User Manual 6 Electrical Connection
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Step 10 Connect other PV strings following the above-mentioned procedures.
Step 11 Seal the unused DC terminals with the waterproof plugs.
6.4 Grounding the Inverter
Because of the transformer-less design of the inverter, neither the DC
positive pole nor the DC negative pole of the PV string is permitted to be
grounded.
6.4.1 Grounding System Overview
All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power system should be grounded (e.g., PV arrays frame and
inverter enclosure).
Where there is only one inverter in the PV power system, connect “PE” cable to the
ground.
When there are multiple inverters in the PV system, they can be multi-point
grounded. Connect PE cables of all inverters and the mounting metal frames of PV
array to the equipotential cable (according to the on-site situation) to realize
equipotential connection.
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