5 Electrical Connection
User Manual
38
5.6
Grounding the Inverter
Because of the transform-less design of the inverter, DC positive pole and
DC negative pole are not permitted to be grounded. The inverter will not
function properly if otherwise.
5.6.1 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 the “PE” cable to
the installation ground.
Where there are multiple inverters in the PV power system, connect the “PE” cables
of all inverters and mounting frame of PV arrays to the same copper bus bar. In this
way, they are in equipotential connection.
Fig. 5-3
Grounding of Inverter
