How to judge the quality of bifacial solar panels?
4 min readAs the demand for renewable energy continues to increase, solar panels, as an important renewable energy device, have received widespread attention. As a new form of solar panels, bifacial solar panels have the characteristics of double-sided power generation, so they are very popular. However, in the face of many brands and models, how do consumers judge their quality? This article will introduce you in detail from the following aspects.
1. Understand the basic principles of bifacial solar panels
Before judging the quality of bifacial solar panels, you first need to understand its basic principles. Bifacial solar panels refer to panels with photosensitive materials coated on both sides, which can absorb sunlight and ground-reflected light energy at the same time. This design makes bifacial solar panels have higher photoelectric conversion efficiency than single-sided panels under the same lighting conditions. Therefore, when choosing bifacial solar panels, pay attention to the key indicator of its photoelectric conversion efficiency.
2. Observe the appearance quality
Surface flatness: The surface of a high-quality bifacial solar panel should be flat and smooth, without obvious scratches, dents, or bubbles. These defects may cause light scattering and reduce the photoelectric conversion efficiency.
Frame quality: The frame of the panel should be firm and tightly combined with the cell, without looseness. The material and process of the frame will also affect the service life and wind pressure resistance of the panel.
Junction box and connector: The junction box should have good waterproof performance, and the connector should be firm and reliable. The quality of these components is directly related to the safety performance and service life of the panel.
Identification information: Qualified bifacial solar panels should have clear information such as manufacturer, model, specification, production date, etc. This information helps consumers understand the source and performance of the product.
3. Test performance parameters
Open circuit voltage (Voc): Open circuit voltage refers to the output voltage of the panel under no load. Generally speaking, the higher the open circuit voltage, the higher the photoelectric conversion efficiency of the panel. However, it should be noted that the open circuit voltage of panels of different brands and models may be different, so when comparing, it is necessary to make judgments based on actual conditions.
Short circuit current (Isc): Short circuit current refers to the output current of the panel in the short circuit state. The larger the short circuit current, the higher the photoelectric conversion efficiency of the panel. Similarly, the short circuit current of panels of different brands and models may be different, so when comparing, it is necessary to make judgments based on actual conditions.
Maximum power point (Pmax): The maximum power point refers to the output power of the panel in the best working state. The higher the maximum power point, the higher the photoelectric conversion efficiency of the panel. When testing the maximum power point, you can use professional solar test instruments for measurement.
Temperature coefficient: The temperature coefficient refers to the change in the photoelectric conversion efficiency of the panel at different temperatures. Generally speaking, the lower the temperature coefficient, the better the performance of the panel in a high-temperature environment. When choosing a bifacial solar panel, pay attention to the parameter of its temperature coefficient.
Attenuation rate: The attenuation rate refers to the degree of decrease in the photoelectric conversion efficiency of the panel during use. Generally speaking, the lower the attenuation rate, the longer the service life of the panel. When choosing a bifacial solar panel, pay attention to the parameter of its attenuation rate.
4. Investigate the strength of the manufacturer and after-sales service
Manufacturer strength: Choosing bifacial solar panels produced by manufacturers with strong R&D strength and technical accumulation can ensure the quality and performance of the product. In addition, pay attention to the manufacturer's production scale, production equipment, and testing methods.
After-sales service: After purchasing a bifacial solar panel, you may encounter problems such as installation, commissioning, and maintenance. Therefore, when choosing a product, pay attention to whether the manufacturer's after-sales service system is perfect, including the distribution of after-sales service outlets, service response speed, warranty period, etc.
Certification and test reports are also important bases for judging the quality of bifacial solar panels. High-quality bifacial solar panels are usually certified by national or industry certification bodies, such as ISO9001 quality management system certification, CE certification, etc. In addition, the quality of bifacial solar panels can also be judged by test reports provided by third-party testing agencies. These certifications and test reports are authoritative certifications of the quality of bifacial solar panels and can provide consumers with a reliable reference.
5. Refer to user reviews and case studies
Before buying bifacial solar panels, you can check some user reviews and case studies to understand the performance of the product in actual use. This information can help you have a more comprehensive understanding of the advantages and disadvantages of the product so that you can make a more informed choice.
In short, judging the quality of bifacial solar panels requires comprehensive consideration from multiple aspects. Only by choosing high-quality products can the stability and economy of the solar power generation system be ensured. I hope this article can provide you with some useful reference suggestions.
As a bifacial solar panel factory from China, we are committed to providing high-quality and high-efficiency solar panel products. Our factory has advanced production equipment and technology, which can produce bifacial solar panels that can absorb solar energy from both the front and back at the same time to improve energy conversion efficiency. Our products not only have excellent performance, but also durability and reliability, and can operate stably in various harsh environments. We pay attention to environmental protection and adopt sustainable production methods to reduce the impact on the environment.
www.fgnexsolar.com
Wuxi Fgnex Technology Co., Ltd.
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