What is a solar power system? Is it advisable to install a solar power system or not?

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Solar power is no longer a strange concept to users. Through the media, more or less the benefits of this energy source have become known to many people. However, to have the most detailed and complete view of the solar power system , the article below will help you learn and answer your long-standing questions. 

What is a solar power system?

A solar power system is a system that collects solar radiation through energy panels to convert sunlight directly into electricity. Currently, in an era where fossil energy sources are increasingly being overexploited, gradually depleted and the exploitation process has a great impact on the environment, solar power is a green, infinitely renewable energy source. . 

Dunlopillo solar power installation project in Thuan An, Binh Duong
Dunlopillo solar power system installation project in Thuan An, Binh Duong

This energy source is also extremely safe, does not produce CO2 gas and does not cost money during use. With those values, solar power is gradually replacing traditional energy sources such as oil, coal gas and bringing many values ​​to people.  

What does a solar energy system include?

What is special about the structure of a solar power system to convert solar radiation into a source of electricity for consumption? Let’s take a detailed look at each component in the system to answer the question most accurately!

A solar power system is composed of 4 basic parts.

Solar panels

Solar panels are parts that absorb and convert solar radiation into DC current. Therefore, these panels are often placed on racks and in places that can receive the most solar radiation.

A solar panel usually consists of 6 main parts. That is:

  • Front glass layer : Made of tempered glass, 2 – 4mm thick, helps protect Solar Cell from impact and impact from outside weather (temperature, sun, rain, dust, rain, hail below 2 .5cm). At the same time, this layer of glass is transparent, making light less reflective, and the panel’s ability to absorb solar radiation well.
  • Eva layer (ethylene vinyl acetate, glass binder) : Consists of 2 transparent polymer membrane layers above and below the Solar Cell layer that can withstand extreme temperatures and is extremely durable. The Eva layer has the effect of bonding the tempered glass layer, Solar Cell layer, and battery panel together. At the same time, the Eva layer also helps protect the Solar Cell layer, avoiding dirt, moisture, and vibration.
  • Solar Cell layer (photovoltaic cells) : Mono and poly solar cells are both made from silicon (a common semiconductor). A photovoltaic cell consists of N-type and P-type silicon layers. In a cell, the silicon crystal is located between two conductive layers (ribbon and busbars). The Solar Cell layer has the main effect of absorbing solar radiation and converting it into electricity.
  • Battery baseplate : Made of polymer, PET, PP, PVF plastic. The panel has moisture-proof, mechanical protection and electrical insulation properties.
  • Battery frame : Usually made of aluminum so it is light and sturdy, helping to fix and protect internal components against external forces and wind loads. 
  • Junction box : This part is designed to be quite sturdy and is located at the bottom. This is where the power generated from solar panels is gathered and transferred to the outside.
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Image of installing a mono crystalline energy battery for the Dunlopillo project

Currently, there are many types of solar cells, but the most popular are batteries made from mono crystals and poly crystals .

  • Mono crystal : Works well even in low-intensity light conditions and produces more power but costs more.
  • Poly crystal : Cheap price, helps users optimize costs but operates weaker and produces less power.

You can learn more: Comparison between mono batteries and poly batteries

Inverter (inverter)

The inverter is placed between the DC and AC electrical cabinets. This is the part that works:

  • Converts DC current into AC alternating current to supply electrical equipment.
  • Monitor the peak power of solar panels.
  • Prevents DC reverse current intrusion.
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Inverter installed for Dunlopillo

Currently, there are many types of inverters commonly used on the market, some prominent types of inverters deployed by VREnergy for solar power projects:

  • Growatt inverter is one of the popular and reliable inverter brands, widely used in small and medium solar power projects.
  • SMA Inverter is a high quality inverter brand from Germany, used in large and highly stable solar power projects.
  • Huawei Inverter is an inverter brand from China, widely used in solar power projects in Asia. Huawei inverter has smart features and wifi connection, helping users easily control the solar power system.
  • Sungrow Inverter is an inverter brand from China, widely used in solar power projects in Asia and Europe. Sungrow inverter has a compact design and high stability.

These types of solar power inverters all have the feature of converting direct current (DC) from solar panels into alternating current (AC) suitable for use in homes or businesses. However, choosing the right inverter type for a solar power system needs to be based on the specific needs and technical conditions of each project.

Rack system

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Construction of solar roof rack frame

The rack system is usually made from aluminum or steel which is light in weight, highly durable, and resistant to wear and tear. This part’s main function is to connect and support solar panels and prevent external impacts on the battery array.

Other solar energy accessories and supplies

In addition to the above components, the solar power system also includes:

  • DC power cable : Connects and moves DC current from solar panels to DC electrical cabinets and inverters.
  • AC power cable : Connects and moves AC current from the inverter to electrical cabinets, meters, electrical equipment…
  • DC electrical cabinet : Transmits DC current from solar panels to the inverter.
  • AC cabinet : Transmits electricity from the inverter to electrical equipment and the national grid.
  • MC4 connector : Is an electrical connector, helping to connect solar panels
  • 2-way electric meter : Used to measure electricity 

Transporting materials to install solar power systems to the roof

Principle of solar power operation

The system operates on the principle of photoelectric effect:

  • Solar panels absorb solar radiation and convert it into DC current.
  • DC current passes through the inverter and is converted into alternating current to supply electrical equipment and storage on the national grid.

