5.4.4 Grounding
AC Grounding
The Growatt UE must be connected to the AC grounding conductor of the power
distribution grid via the ground terminal (PE).
PV Grounding
The grounding conductor in the framework of the PV array must be connected to the
PV grounding conductor and the DC grounding conductor. The cross-section of the
grounding conductor corresponds to the cross-section of the largest conductor in the
DC system.
DC Grounding Conductor
A DC grounding conductor may be required by the Authority Having Jurisdiction
(AHJ). Use the terminal block for the PV grounding conductor and DC grounding
conductor.
Ground kit
If PV modules of the PV system require POSITIVE or NEGATIVE to connect to
GROUND, the output of inverter should connect to grid with an isolating
transformer. The connection method is below:
N of transformer should not be connected to PE.
Inverter
L1
L2
L3
N
PE
25
26
5 In order to seal the inverter, all unneeded DC inputs must be closed with sealing
plugs:
Cable requirements:
Mode
Diameter(mm)
Area(mm²)
AWG
4000UE
5000UE
1.63-2.05
2.5-4
14-12
6000UE
5.5 Grid Type
5.5.1 Common grid type
Based on the local GRID standards, it may select different connection types. In the
following you will find an overview of the most common type of grid structure.
1.63-2.05
2.5-4
14-12
1.63-2.05
2.5-4
14-12
