How to Connect Solar Cells?

When we produce customized solar panels according to the specific needs of customers, we usually need to cut the solar cells into small pieces, and then connect the small pieces of solar cells in series or parallel as needed to form a solar cell string. Then, different numbers of solar cell strings are connected according to the required electrical performance to form a solar panel.

According to different types of solar cells and different production processes, there are usually two ways to connect solar cells.

For traditional crystalline silicon solar cells, in mass production, the connection method is usually through an automatic string welding machine. The positive electrode of one solar cell is connected to the negative electrode of the adjacent solar cell with a soldering ribbon to form a solar cell string. Using a string welding machine can not only greatly improve production efficiency and save labor costs, but also ensure product consistency.

For back-contact solar cells, in mass production, the connection method is usually to attach the solar cells to the PCB board through an SMT machine in a designed way, and then solder the solar cells together through reflow soldering. Or use an automatic string welding machine to connect in series or parallel in the same way as traditional crystalline silicon solar cells.

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/2023/1130/how-to-connect-solar-cells.html

What kind of tests do photovoltaic solar modules face under high temperatures?

Recently, under the combined effect of the greenhouse effect and the El Niño phenomenon, extreme high temperature weather has generally occurred in various parts of the world. For photovoltaic modules exposed for a long time, high temperatures will reduce their power generation, affect the power generation efficiency of the modules, accelerate the loss of sensitive components, and reduce the insulation performance of the enameled wires of motor coils in photovoltaic modules, cables, inverters and other electrical equipment, causing a short circuit and ignition of the circuit. In severe cases, it may even cause a fire in the photovoltaic power station, endangering personal safety and property safety.

Since the design and operation cycle of photovoltaic power plants is as long as 25-30 years, they are bound to experience extreme weather many times during their long life cycle. So, what efforts have photovoltaic manufacturers made to ensure that modules operate reliably at high temperatures?

By observing the “peak power temperature coefficient” (Pmax) of the solar module, we can intuitively compare the power generation performance of photovoltaic modules from different manufacturers in high-temperature environments, and then evaluate their heat resistance. The peak power temperature coefficient is a negative number. The smaller its absolute value, the better the power generation performance of the component under high temperature conditions. Generally speaking, when the module operates at a standard operating temperature of 25°C, the module output power is 100%. After that, every time the operating temperature increases by 1°C, the module output power will decrease accordingly. For example, the peak power temperature coefficient of the mainstream PERC solar module currently on the market is -0.34%/°C. When the operating temperature of the solar module is higher than 25°C, its output power will decrease by 0.34% for every degree of increase.

In an era of frequent extreme weather, solar modules with smaller absolute peak power temperature coefficients are obviously more popular.

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/Industry_News/2023/1013/tests-solar-modules-high-temperatures.html

Amorphous Solar Panel

Amorphous solar cell can harvest energy and generate electricity from environment light like sunlight or indoor light. It has good performance during weak light condition. This kind of solar cell can be used to power low-consumption electronic devices.

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

Round Solar Panel 9V 2.7W

  • 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:
2.7W 9V Solar Panel

This 2.7W 9V round 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-C030
Solar Panel SizeD=180mm*5mm
Peak Power (Pmax)2.7W
Voltage at Pmax (Vmp)9V
Current at Pmax (Imp)0.3A
Open Circuit Voltage (Voc)10.8V
Short Circuit Current (Isc)0.33A
Solar Cell TypeMono PERC Solar Cell
Power Tolerance±5%
Encapsulation method3.2mm Tempered glass
Back sheetTPT
Product Warranty5 Years
Lead time25 Days
Storage temperature-20°C ~ 65°C
Working temperature-40°C ~ 85°C
Standard Test Conditions (STC)1000W/m2, 1.5AM, 25°C Cell temperature

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

The working principle and advantages and disadvantages of organic solar cells

Organic Solar Cell (OSC) is a solar cell made of organic materials such as dyes or conjugated polymers, which can convert sunlight into electrical energy, and has high stability and preparation flexibility.

Organic solar cells work by absorbing sunlight and photons excite and separate charges to form charge carriers. In organic solar cells, conjugated polymers are usually used as charge transport materials, in which cations or oxides with low ionization potential are used as electron acceptors, and the charge transfer between the conjugated group and the electron acceptor constitutes the charge separation, the process of transport, which is the determinant of the performance of organic solar cells.