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Solar power system installation diagram

To complete the solar power system , people often install the following:

  • Solar panels are installed on racks and fixed on the roof/ground/water surface.
  • The solar panels are connected to each other via MC4 ports 
  • The battery bank is connected to the DC electrical cabinet
  • DC electrical cabinet connected to inverter
  • The inverter connects to the AC cabinet
  • AC electrical cabinets are connected in series with consuming loads, 2-way electricity meters and the national grid

Thus, the structure of a solar power system consists of many different parts. These parts are connected and closely linked together to turn solar radiation into electricity. This is a convenient artificial energy system, bringing many benefits to users.

Classification of solar power systems

To choose a solar power system that suits your needs, you need to distinguish between types of solar power systems . 3 forms of solar power include: Grid-connected solar power system, independent solar power system and combined solar power system. 

Grid-connected solar power system

Grid-connected solar power or grid-connected solar power is an electrical system that operates from a combination of solar power and national grid power. This system is divided into two types: without reserve and with reserve. 

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When the demand is greater than the amount of electricity provided by the solar power system , the system will automatically use national grid electricity. In case the production system is surplus compared to consumption demand, the excess electricity will be pushed to the national grid. EVN will buy back this electricity through the indicator recorded on the 2-way meter. 

Independent solar power system

This system is completely independent of mains power. With an independent solar power system , electricity will be produced and stored in batteries for later use. 

Combined solar power system

As a combination of two grid-connected solar power systems and independent solar power systems, this system can both produce electricity for connection to the national grid and store electricity in batteries to serve other purposes. and future needs. 

Should I install a solar power system or not?

Over the past many years, solar power has appeared all over the country, in many families and large and small projects. Let’s immediately learn the following advantages to know why solar power is chosen so much.

Benefits of solar power systems

Solar power systems bring many benefits to users, including:

  • Cost savings: Solar power systems use free solar energy to produce electricity, minimizing monthly electricity costs.
  • Environmental protection: Using a solar power system is an effective way to reduce emissions and negative impacts on the environment.
  • Be proactive about energy: Using a solar power system allows users to provide their own energy and reduce dependence on traditional electricity suppliers.
  • Policy support: Some countries have policies to encourage the installation of solar power systems with subsidies and tax incentives. For example, in Vietnam, the government has issued policies to support and encourage the installation of solar power systems such as loan support and tax reduction.

Learn more about: Top 10 banks offering low-interest loans for rooftop solar power installation in 2023

Install solar power for households

Installing a solar power system for households is an effective solution to save energy and reduce environmental pollution. Using solar panels, the system will convert sunlight into clean energy and save monthly electricity costs for the family. 

Specifically, a 10kWp solar power system will help your family generate 14,400 kWh/year , reducing electricity costs by 36,000,000 VND per year . We will exploit the value of the solar power system in 20 – 30 years . That is a significant savings, helping to improve the quality of family life. 

Install solar power for businesses

So with the scale of a business, what capacity will we need to install a solar power system?

Installing a solar power system for a business will require a capacity suitable for that business’s electricity needs. The installed capacity of solar power for businesses can depend on many factors such as the building’s roof area, the number of electrical devices used, the capacity of each device, etc.

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Usually, solar power experts will evaluate and advise customers on the installed capacity of the solar power system in accordance with the electricity needs of the business .

However, to give you an overview, the installed capacity of solar power for businesses usually ranges from a few kWp to several hundred kWp. For example, a small and medium-sized enterprise with an area of ​​about 400m2 needs to supply electricity for office operations, computers, printers, lights, etc., the installed capacity of the solar power system is usually from 3 kWp to 4 kWp . However, if the business is a manufacturing plant with a large area and high electricity demand, the installed capacity of the solar power system will be much larger, possibly up to several hundred kWp or even several MWp .

We invite you to see details of typical projects that VREnergy has implemented: Our projects

Install solar power for investment purposes to generate profit

Installing a solar power system for the purpose of investing to make a profit is one of the smart choices at the present time, when energy sources from the sun are becoming more popular and prices are also decreasing. less.

To install solar power for profitable investment purposes, VREnergy has methodically designed the process to bring the best solution for your business:

  • Research & survey the needs and terrain of project implementation: Before starting to invest, you need to evaluate the potential of the location to install the solar power system by considering the ability to receive sunlight. weather, tilt, direction of the roof or surface to be installed, etc
  • Make a detailed plan: Based on the assessed potential, you can determine the capacity of the solar power system that needs to be installed and the initial investment cost. After determining the initial investment cost, you need to calculate the profit based on the value saved from using solar energy, the selling price of electricity from the power plant, as well as the resale value. Excess electricity for power houses.
  • Carry out construction and installation projects.
  • Acceptance and review to put into operation.
  • Periodic maintenance and upkeep.

Typical projects that VREnergy has implemented: Dau Tieng 1 Lake solar power field, VSIP Nghe An, VSIP Quang Ngai, Kieng Giang Bia, Tan Phu Cuong…

If you are an investor and need to learn details about solar power investment rates , profit margin, and payback period, please contact Hotline 0923797986 immediately, VREnergy’s team of experts will send you specific solutions. and the most detailed plan!

VREnergy – Professional Solar Power System Installation Company

With much dedication to developing and building the VREnergy brand – Specializing in supplying and distributing solar power equipment and installing solar power systems nationwide. With the motto “Optimal solutions – Operation with peace of mind” and after-sales and maintenance policies on VREnergy distributed products. VREnergy is proud to bring quality solar power solutions to all customers.

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Our marks of honor when accompanying leading businesses in Vietnam in solar power deployment projects: Vietswan Manufacturing Factory (Binh Phuoc), LDC Processing (Binh Duong), Factory Zylux (Nghe An), Tan Phu Cuong (District 12, Ho Chi Minh City), Ho Dau Tieng 1 (Tay Ninh).

We are very honored to accompany and contribute to enhancing the value of your business.