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4. Maintenance and care
It is required to perform regular inspection and maintenance of the modules, especially during
the warranty period. To ensure optimum module performance, Jinko recommends the following
maintenance measures:
4.1 Visual Inspection
Inspect the modules visually to find if there are any visual defects, If there are, the following
items should be evaluated:
a) If modules are observed having slight cell color differences at different angles, this is a
normal phenomenon of modules with anti-reflection coating technology.
b) Whether the glass is broken.
c) No sharp objects are in contact with the PV module surfaces.
d) PV modules are not shaded by unwanted obstacles and; or foreign material.
e) Corrosion along the cells' bus-bar. The corrosion is caused by moisture intrusion thought
the module back sheet. Check the back sheet for damage.
f) Check whether the back sheet is burn out.
g) Check if screws and mounting brackets are tight, adjust and tighten as necessary.
4.2 Cleaning
a) A build up of dust or dirt on the module(s) front face will result in a decreased energy output.
Clean the panel(s) preferably once per annum if possible (depend on site conditions) using
a soft cloth dry or damp, as necessary. Water with high mineral content may leave deposits
on the glass surface and is not recommended.
b) Never use abrasive material under any circumstances.
c) In order to reduce the potential for electrical and thermal shock, Jinko recommends
cleaning PV modules during early morning or late afternoon hours when solar radiation is
low and the modules are cooler, especially in regions with hotter temperatures.
d) Never attempt to clean a PV module with broken glass or other signs of exposed wiring, as
this presents a shock hazard.
e) Never use chemicals when cleaning modules as this may affect the module warranty and
energy output.
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