Q&A for PV system operation and maintenance

The hot season is coming, some is worrying about electricity bills, some is caring about PV system working condition... So, today I am gonna share some common sense about PV s.

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Q1: Will the shadows of houses, leaves and even bird droppings on photovoltaic modules affect the power system?

A1: The covered photovoltaic cells will be used as a load consumption, the energy produced by other uncovered cells, then the covered cells will heat up, easy to form a hot spot effect. Thus reduce the photovoltaic system power generation, or even burn down the photovoltaic components.

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Q2: Will the modules work on rainy or foggy days? Will there be a power shortage or a power outage?

A2: The solar irradiance is lower on rainy or hazy days, but the PV module still generates electricity under weak light. As long as the photovoltaic module's working state reaches the start-up condition of the inverter, the photovoltaic power generation system will work normally. When the distributed grid-connected PV system is not working, the load is automatically supplied by the power grid.

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Q3: Is it necessary to disconnect photovoltaic system in thunderstorm?

A3: Photovoltaic power generation systems are equipped with lightning protection, it’s not. In order to ensure safety, it is suggested to disconnect the circuit breaker switch of the bus box and cut off the circuit connection with the PV module, so as to avoid the harm caused by direct lightning from the Lightning Protection Module.

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Q4: How to clean PV modules?

A4: Rainwater can be cleaned without special maintenance. If you encounter adhesive dirt, you can use a soft cloth plus water for a simple wipe. When cleaning the force to be used to avoid damage to the surface of glass, glass-coated components to pay attention to avoid damage to the coating.

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Q5: Is there any danger of electric shock when swabbed with water?

A5: No.PV systems and components are insulated and grounded. However, in order to avoid the electric shock damage and possible damage caused by cleaning the components in high temperature and strong light, it is recommended to clean the components in the early morning or late afternoon.

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Q6: Can I step on the PV module for cleaning

A6: Not suggested. It will cause module crack damage, affect the power generation and service life.

In general, strictly follow the manual of the components of the system, and conduct regular inspection and clean maintenance of the PV system.

(Clean by self is only for flat roof / ground. not sloping roof)

What else do you know? Lets study~