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There is a secondary protection grounding terminal at the bottom of the inverter, which must be grounded.
Cable grounding
3.6 Trial run
3.6.1 Inspection before trial run
green and yellow ground wire
The cross-sectional area of the yellow-green line must be the
same as that of the PE cable in the AC cable.
Secondary protection
grounding connection.
Connecting parts are not
(included in the delivery).
The grounding connection of the secondary protection grounding terminal cannot replace
that of the PE terminal in the AC cable. Ensure that both terminals are reliably grounded.
Otherwise, manufacturers and suppliers does not assume any responsibility for possible
consequences.
Since the inverter is transformerless, it is required that the positive and negative poles of
the PV arrays cannot be grounded, otherwise the inverter cannot work normally.
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