Comparative Analysis of Conversion Efficiency of Various Solar Panels

Considering factors such as conversion efficiency of solar panels, technical level, maturity of production process, market share, etc., for large-scale grid-connected photovoltaic power plants, the types of solar panels currently commonly used can be roughly divided into crystalline silicon solar panels and amorphous silicon solar panels. Crystalline silicon solar panels are further divided into monocrystalline silicon solar panels and polycrystalline silicon solar panels. Amorphous silicon solar panels are mainly thin-film solar panels. The following is a brief analysis of the conversion efficiency of various photovoltaic solar panels:

1. Monocrystalline silicon solar panels
Monocrystalline solar panels are the most common high-efficiency solar panels on the market today. The production process and technological breakthroughs of the single crystal industry chain determine that it has a more perfect crystal lattice, can better absorb light, and has a higher conversion efficiency. For monocrystalline solar panels, the efficiency of PERC high-efficiency monocrystalline solar cells has exceeded 23%, setting a world record. The conversion efficiency of ordinary monocrystalline solar cells is also above 19%, which is the highest photoelectric conversion efficiency among all types of solar cells.
With the continuous maturity of technology, the price of monocrystalline solar panels is almost the same as that of polycrystalline. Because monocrystalline silicon is generally encapsulated with tempered glass and waterproof resin, it is durable and its service life can generally reach 20 years, and the maximum can reach 30 years.

2. Polycrystalline silicon solar panels
Compared with monocrystalline solar cells, the silicon wafer of polycrystalline solar cells is a combination of multiple tiny single crystals, with a large number of grain boundaries in the middle, including many defects. It is actually a minority carrier recombination center, thus reducing the polycrystalline silicon. At present, the conversion efficiency of polycrystalline solar cells is about 18%-20%.

3. Thin film solar panels
After several years of rapid development, the laboratory efficiency of single-junction amorphous silicon thin-film solar cells can reach about 12.7%, and the laboratory efficiency of microcrystalline silicon multi-junction solar cells can reach 13.4%. The laboratory photoelectric conversion efficiency of solar cells can reach 16%, and the average efficiency of commercial solar cells is 8%-10%. The conversion efficiency of copper indium gallium selenide can reach 14%.

However, compared with crystalline silicon solar panels, the main problem of thin-film solar panels is the low photoelectric conversion efficiency, and the area of thin-film solar panels required to convert the same amount of electric energy is huge. In addition, thin-film solar panels also have the disadvantage of poor stability, and their energy conversion efficiency changes with the prolongation of irradiation time. These shortcomings are the biggest obstacles to the wide application of thin-film solar panels.
From the analysis of the conversion efficiency of the above three types of photovoltaic solar panels, it is not difficult to see that the conversion efficiency of crystalline silicon solar panels is significantly higher and more stable than that of thin-film solar panels. Monocrystalline silicon solar panels have significantly higher conversion efficiency and are more stable than polycrystalline silicon solar panels. For the selection of photovoltaic power plant components, it should be combined with the specific conditions of the project, and the corresponding technical and economic comparison analysis should be carried out to finally determine the best solar panel selection suitable for the photovoltaic power plant.

WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006.
https://www.wsl-solar.com

3W Solar Panel | Custom Solar Panel

Key Features:
– Utilize high efficiency mono PERC solar cell, up to 22.5% efficiency
– Laminated by tempered glass, rigid, durable and long lasting
– Waterproof, scratch resistant, and UV resistant
– Customized solar panels for industrial use

Description:
5V 3W Solar Panel

This custom shaped 3w solar panel utilizes high efficiency mono PERC solar cells with efficiency up to 22.5%, to ensure its high output. It is laminated by tempered glass to protect the solar cells inside, making it rigid, durable and long lasting. This rigid solar panel is waterproof, scratch resistant, and UV resistant, specially designed for long term outdoor use in any challenging condition.

Applications:
Tempered glass solar panels are widely used in IoT applications, marine buoys, wireless sensors, traffic warning devise, GPS devices, asset tracking, electric fence chargers, outdoor lighting systems, weather monitoring systems etc.

  Solar Panel Specification

Item No.WSL-C029
Solar Panel Size155x155x4.5mm
Peak Power (Pmax)3.2W
Voltage at Pmax (Vmp)5V
Current at Pmax (Imp)640mA
Open Circuit Voltage (Voc)6V
Short Circuit Current (Isc)704mA
Solar Cell TypeMono PERC Solar Cell
Power Tolerance±5%
Encapsulation method3.2mm Tempered glass
Back sheetTPT
Product Warranty5 Years
Lead time25 Days
Storage temperature-40°C ~ 85°C
Working temperature-40°C ~ 85°C
Standard Test Conditions (STC)1000W/m2, 1.5AM, 25°C Cell temperature

Click here to watch the video of this type of custom solar panels. 

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5V Solar Panels   |  6V Solar Panels   |  9V Solar Panels

WSL Solar has been a quality and professional manufacturer of custom solar panels and solar solution provider in China since 2006. 

Source of origin: https://www.wsl-solar.com/3w-solar-panel.html

Custom Solar Panel Construction

The construction of custom solar panels varies slightly depending on the lamination method and the materials used. The following is a brief introduction to the construction of tempered glass solar panels and ETFE solar panels.

1. Solar Panel Construction of Tempered Glass Solar Panels
Tempered Glass / EVA / Solar Cell / EVA / Backsheet

2. Solar Panel Construction of ETFE Solar Panels
ETFE film / EVA / Solar Cell / PCB

Tempered glass:
The role of tempered glass is to protect the solar cells, the selected photovoltaic glass must have high light transmittance (generally more than 91%), and requires ultra-white tempering treatment. The thickness of photovoltaic glass is either 3.2mm or 2.0mm. The most commonly used is the 3.2mm thick glass.

EVA:
EVA is an important encapsulant material, which is used to bond tempered glass and solar cells. It is usually cut into a thin sheet that can be inserted at the front and rear of the solar cells. The quality of transparent EVA material directly affects the lifespan of the solar panel. Should EVA be exposed to the air, it will easily age and turn yellow, thus affecting the light transmittance of the solar panel, and power generation quality.
The thickness of EVA ranges from 3mm to 4.5mm; among them, 4mm and 4.5mm are used the most.

Solar Cell:
Solar cells convert sunlight into electricity via the photovoltaic effect. They are the core parts of solar panels. Generally speaking, the power of a solar panel is proportional to the area of the solar cell.

Backsheet
The function of the backsheet is to seal, insulate and waterproof. Therefore, the selected backsheet materials such as TPT and TPE must be resistant to aging.
The backsheet is available in white and black. The white backsheet is commonly used, but some clients choose to use the black backsheet in order to maintain the color consistency with the application product and to be aesthetically pleasing. 

ETFE Film:
ETFE film is a film used to protect solar cells inside solar panels. Its thickness is usually less than 0.2mm, making it thin and light. In addition, it has the characteristics of resistance to temperature changes, high light transmittance of up to 95%, high self-cleaning, corrosion resistance, and long service life.

IBC Solar Cell
ETFE solar panels adopt IBC solar cells (interdigitated back contact) with efficiency up to 24%, to achieve a higher power output in a limited area. Traditional solar cells achieve energy conversion by having front contacts in the cell, while IBC solar cells have the contacts on the rear side, instead of placing them in the front of the cell. This allows them to achieve higher efficiency due to reduced shading on the front of the cell, and also increases the aesthetics since no contacts are visible on the front. IBC solar cell technology also improves the temperature coefficient, which means an IBC solar panel can deliver a better performance in hot climate installations. It also has excellent performance under low light conditions.

WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006.
https://www.wsl-solar.com

Source of origin: https://www.wsl-solar.com/Product_News/2022/1212/Custom-Solar-Panel-Construction.html

High Quality Custom Solar Panel Manufacturer – WSL Solar

Quality is of paramount importance to us. To deliver outstanding quality solar panels while meeting highly customized demands for solar applications is the most import thing to us. From the selection of raw materials, through the process of manufacturing, to packaging and transportation; quality control is strictly implemented.

At WSL Solar facility, in-process inspection is an overall effort performed at each stage of solar panel manufacturing. We will conduct 100% visual inspection and performance tests of all custom solar panels before packaging and shipping.

https://www.wsl-solar.com

custom solar panel - WSL Solar

customized solar panel - WSL Solar

custom shape solar panel - WSL Solar

custom size solar panel - WSL Solar

WSL Solar’s Latest Product – 5W Solar Panel | IoT Solar Panel

5W Solar Panel

This 5v 5w solar panel utilizes high efficiency mono PERC solar cells with efficiency up to 22.5%, to ensure its high output. It is laminated by tempered glass to protect the solar cells inside, making it rigid, durable and long lasting. This IoT solar panel is waterproof, scratch resistant, and UV resistant, specially designed for long term outdoor use in any challenging condition.