Organic Solar Cell

Compared with traditional silicon solar cells, organic solar cells have the characteristics of low manufacturing cost, good flexibility, and adjustable color. Specifically, their main advantages are:

Low manufacturing cost: Compared with silicon solar cells, the manufacturing cost of organic solar cells is lower, and the preparation process is simple, and simple preparation methods such as printing can be used.

Good flexibility: Since organic solar cells use flexible organic substances and substrates, they have higher bendability and thinness, and can be made into various forms of flexible solar cells.

Adjustable color: organic solar cells are made of organic materials such as dyes or conjugated polymers, and the color range of solar cells can be adjusted by changing the type and ratio of materials.

Organic solar cells also have some disadvantages, mainly including:

Low Efficiency: Current organic solar cells have lower conversion efficiencies than crystalline silicon solar cells.

Poor stability: Organic substances are more easily affected by factors such as light, oxygen, and moisture. Therefore, organic solar cells have poor stability and are hardly suitable for long-term stable operation.

Short lifespan: Due to the relatively short lifespan of organic solar cell materials, the stable output of solar cells cannot be guaranteed for a long time.

At present, organic solar cell technology is still under continuous research and development, and its advantages in flexibility, low cost, and adjustable color still have great prospects and potential.

Posted by Carrie Wong | WSL Solar Co., Ltd.
WSL Solar has been a quality and professional manufacturer of customized solar panels and solar solution provider in China since 2006.
https://www.wsl-solar.com

What is a back contact solar panel？

A back contact solar panel is a type of photovoltaic solar panel that differs from conventional solar panels in the way that the photovoltaic solar cells are manufactured and arranged. In a back contact solar panel, the electrodes that collect the electrical current generated by the solar cells are located on the back of the cell, rather than on the front and sides as in a traditional solar panel. This configuration allows for a potentially higher electrical output per cell and an overall higher efficiency of the panel since there are fewer areas for energy loss or shading to occur.

Back contact solar panels are also known for their durability, as they don’t have any front-side wires that are vulnerable to breakage or corrosion. They are often used in special applications such as space satellites and outdoor equipment, where high efficiency and durability are important factors.

However, back contact solar panels may be more expensive to manufacture than traditional solar panels since they are built using more specialized manufacturing techniques.

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

What is an ETFE solar panel?

An ETFE solar panel is a type of solar panel that uses a lightweight and durable plastic called ETFE (ethylene tetrafluoroethylene) as its transparent cover material. ETFE is a fluoropolymer that is known for its toughness, high transparency, and corrosion-resistant properties. Compared to glass, which is a common material used in conventional solar panels, ETFE has a few advantages, such as being more flexible, lightweight, and able to withstand extreme temperatures and harsh weather conditions.

The use of ETFE enables the creation of flexible and thin-film solar panels that can be used in a wide range of applications, such as electric vehicles, portable chargers, and IoT applications etc. ETFE solar panels are also considered to be more aesthetically pleasing than traditional solar panels due to their translucency, which allows them to blend in more naturally with the surroundings.

Overall, ETFE solar panels are a promising technology that could open up new possibilities for solar power generation and integration in various industries.

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

Mono Solar Panel vs Poly Solar Panel

Which is better, polycrystalline silicon solar panels or monocrystalline silicon solar panels?

Both polycrystalline and monocrystalline silicon solar panels have their advantages and disadvantages depending on the specific application. Here are a few differences:

1.    Efficiency: Monocrystalline solar panels generally have a higher efficiency, as the manufacturing process produces more pure silicon that has a uniform look and consistent performance. Polycrystalline solar panels, on the other hand, use silicon fragments and have a lower efficiency.

2.    Space: Monocrystalline solar panels tend to have a higher power output per unit of space, making them a good option for installations with limited space. Polycrystalline solar panels require more space to generate the same amount of power, making them a good option for larger installations with ample space.

3.    Cost: Polycrystalline solar panels are generally less expensive to produce than monocrystalline solar panels, making them a more affordable option. However, as manufacturing processes improve, the difference in pricing has become less noticeable.

4.    Temperature and shading: Polycrystalline solar panels are better suited for installations with high outdoor temperatures and shading, while monocrystalline solar panels perform better under low light conditions.

Ultimately, the choice between polycrystalline and monocrystalline solar panels will depend on a variety of factors, including budget, space limitations, and performance requirements.

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/2023/0510/mono-solar-panel-vs-poly-solar-panel.html