Questions and answers on common sense of on grid solar power plants

Answer: It is not recommended to install wire protection nets. Because the addition of iron wire protection net to the photovoltaic array may cause partial shadows on the solar panels and form a hot spot effect, which will affect the power generation efficiency of the entire photovoltaic power station. In addition, since all qualified photovoltaic modules have passed the ice hockey impact test, there is no need to install protective nets under normal circumstances.

2. If there is a power outage or other failures in the power grid, can the household distributed photovoltaic grid-connected system still operate normally?
Answer: After the power grid is cut off, the household distributed photovoltaic power generation system will  be out of operation and cannot generate electricity. All of the distributed photovoltaic system have anti-islanding function.

3. Will the poor power quality of the power grid affect the photovoltaic power generation system?
Answer: Grid quality problems such as high grid voltage and abnormal frequency will cause the inverter to shut down. After the grid recovers, the system will automatically recover.

4. Is additional wiring required to install photovoltaic power generation systems on existing buildings? How do I connect to the existing electrical system in my home?
Answer: The circuit of the photovoltaic system is divided into the DC part and the AC part, and the two parts of the circuit need to be wired separately. The AC part needs to be connected to the power grid, and the grid connection point is located at the user side meter position, and finally forms a connection with the existing electrical system in the user's home.

5. Is it necessary 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 them. It is suggested that for safety and insurance, you can choose to disconnect the circuit breaker switch of the combiner box, cut off the circuit connection with the photovoltaic module, and avoid the direct lightning strike that cannot be removed by the lightning protection module. The operation and maintenance personnel should detect the performance of the lightning protection module in time to avoid the harm caused by the failure of the lightning protection module.

6. How to prevent lightning for photovoltaic power generation combined with buildings?
Answer: Lightning is mainly divided into two types of hazards: direct lightning strikes and indirect lightning strikes. Protection from direct lightning strikes: Setting up metal lightning conductors to the ground on tall buildings can release the charge of huge thunderstorm clouds. Induction lightning protection: adding lightning protection devices to the photovoltaic system, that is, adding lightning protection modules to electrical equipment such as combiner boxes and inverters to protect against indirect lightning strikes.