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7 Maintenance
Modules need to be inspected and maintained regularly, especially during the warranty period. To ensure optimum
performance of the modules, the following maintenance measures are recommended.
Cleaning
When modules are working, there should not be environmental influence factors to cover shadows in the modules, such as
other modules, supporting rail, plants, large number of dust etc., which may directly reduce the power output and may even cause
regional hot–spot effect. Therefore clean the glass surface on a regular basis, clean modules take measures so as:
The frequency of module cleaning depends on the speed of accumulation of dirt, the rain will be carried out on the module
surface is clean under normal circumstances, but still need to use a soft sponge or cloth (either dry or touch water) clean
the module, surface rough materials shall not be used for any case clean, and acid and alkali cleaner to remove dirt is
blocked too.
Avoid local heavy weight to the module during cleaning, which will lead to module glass deformation, damage the solar
cells, lead to reduce the service life of modules.
Clear snow on modules in a timely manner to avoid damage to modules caused by long-term snow accumulation and snow
melting and freezing.
Do not pierce the back-sheet when cleaning the back of the module.
It is recommended to clean the modules in the early morning or evening when the light is not strong and the module
temperature is low, especially in areas with high temperatures.
Do not attempt to clean modules with features such as broken glass or the presence of exposed wires, which may be
subject to electrical shock.
Visual inspection
Please carefully check the modules of the existence of visual defects, focusing on the following items:
Check whether the module glass is broken.
Check if the front of the module is obstructed by obstacles or foreign objects.
Check the module negative-sheet whether there is hot, negative film raised, burn through the traces and so on.
Check whether the cell bus–bar is corroded, whether encapsulation materials of the module has delamination, bubbles, etc.
Check the tightness of the bolts and the electrical connections at the connection points between the modules and the
supporting rail.
Inspection of connector and cable
It is advisable to carry out a preventive check every 6 months and check the following:
Check Junction box adhesive for cracks or cracks.
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