Maintenance; Module Cleaning Guidelines - CanadianSolar CS3W-PB-AG Installation Manual

 The maximum allowable twist angle of the module is 0.5
degree.
 Please contact the tracker manufacturer and Canadian
Solar's technical support department for details in
regard to specific projects.
 Please verify the approved loads in the table with the
racking suppliers.
The maximum deflection (△L shown in the below

picture) is measured at the module corners under its
own weight with a typical tracker mounting system. The
maximum allowable
25mm.

7.0 MAINTENANCE

Do not make modifications to any component of the PV

module (diode, junction box, connectors or others).
 Regular maintenance is required to keep modules clear
of snow, bird droppings, seeds, pollen, leaves, branches,
dirt spots, and dust.
 Modules with sufficient tilt (at least 15°), generally may
not require cleaning (rain will have a self-cleaning
effect). If the module has become soiled, wash with
water and a non-abrasive cleaning implement (sponge)
during the cool part of the day. Do not scrape or rub dry
dirt away, as this may cause micro scratches.
 Snow should be removed using a soft brush.
 Periodically inspect the system to check the integrity of
all wiring and supports.
 To protect against electric shock or injury, electrical or
mechanical inspections and maintenance should be
performed by qualified personnel only.

8.0 Module Cleaning Guidelines

This manual covers the requirements for the cleaning
EN-Rev IM/GN-BM-EN/2.5C1Copyright © January, 2023. CSI Solar Co., Ltd.
deflection of the module is
procedure of Canadian Solar double glass photovoltaic
modules. The purpose of these cleaning guidelines is to
provide general information for cleaning Canadian Solar
modules. System users and professional installers should
read these guidelines carefully and strictly follow these
instructions.
Failure to follow these instructions may result in death,
injury or damage to the photovoltaic modules. Damages
induced by inappropriate cleaning procedures will void
Canadian Solar warranty.
SAFETY WARNING
 Cleaning activities create a risk of damaging the
modules and array components, as well as increasing
the potential electric shock hazard.
 Cracked or broken modules represent an electric shock
hazard due to leakage currents, and the risk of shock is
increased when modules are wet. Before cleaning,
thoroughly inspect modules for cracks, damage, and
loose connections.
 The voltage and current present in an array during
daylight hours are sufficient to cause a lethal electrical
shock.
 Ensure that the circuit is disconnected before starting
the cleaning procedure as contact with leakage of
electrically active parts can result in injury.
 Ensure that the array has been disconnected to other
active components (such as inverter or combiner boxes)
before starting with the cleaning.
 Wear suitable protection (clothes, insulated gloves, etc.).
Do not immerse the module, partially or totally, in

water or any other cleaning solution.
 Rear side cleaning of the modules is not required, if
cleaning the rear of a module is desired, care should be
taken to ensure there is no damage caused to the
module by simply clearing the contaminant by hand or
with a soft sponge.
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