www.etsolar.hk
- 9 -
modules are found to be defective.
ET Solar recommends the following maintenance items to ensure optimal
performance of the module.
6.1 Cleaning
Clean the glass surface of the module as necessary. It is recommended to
clean the glass surface with pressured running water compliance with local
drinking standards, e.g. low mineral content, near neutral PH value. The
maximum water pressure recommended is 0.7 MPa and the water jet is at least
50cm away from the glass surface. Do not use dishwasher detergent. Do not
have water staying on the glass surfaces of PV modules for a long time.
If a module power decreases abnormally, and its glass surface is found covered
by dust, please contact your module installer, retailer or ET solar immediately
for technical support.
Do not attempt to clean a module if the glass is broken.
Electrical and mechanical connections should be checked periodically by
qualified personnel to verify that they are clean, secure and undamaged.
Problems should only be investigated by qualified personnel.
Observe the maintenance instructions for all other components used in the
system.
Please refer to”cleaning manual” for specific contents.
6.2 The visual inspection of the modules
Inspect the modules visually to find if there are appearance defects, especially:
whether the module glass is broken.
If there is burning vestige on the backsheet.
Corrosion along the cells’ bus-bar. The corrosion is caused by the dampness
infiltrated into the modules when the surface encapsulation material is
damaged during the installation or transportation.
Check if any obstacles shading the PV modules
6.3 Inspection of the connector and cable
It is suggested to carry out the following preventive inspection every 6 months.
Check the encapsulation of the connector with the cable
Check the sealing gel of the junction box to ensure it is not cracked or creviced.
7
Disclaimer of liability
Because the use of this manual and the conditions or methods of installation,
operation, use and maintenance of photovoltaic products are beyond ET Solar's
control, ET Solar does not accept responsibility and expressly disclaims liability for
loss, damage, or expense arising out of or in any way connected with such
installation, operation, use or maintenance. No responsibility is assumed by ET Solar
for any infringement of patents or other rights of third parties, which may result from
7
8
8
8
