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Electrical Connection
Table 7-2 Description of terminals
Item Description
A DC switch
B
PV connection terminal
(PV1 and PV2 terminals for 15 kW, 19.9 kW and 20 kW inverter; PV1, PV2
and PV3 terminals for 25 and 30 kW inverter)
C
COM 1 communication terminal
(including Parallel-1, Parallel-2, BMS-1, BMS-2, RS485, DRM)
D
COM 2 communication terminal
(including Ripple control, DIO,
Meter/CT)
E Dongle terminal
F Grid connection terminal
G Fans
H Ground connection point
I Battery connection terminal
J EPS connection terminal
7.2 PE Connection
All non-current carrying metal parts of the equipment and other enclosures in the PV
system must be grounded reliably. The PE point at the AC output terminal is used only as a
PE equipotential point, not a substitute for the PE point on the enclosure. The connection
point has been labeled with the following label:
We recommend that the inverter is
earthed to a nearby ground point.
CAUTION!
• In compliance with IEC62109-2, the X3-ULTRA series inverter has the grounding
detection function which is used to check whether the inverter is properly grounded
before it starts. If the the inverter is not connected with earth, the inverter will turn on
a red light and report Earth Fault.
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