Last revised: May 17, 2013
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Chapter
Chapter
Chapter
Chapter 5
55
5 Maintenance
Maintenance
Maintenance
Maintenance
Inspect all modules annually for safe electrical connections, sound mechanical connection,
and corrosion.
BenQ Solar PV module may use anti-reflective coating (ARC) glass to enhance power
output.
Do not to touch glass surface unless wearing clean gloves in order to prevent
fingerprints or smudges on the ARC. Fingerprints may be removed with standard glass
cleaner.
Periodically clean glass and the module surface only with a soft cloth or sponge using
mild detergent and water.
Do not use harsh cleaning materials such as scouring powder, steel wool, scrapers,
blades, or other sharp instruments to clean the glass surface of the module. Use of such
materials will void the product warranty.
5.1 Module Cleaning Guidelines
Dirt piled up on the module’s transparent surface reduces its performance and may cause the
module hot spot effect. This problem may become serious in the case of industrial waste and
bird droppings collecting on the module surface.
Thin layers of dust (normal soiling) that reduce the sun’s intensity evenly are not dangerous
and the power reduction is not as significant as other debris.
Clean the module array regularly to address reduced production due to soiling. The
frequency of cleaning depends on how quickly material accumulates. Mounting the module at
or above a 15 degree angle will help prevent dust and debris from collecting on the module.
In many cases, rainfall may reduce or remove the need to clean the modules. It is best to
clean the module during early morning, late afternoon or cloudy day. Do not clean module
during high temperature, temperature lower than zero degrees Celsius, or any time when
there is a large temperature difference between module and cleanser.
