1. Cracks of solar photovoltaic modules
Cracks are flaws caused by stress or pressure in the silicon solar cells of photovoltaic modules. These cracks are usually not visible to the naked eye, only through specific test methods.
Cracks are the main cause of failure or faults of solar photovoltaic modules (ultra-full analysis of cracks in solar crystalline silicon cell modules)
2. Hot spots of solar photovoltaic modules
The local temperature rise of the hot spot inside the PERC PV module has a devastating effect on the efficiency and degradation of the solar module, and the hot spot is unstable and may eventually lead to module damage.
3. The fire of solar photovoltaic module
An extreme potential danger in the production of photovoltaic modules, especially on residential photovoltaic roofs, photovoltaic module fires are not as common as cracks or hot spots, but more evolved from potential defects, regardless of How insignificant they seem.
4. Layering of solar photovoltaic modules
Component layering is a serious problem because it allows moisture to penetrate inside the module, which can lead to catastrophic failure, at which point the module needs to be replaced.
5. Fragmentation of solar photovoltaic modules
All PV modules must have some degree of compression resistance to prevent shattering. The solar cell quality of the material (glass selection) and the construction process can cause a big difference in the quality of the modules, and the main reasons for the breakage of solar photovoltaic modules are the environment, construction and installation methods.
6. Invasion of solar photovoltaic modules
When moisture penetrates the protective layer of a solar module and contacts within the internal circuit, it severely accelerates the degradation of the module, ultimately leading to catastrophic consequences for the module and the entire photovoltaic system. Open glue is caused by poor quality production lines and poor material quality.
7. Deformation of solar photovoltaic modules
The most severe forms of deformation are likely to be caused by a combination of the harmful effects listed in the first 6 categories, or by insufficient reinforcement within the PV modules.
However, the two main areas where solar cell deformation has a greater impact are: the area where the center of the module slopes toward the roof and the outer frame area.
8. The discoloration of solar photovoltaic modules
The backsheet sometimes turns yellow or brown, a chemical reaction between poor-quality materials and sunlight, more often found in older PV modules.
Inferior or cheap solar photovoltaic module material quality is the source of the problem, once discoloration begins, EVA will continuously change from its original state, inevitably leading to material damage.
9. How to use a multimeter to measure the wattage of solar cells?
Low-power solar panels can be measured, but high-power only with a multimeter is not enough.