Many photovoltaic companies will receive inquiries from customers. In summer, the light is so strong and the light time is so long. Why is the power generation of my photovoltaic power station not as much as in the previous months.In fact, this is normal.
It is not that the better the light, the higher the power generation of the photovoltaic power station. This is because the power output of a photovoltaic system is determined by many factors, not just light conditions.Today we will share with you some of the reasons and solutions for the low power generation of photovoltaic systems.
One of the important factors is - the component problem.
Although the service life of photovoltaic modules can reach 25-30 years, as the service life increases, the power of the modules will attenuate, which will affect the power generation.
01
Components are damaged or aged
The components are poorly welded during the welding process, there is a lack of glue in the packaging process, or due to improper operation of the components during handling and installation, or even the components are violently impacted by hail during use, resulting in internal cracks in the components, serious cell breakage, etc. Symptoms have resulted in component damage. Aging of components that occurs in long-term use can also lead to power degradation.
Solution
Ask professionals to check and replace unsuitable PV modules.
02
Dust and obstructions on the surface of photovoltaic modules
Dust accumulates on the surface of the photovoltaic panel, which reduces the light transmittance of the photovoltaic glass surface and the output performance of the photovoltaic panel. The thicker the dust concentration, the lower the light transmittance, the lower the solar radiation absorbed by the panel, and the lower its output performance.
The shadow on the module will be regarded as a load to preferentially consume the energy generated by the PV module, reducing the output power.
The shadow on the module will be regarded as a load to preferentially consume the energy generated by the PV module, reducing the output power.
Solution
It is recommended to deal with the obstructions around the photovoltaic power station in time. If it is an installation and design problem, it can be adjusted according to the site conditions, and the photovoltaic panels should be cleaned regularly with cotton items such as mops after soaking in water, and the defective photovoltaic modules should be replaced or removed in time.
03
Inconsistent selection and installation of photovoltaic modules
For the same string, if the specifications, installation angles and orientations of the modules connected in series are inconsistent, the MPPT of this circuit will run at the lowest PV string voltage, resulting in a reduction in power generation.
Solution
Try to adjust the components so that the specifications, installation angles and orientations of the components connected to the same number of input channels are consistent, and the number and specifications of components connected to different input channels in the same MPPT circuit are the same.
For more information on products for PV system, please feel free to call Slocable at 86-769-22010201. You can also email us at pv@slocable.com.cn.
