Date: April 14, 2020 Doc No: PS-M-0871 Ver: B Page 19 of 21
Do NOT share a fuse in a Combiner Box with two or more strings in parallel connection.
8. INVERTER SELECTION AND COMPATIBILITY
When installed in systems governed by IEC regulations, Trina Solar modules normally do not
need to be electronically connected to earth and therefore can be operated together with either
galvanically isolated (with transformer) and transformerless inverters.
Choose inverters with isolation transformers in hot and wet areas (such as shores, wetlands), to
ensure proper module function under positive voltage.
9. MODULE MAINTENANCE FOR PV MODULE PV
9.1 PANEL VISUAL INSPECTION AND REPLACEMENT
The modules in a PV array should be regularly checked for damage. Factors such as glass
breakage, cable breakage, and junction box damage may lead to function and safety problems.
In the case of a damaged module, replace it with the same type of module. Refer to the
appropriate Product Installation Manual for installation and dis-assembly of module.
It is recommended to perform a preventive inspection every six months without changing the
components of the module. If electrical or mechanical appliances are used for inspection or
maintenance, they should be operated by qualified professionals to avoid any electric shock or
loss of life
Trim any vegetation which may shade the solar array, thus impacting performance.
Check that mounting hardware is properly tightened.
Check that all string fuses in each non/earthed pole are operating.
Replacement modules must be of same type. Do NOT touch live parts of cables and
connectors. Use appropriate safety equipment (insulated tools, insulating gloves, etc.) when
handling modules.
Cover the front surface of modules by an opaque material when repairing. Modules when
exposed to sunlight generate high voltage and are dangerous.
Trina Solar PV modules are equipped with bypass diodes in the junction box. This minimizes
module heating and current losses.
o Do NOT open the junction box to change the diodes even if they malfunction.
o In a system using a battery, blocking diodes are typically placed between the battery and
the PV module output to prevent battery discharge at night.
In the event that a module is damaged (broken glass or a scratch on back sheet) and needs to
be replaced
o Observe the safety precautions listed earlier in this Manual
o Wear cut resistant gloves and other personal protective equipment required for the
particular installation.
o Isolate the impacted array string to prevent current flow before attempting to remove the
module.
o Disconnect the connectors of the affected module using the related disconnect tool provided
by suppliers.
o Replace the damaged module with a new functional module of the same type.
o Check the open circuit voltage of the array string and verify that this is within 10V of the
other strings to be connected in parallel.
o Turn the breaker back on.
9.2 CONNECTOR AND CABLE INSPECTION
Inspect all cables to verify that connections are tight; the cables are protected from direct
sunlight and sited away from areas of water collection.
It is recommended to check the torque of terminal bolts and the general condition of wiring at
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