WEL/ IM/ 05/ 18.03.2016
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PV Modules shall be installed and maintained by qualified personnel, only installation/service personnel
should have access to the PV Module installation site.
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Keep children away from PV Modules.
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Prior to installation, do not store Modules outdoors or in a damp environment.
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When PV Modules are installed on roofs or any other structures above ground, appropriate safety
practices should be followed and appropriate safety equipment should be used in order to avoid
possible safety hazards. Note that the installation of PV Modules on some roof types may require the
addition of fireproofing, as required by local building/fire codes.
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Follow all safety precautions of other components used in the system.
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In order to avoid risk of injury or electrical shock, do not allow anyone (unqualified or having limited
knowledge of PV Modules) to handle damaged PV Modules. Place defective PV Modules in cartons so
that no light falls on PV cell.
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Avoid uneven shade on the PV Module surface. Shaded cells may become hot (“hot spot” phenomenon)
which may result in permanent damage to the Module.
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Never expose PV Modules to sunlight concentrated with mirrors, lenses or other means.
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The maximum open circuit voltage of an array must not be greater than the specified maximum system
voltage. Voltage is directly proportional to the number of PV Modules in series and is affected by
weather conditions.
GUIDELINES & PRECAUTIONS FOR CLEANING OF PV MODULE
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It is common for dust and dirt particles to accumulate on the surface of the Module. This can reduce the
optimal output performance of the solar Modules. Normally, the accumulated dust can be washed with
water, but in some instances some maintenance is recommended to clean the surface of the glass with
water and a soft cloth or sponge to remove layer of dirt. A mild non-abrasive detergent may be applied
to remove persistent dirt.
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PV Module Cleaning should be done only by properly trained personnel who understand the risks of
applying water to electrical components.
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It is advisable to perform periodic inspection of the Modules for damage to glass, backsheet, frame,
junction box or external electrical / loose connections and corrosion by the authorized professional.
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No aggressive and abrasive cleansers or chemicals should ever be used on the coated front glass. No
alkali-based chemicals should be used, including ammonia based solutions.
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Always wear rubber gloves for electrical insulation while maintaining, washing or cleaning
Modules. Appropriate electrically insulating Personal Protective Equipment (PPE) must be worn during
any cleaning or inspection operations.
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Acceptable Module cleaning methods are to spray the Modules with low-pressure water closely
matched in temperature to the Module or to use a dry brushing technique. Do not apply water that is
more than 20°C warmer or colder than Module surface temperature as during the generation time the
temperature of Module is higher and washing may cause thermal stress in Module.
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Always make sure that Cleaning should not be done during Generation time, the recommended time to
clean Modules is from dusk to dawn when production is not affected and risk of electrical shock hazard
is minimized.