Photovoltaic science: photovoltaic operation and maintenance of 9 questions 9 answers

1. Will the shading of the house, leaves and even bird droppings on the photovoltaic module affect the power generation system?

The blocked photovoltaic cells will be used as a load to consume the energy generated by other unblocked cells, at this time the blocked battery will heat up, and it is easy to form a hot spot effect.Thereby reducing the power generation of the photovoltaic system, and even burning photovoltaic modules in severe cases.

2. In rainy days or haze weather, photovoltaic modules will work?Will there be power shortages or blackouts?

The solar irradiance is low on cloudy and rainy days or hazy days, but the photovoltaic module still generates electricity in low light.As long as the working state of the photovoltaic module reaches the start-up conditions 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 powered by the grid, and there is no power shortage and power failure.

3. Will there be insufficient power when it is cold in winter?

The factors that directly affect the power generation are the radiation intensity, sunshine duration and the working temperature of the photovoltaic module, and the radiation intensity will be weak in winter and the sunshine duration will be shortened, so the power generation will be reduced compared with the summer.However, the distributed photovoltaic power generation system will be connected to the grid, as long as the grid has electricity, the household load will not have insufficient power and power failure.

4. Do you need to disconnect the photovoltaic power generation system in thunderstorm weather?

Distributed photovoltaic power generation systems are equipped with lightning protection devices, so there is no need to disconnect.For safety, you are advised to disconnect the circuit breaker of the bus box to cut off the circuit connection to the photovoltaic module to prevent the lightning protection module from removing direct lightning strikes.The operation and maintenance personnel should check the performance of the surge protection module in time to avoid the damage caused by the failure of the surge protection module.

5. Home improvement system lightning protection only need component border grounding lightning protection?

The DC component frame is grounded, and the direct surge protector is added in the case of higher installation. In addition, the AC side also needs to be equipped with an AC surge protector.

6. How to clean photovoltaic modules?

Rainwater can be cleaned and does not require special maintenance. If you encounter attached dirt, you can simply wipe it with a soft cloth and water. It is recommended to clean the glass surface of the photovoltaic module with a soft brush, clean and mild water, and use a small force when cleaning to avoid damaging the glass surface, and the components with coated glass should pay attention to avoid damaging the coating layer.

7. Will there be a risk of electric shock when wiping with water?

The EL tester will not be dangerous to wipe with water, and the photovoltaic power generation system and components have insulation and grounding protection. However, in order to avoid electric shock injury and possible damage to the component when wiping the component under high temperature and strong light, it is recommended to clean the component in the morning or late afternoon.

8. Do we need to clean up the snow of photovoltaic modules after snow? How to clean it?

When heavy snow accumulates on the post-snow component, manual cleaning is required. Soft objects can be used to push the snow down, taking care not to scratch the glass.

9. Can we step on the components for cleaning?

The EL tester component has a certain load-bearing capacity, but do not step on the components to clean, which will cause hidden crack damage to the component, affecting the power generation and service life of the component.

In general, strictly follow the manual of each component of the system, and carry out regular testing and cleaning maintenance of the photovoltaic system, and the power generation will rise!

Portable EL detector plays a vital role in the detection of photovoltaic power station, through EL test, you can find the internal defects of photovoltaic power station components, for the power station owner and power station operation and maintenance units to avoid losses.