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Chapter 4
Maintenance Guidelines
Periodic inspections and maintenance can improve the performance and reliability of the solar
photovoltaic system. The following methods are recommended for inspections and
maintenance.
4.1 Cleaning Modules
It is recommended to clean the modules at least once every year. The actual cleaning
frequency is dependent on the environmental conditions of the installation site. If dust or
dirt accumulates quickly, the intervals between cleaning must be shortened.
Workers are required to wear appropriate insulated protective equipment when
cleaning.
Please make sure the dust or dirt has been fully removed from the surface of the Module
when cleaning to avoid shading the surface of the Module.
It is recommended to perform cleaning operations in the early morning, evening, or
cloudy periods to lower the risks of electric shocks or burns.
When cleaning, use soft cloths or sponges with soft cleaning agents (do not use
abrasive/corrosive or acidic/alkali cleaning agents) and water close to the temperature of
the Module (to prevent thermal shocks from damaging the Module).
If it is necessary to clean the back of the Module, use tools that do not damage the
surface on the back of the Module.
When cleaning the Module frame, do not damage the surface of the frame (the frame is
generally aluminum and the surface is a layer of corrosion-resistant anodic oxide
coating).
4.2 Module Appearance Inspection
Before cleaning modules, please conduct a visual check for damage or cracks on the exterior
of each Module. The recommended inspection items are as follows:
