Fig 5.22
3 Check the assembled DC connectors for correct polarity and connect them to the
inverter.
4 The maximum string currents are varying from different inverter types.
Type
Description
7000-10000UE
15A
12000UE
17A
18000UE
23A
20000UE
26A
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
7000UE
2.05
3.332
12
8000UE
2.05
3.332
12
9000UE
2.05
3.332
12
10000UE
2.05
3.332
12
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.
12000UE
2.05
3.332
12
18000UE
2.05
3.332
12
20000UE
2.05
3.332
12
Inverter
L1
L2
L3
N
PE
27
28
