Grounding Connection - Growatt SPH3000 Installation & Operation Manual

RJ45 terminal pin assignment
PIN assignment for inverter scapable of both charging and discharging
1 DRM5
2 DRM6
3 DRM7
4 DRM8
5 RefGen
6 COM/DRM0
7 /
8 /
Method of asserting demand response modes
MODE RJ 45 socket asserted
by shorting pins
DRM0 5 6
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Chart 5.29
Requirement
Operate the disconnection device
DRM5 1 5 Do not generate power
DRM6 2 5 Do no generate at more than 50% of rated
power
DRM7 3 5 Do not generate at more than 75% of rated
power and sink reactive power if capable
DRM8 4 5 Increase power generation(subject to
constraints from other active DRMs)

5.4.9 Grounding connection

grounding
SPH must be grounded by cable, the grounding point is showed as follow, and the
minimum grounding cable wire diameter is 10.0mm2.
Chart 5.30
PV Array Grounding
Grounding conductor of PV panel brackets must be firmly connected to earth at PV
array side and inverter side and SP side. The sectional area of grounding conductor
should be equal to the sectional area of DC grounding conductor. The minimum wire
diameter is 10.0mm.
DC Grounding
Select the DC Grounding mode according to the local standard and use the PV
grounding terminal box and DC Grounding wires of the same specification.
Grounding Device
If the positive pole or the negative pole of PV array need to be grounded in the PV
system, the inverter output should be insulated by Isolation Transformer. Isolation
transformer must conform to IEC62109-1,-2 standard.
Connection as below:
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