Key Features:
 
– Utilize high efficiency mono PERC solar cell, up to 22.5% efficiency
– Laminated by tempered glass, rigid, durable and long lasting
– Waterproof, scratch resistant, and UV resistant
– Customized solar panels for industrial use

Applications:
Tempered glass solar panels are widely used in IoT applications, marine buoys, wireless sensors, traffic warning devise, GPS devices, asset tracking, electric fence chargers, outdoor lighting systems, weather monitoring systems etc.

Solar Panel Specification

Item No.WSL-C028
Solar Panel Size185x185x15mm
Peak Power (Pmax)5.5W
Voltage at Pmax (Vmp)5.5V
Current at Pmax (Imp)1A
Open Circuit Voltage (Voc)6.6V
Short Circuit Current (Isc)1.1A
Solar Cell TypeMono PERC Solar Cell
Power Tolerance±5%
Encapsulation method3.2mm Tempered glass
Back sheetTPT
Product Warranty5 Years
Lead time25 Days
Storage temperature-40°C ~ 85°C
Working temperature-40°C ~ 85°C
Standard Test Conditions (STC)1000W/m2, 1.5AM, 25°C Cell temperature

Click here to watch the video of this type of custom solar panels. 

View More Custom Solar Panels

5V Solar Panels   |  6V Solar Panels   |  9V Solar Panels

WSL Solar has been a quality and professional manufacturer of custom solar panels and solar solution provider in China since 2006. 

Wind Turbines

This summer has been very hot, with temperatures reaching 36 degrees Celsius. But when we ascended the mountain, the summit was very cool, the temperature was only 26 degrees. The wind on the top of the mountain is very strong, and there are many wind turbines installed on it. Great to see more and more clean energy.

WSL Solar has been a professional manufacturer of high quality custom solar panels and solar solution provider in China since 2006.

https://www.wsl-solar.com

IoT Solar Panels

As a professional solar panel manufacturer in China since 2006, WSL offers a wide range of custom solar panels for IoT applications.

5V Solar Panel | 4W

WSL Solar’s 4W 5V IoT solar panel is built with the latest mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for IoT applications. Solar panel size: 345x190x18mm

IoT Solar Panel, 3V 10W

3 Volt Solar Panel | 10W

WSL Solar’s 10W 3 volt solar panel is built with the latest mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for IoT applications. Solar panel size: 345x190x18mm

IoT Solar Panel, 5V 2.5W

5V Solar Panel | 2.5W

This 2.5W 5V solar panel is built with the latest mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This custom shaped solar panel is great for charging your 3.7-volt DC batteries and ideal for IoT applications. Solar panel size: 176x86x4.5mm

IoT Solar Panel, 8V 2W

2 Watt Solar Panel | 8V

WSL Solar’s 2 watt solar panel is built with high efficiency mono PERC solar cell. It is laminated by tempered glass, which is durable and robust. This black solar panel comes with a black back sheet, a matte black frame and black solar cells, providing an all-black aesthetic. This custom solar panel is ideal for use in IoT applications. Solar panel size: 124x124x18mm

IoT Solar Panel, 6V 3W

6 Volt Solar Panel | 3W

WSL Solar’s 6 Volt solar panel 3W is built with the latest mono PERC mono solar cell. It is laminated by tempered glass, which is durable and robust. This custom solar panel is ideal for use in IoT applications. Solar panel size: 120x160x4.5mm

IoT Solar Panel, 9V 2W

9V Solar Panel | 2W

WSL Solar’s 2W 9V solar panel is built with the latest mono PERC mono solar cell. It is laminated by tempered glass, which is durable and robust. This 2 watt solar panel is ideal for use in IoT applications. Solar panel size: 130x140x17mm

IoT Solar Panel, 5V 0.6W

5V Solar Panel, 0.6W | ETFE Solar Panel

This 0.6W 5V solar panel is built with the super high efficiency IBC solar cell (23.5% efficiency). It is laminated by ETFE film, which is light weight and thin. This ETFE solar panel is great for charging your 3.2-volt DC batteries and ideal for use in IoT applications. Solar panel size: 65x65x2mm

