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Installation Manual for DualSun PV Modules
6.2
Cables and connecting lines
In module design, adopt enclosed connecting boxes with the protective level of IP67 for on-site
connection to provide environmental influence protection for wires and connections and contacting
protection for non-insulating electric parts. The connecting box has well connected cables and
connectors with the protective level of IP67. These designs facilitate parallel connection of modules.
Each module has two independent wires connecting the connecting box, one is negative pole and
the other is positive pole. Two modules can be in parallel connection by inserting the positive pole
at one end of wire of one module into the negative pole of the adjoining module.
Cables connecting modules shall satisfy the module maximum short circuit current. Adopt the
special PV system sunlight resistant cables.
The minimum standards of cables connecting modules are:
The minimum and maximum outer diameters of the cable are 5 to 7mm2.
Each module has two standards 90°C sunlight resistant output cables each terminated with plug &
play connectors. The wire type and gauge of the output cables are 1000V/1500V DC rated PV Wire
cable and are 4mm
²
in size. This cable is suitable for applications where wiring is exposed to the direct
sunlight. We require that all wiring and electrical connections comply with the appropriate National
Electrical Code.
When cables are fixed on the bracket, avoid mechanical damage to cables or modules. Do not
press cables by force. Adopt special designed light resistant wires and clamps to fix cables on the
bracket. Though cables are light resistant and water proof, it is still necessary to prevent cables from
direct sun radiation and water immersion.
The minimum bending radius cables should be 43mm.
6.3
Connector
Please keep connectors clean and dry. Make sure connector nuts are fastened before
connection. Do not connect connectors that are damp or dirty or under other status. Protect
connectors from direct sun radiation and water immersion or fall onto ground or roof.
Wrong connection may lead to electric arc and electric shock. Please make sure that all
electric connection is reliable. Make sure all connectors with lock are fully locked.
The connector type are ZH202
（
for SUNTER
）
and PV-LR4(for Lerri), which only mated with
the same connector type;
6.4
Bypass diode
DualSun module connecting box contains bypass diode which is in parallel connection with the
cell strands. If heat spot occurs locally with the module, the diode will come into operation to stop
the main current from flowing through the heat spot cells with the view to restrain module heating
