b><\/span><\/h2>\n<h3 style=\"text-align: justify\"><span id=\"Dien_ap\"><b><span>Voltage<\/span><\/b><\/span><\/h3>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\"><span>Current x resistance = voltage<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\"><strong>I x R = V<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify\"><span>Voltage is equal to current multiplied by resistance.\u00a0This formula is the expression of Ohm&#8217;s Law.\u00a0Similar to power calculations, you can express this formula in many ways.\u00a0If you know the voltage and current, you can calculate the resistance.\u00a0If you know the voltage and resistance, you will easily calculate the current.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\"><span>Voltage\/resistance = current<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\"><strong>V \/ R = I<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 style=\"text-align: justify\"><span id=\"Cong_suat\"><strong><span>Wattage<\/span><\/strong><\/span><\/h3>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\"><span>Voltage x current = power<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\"><strong>V x I = P<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify\"><span>Power is measured in watts, which is voltage multiplied by current.\u00a0A 12-V circuit with 4 amp current has 48 watts (12 x 4 = 48).<\/span><\/p>\n<p style=\"text-align: justify\"><span>Based on this formula, you can calculate the voltage if you know the power and current;\u00a0and calculate the current, if voltage and power are known.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\"><span>Power\/current = voltage<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\"><strong>P \/ I = V<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify\"><span>For example: A 48W motor with 4A current will require 12V voltage.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\">48W \/ 4A = 12V<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\"><span>Current = Power \/ Voltage<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\"><strong>I = P \/ V<\/strong><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: justify\"><span>For example: A 48W motor with 12V power will consume 4A current.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\">48W \/ 12V = 4A<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"text-align: left\"><span>Power is also calculated by the square of the current multiplied by the resistance:<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<p style=\"text-align: center\"><span>Square of current x resistance<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p style=\"text-align: center\">I2\u00a0x R = P<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 style=\"text-align: left\"><span id=\"Nang_luong\"><b><span>Energy<\/span><\/b><\/span><\/h3>\n<p style=\"text-align: justify\"><span>Energy is a measure of power over time, writing the amount of power consumed or produced by a device, over a period of time, usually one hour.\u00a0In\u00a0<\/span><b><span>solar power systems\u00a0<\/span><\/b><span>, energy is measured in watt-hours (Wh) or kilowatt-hours (kWh).<\/span><\/p>\n<p style=\"text-align: justify\"><span>The device uses a capacity of 50W, will have an energy demand of 50Wh in one hour.\u00a0The latest technology solar battery will generate 450W in one hour, capable of providing 450Wh of energy.<\/span><\/p>\n<p style=\"text-align: justify\"><span>However,\u00a0<\/span><b><span>solar power\u00a0<\/span><\/b><span>will depend on variations in time, temperature, and weather conditions during the day.\u00a0A specialized quantity is needed for solar power systems:\u00a0<\/span><b><span>watt-peak ratio (Wp).<\/span><\/b><\/p>\n<p style=\"text-align: justify\"><span>So what is Wp rate?<\/span><\/p>\n<h2 style=\"text-align: justify\"><span id=\"Ty_suat_Wp\"><b><span>Wp rate<\/span><\/b><\/span><\/h2>\n<p style=\"text-align: justify\"><span>The Wp rate represents the power that the solar battery can produce, the Wp rate of that panel.\u00a0This is to emphasize the energy value a solar panel can produce and remind consumers that a panel with a 450W rating does not produce 450Wh of power at all times of the day.<\/span><\/p>\n<p style=\"text-align: justify\"><span>The above content provides you with basic knowledge about electricity.\u00a0If you want to add more knowledge about solar power systems or learn about the process of implementing\u00a0<\/span><a href=\"https:\/\/vrenergy.vn\/du-an-dien-mat-troi\/\"><strong><span>solar power projects<\/span><\/strong><\/a><span>\u00a0, you can learn more:<\/span><\/p>\n<ul style=\"text-align: justify\">\n<li><span>How to design a solar power system for a project<\/span><\/li>\n<li><span>How to install solar power system<\/span><\/li>\n<li><span>Solar power system maintenance process<\/span><\/li>\n<\/ul>\n<p style=\"text-align: justify\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-2809 size-large\" title=\"Solar Power: Basic Knowledge of Electricity 5\" src=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/05\/nhan-su-chuyen-mon-nhan-dien-thuong-hieu-min-1024x538.jpg\" alt=\"Receiving a minimally effective electronic device\" width=\"1024\" height=\"538\" srcset=\"https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/05\/nhan-su-chuyen-mon-nhan-dien-thuong-hieu-min-1024x538.jpg 1024w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/05\/nhan-su-chuyen-mon-nhan-dien-thuong-hieu-min-300x158.jpg 300w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/05\/nhan-su-chuyen-mon-nhan-dien-thuong-hieu-min-768x403.jpg 768w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/05\/nhan-su-chuyen-mon-nhan-dien-thuong-hieu-min-1536x807.jpg 1536w, https:\/\/vrenergy.vn\/wp-content\/uploads\/2023\/05\/nhan-su-chuyen-mon-nhan-dien-thuong-hieu-min-2048x1076.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p style=\"text-align: justify\"><span>Or if, you only plan to install\u00a0<\/span><a href=\"https:\/\/vrenergy.vn\/dien-mat-troi-gia-dinh\/\"><b><span>solar power at home<\/span><\/b><\/a><span>\u00a0, you need to pay attention to regulations on standards, technical specifications, and electrical safety.\u00a0You can consult professional issues with VREnergy&#8217;s technical support team so we can give you useful advice.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Before officially starting with solar power, you need to understand basic knowledge about electricity, electrical concepts and quantities, voltage, current, resistance, capacity&#8230; Mastering these concepts and quantities, you will better understand the solar power system, helping you be more confident in\u00a0the field of solar power: How to calculate energy Install solar power system Summary of&#8230;<\/p>\n","protected":false},"author":1,"featured_media":3207,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-4449","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\/4449","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=4449"}],"version-history":[{"count":1,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/posts\/4449\/revisions"}],"predecessor-version":[{"id":17006,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/posts\/4449\/revisions\/17006"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/media\/3207"}],"wp:attachment":[{"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/media?parent=4449"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/categories?post=4449"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vrenergy.vn\/en\/wp-json\/wp\/v2\/tags?post=4449"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}