Sungrow SG3.0RT - Electrical Connection Overview

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5.3 Electrical Connection Overview
The electrical connection should be realized as follows:
(A) PV string (B) Inverter (C) Grid
(D) External device (E) AC circuit breaker (F) Smart energy meter
table 5-3 Cable Requirements
No. Cable
Type
Cable Diameter
Wire Conductor
Cross-section
1 DC cable
Outdoor multi-core
copper wire cable
complying with
1100 V and 30 A
standard
6 mm–9 mm 4 mm
2
–6 mm
2
2 Ethernet
cable
CAT 5E outdoor
shielded network
cable
5.3 mm–7 mm 8 * 0.2 mm
2
3 Meter
RS485 cable
(1)
Shielded twisted
pair
5.3 mm–7 mm
2 * (0.5–1.0) mm
2
4
AC cable
(2)
Outdoor 5-core
copper wire cable
SG3.0RT to
SG12RT: 10 mm–
21 mm
SG3.0RT to SG12RT:
4 mm
2
–6 mm
2
SG15RT to
SG20RT: 14 mm–
25 mm
SG15RT to SG20RT:
6 mm
2
–10 mm
2
5
Additional
Grounding
cable
Outdoor single-core
copper wire cable
The same as that of the PE wire in the AC
cable
(1) The cable requirements for COM2 terminal connection are the same.
5 Electrical Connection User Manual