The spring that everyone is looking forward to is finally reported! For photovoltaic users, the peak period of power generation is also coming. Today, the small box wants to talk with you about some common knowledge about the installation, operation and maintenance of photovoltaic systems. 1. Will the shadows of houses, leaves and even bird droppings on photovoltaic modules affect the power generation system? Answer: The blocked photovoltaic cells will be regarded as load consumption, and the energy generated by other unblocked cells will heat up at this time, and it is easy to form a hot spot effect. Thereby reducing the amount of electricity generated by the photovoltaic system, and even severely burning the photovoltaic modules. 2. Will the photovoltaic modules still work in rainy or foggy weather? Will there be insufficient power or power outage? A: The solar irradiance is low on rainy or hazy days, but the photovoltaic modules still generate electricity in low light. As long as the working state of the photovoltaic module reaches the starting condition of the inverter, the photovoltaic power generation system will work normally. When the distributed grid-connected photovoltaic system is not working, the load is automatically supplied by the power grid, and there is no problem of insufficient power and power outage. 3. Will there be insufficient power when it is cold in winter? A: The factors that directly affect power generation are the radiation intensity, the duration of sunlight and the operating temperature of the photovoltaic module. In winter, the radiation intensity will be weak and the duration of sunlight will be shortened, so the power generation will be reduced compared with summer. However, the distributed photovoltaic power generation system will be connected to the power grid. As long as the power grid has electricity, there will be no shortage of power and power outages in the household load. 4. Do I need to disconnect the photovoltaic power generation system in thunderstorm weather? Answer: Distributed photovoltaic power generation systems are equipped with lightning protection devices, so there is no need to disconnect. For safety and security, it is recommended that you can choose to open the circuit breaker switch of the combiner box, cut off the circuit connection with the photovoltaic module, to avoid the lightning protection module cannot remove the direct lightning strike and cause harm. Operation and maintenance personnel should timely detect the performance of the lightning protection module to avoid the harm caused by the failure of the lightning protection module. 5. Does the lightning protection of the home improvement system only require the component frame to be grounded for lightning protection? Answer: The frame of the DC terminal component is grounded. When the installation is high, a DC surge protector is added. In addition, the AC side also needs to be installed with an AC surge protector. 6. How to clean photovoltaic modules? Answer: Rainwater can be cleaned and no special maintenance is required. If you encounter adhering dirt, you can simply wipe it with a soft cloth and water. It is recommended to use a soft brush and clean mild water when cleaning the glass surface of the photovoltaic module. The cleaning force should be small to avoid damage to the glass surface. Components with coated glass should pay attention to avoid damage to the coating layer. 7. Will there be a risk of electric shock when wiping with water? Answer: Wiping with water is not dangerous. The photovoltaic power generation system and components are insulated and grounded. However, in order to avoid the electric shock damage to the human body and possible damage to the component when the component is wiped under high temperature and strong light, it is recommended to clean the component in the morning or late afternoon. 8. Do I need to clean up the PV module after snow? How to clean up? Answer: When heavy snow accumulates on the components after snow, manual cleaning is required. You can use soft objects to push down the snow, taking care not to scratch the glass. 9. Can I step on the components for cleaning? Answer: The module has a certain load-bearing capacity, but it cannot be stepped on and cleaned on the module. It will cause cracking damage to the module and affect the power generation and service life of the module. In general, strictly follow the user manuals of the various components of the system, and conduct regular inspections and clean maintenance of the photovoltaic system, and the power generation capacity will rise in droves!
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