IoT solar panels, IoT solar
IoT Solar Panel, 6V 1.2W

6V Solar Panel, 1.2W | IBC Solar Panel

This 6v 1.2w IBC solar panel is built with the super high efficiency IBC solar cell (23.5% efficiency). It is laminated by PET film, which is light weight and thin. This 6V solar panel is great for charging your 3.7-volt DC batteries and ideal for use in IoT applications. Solar panel size: 85x85x1.8mm

WSL Solar has been a professional manufacturer of high quality custom solar panels and solar solution provider in China since 2006. 

https://www.wsl-solar.com

IBC Solar Panel, 6V 1.2W

IBC Solar Panel

This 6v 1.2w IBC solar panel is built with the super high efficiency back contact solar cell (IBC solar cell). It is laminated by PET film, which is light weight and thin. This 6 volt solar panel is great for charging your 3.7-volt DC batteries and ideal for use in off grid applications such as IoT applications, wireless sensors etc.

Features:
– IBC solar cell with efficiencies of up to 23% guarantee high power output
– Matte finish and no busbar on panel surface
– PET laminated, light weight and thin
– Waterproof, scratch resistant & UV resistant
– Excellent performance under low light environments
– Custom manufacturing in various size & shapes available 

Solar Panel Specification

Item No.WSL-S001
Solar Panel Size85x85x1.8mm
Peak Power (Pmax)1.2W
Voltage at Pmax (Vmp)6V
Current at Pmax (Imp)200mA
Open Circuit Voltage (Voc)7.2V
Short Circuit Current (Isc)220mA
Solar Cell TypeHigh Efficiency IBC Solar Cell
Power Tolerance±5%
Encapsulation methodPET Film
Back SheetDouble-sided FR4 PCB
Product Warranty2 Years
Lead time20 Days
Storage temperature-20°C ~ 45°C
Working temperature-40°C ~ 65°C
Standard Test Conditions (STC)1000W/m2, 1.5AM, 25°C Cell temperature

Click here to watch the video of this type of custom solar panels. 

View More Custom Solar Panels

IoT Solar Panel | 5V Solar Panels   |  6V Solar Panels   |  9V Solar Panels 

WSL Solar has been a quality and professional manufacturer of custom solar panels and solar solution provider in China since 2006. 

https://www.wsl-solar.com

What is PET Solar Panel?

PET Solar Panel means that the top layer of encapsulated material is PET film, which is a plastic film with a light transmittance of about 85%. Its surface can look shiny without any treatment, and if it is sprayed with a layer of frosted, it will look matte and a little rough to the touch.


PET solar panels are customized products with small sizes or low power output. The product structure is PET Film + EVA + Solar Cells + EVA or not + PCB. The solar cells are cut into small pieces by a laser machine, and the voltage and the electric current can be done as per the requirements, and then the single-layer transparent PET, EVA, solar cells, EVA, PCB backplanes are sequentially placed in a solar laminator for lamination. After about 20 minutes, take it out and then stick a soft and transparent protective film on the surface of the solar panel.

                                                   PET Solar Panel

What are the advantages of PET solar panels?
1. It is suitable for the production of solar modules of various sizes and different voltages and currents to meet different application scenarios.
2. Quality standards are lower than glass laminated solar panel.
3. Short lamination time and high production efficiency.
4. Low cost.

What are the disadvantages of PET solar panels?
1. Long-term exposure to the outdoors will make the PET film hard, brittle, and discolored, reducing the light transmittance of the solar panel, and at the same time, it can’t well protect the PV cells inside to avoid oxidation and corrosion. If the surface is frosted, this layer of frosted will start to fall off and become very ugly after about 0.5 years.
2. Because the lamination time is not enough, the cross-linking degree of the entire solar panel will not meet the requirements.
3. It can’t resist the relatively large impact from the outside.

What are the applications of PET solar panels?
Used for solar lawn lights, solar wall lights, solar handicrafts, solar toys, solar radios, solar flashlights, solar mobile phone chargers, solar small water pumps, solar home/office power supplies and portable mobile power systems and other products.
It is not recommended to use PET solar panels that need to be placed outdoors for a long time and have a life expectancy of more than 2 years.

WSL Solar has been a quality and professional manufacturer of custom solar panels, solar mini panels, IoT solar panels and solar solution provider in China since 2006.

https://www.wsl-solar.com

Original source: https://www.wsl-solar.com/Product_News/2022/0411/what-is-PET-solar-panel.html