On-Grid&Back-Up Connection - Goodwe ET Series User Manual

Installation Instructions
2.4.4 On-Grid&Back-up Connection
An external AC breaker is needed for on-grid connection to isolate the inverter from the utility
grid when necessary.
Note: Backup function is optional for the German market, even though the hardware connector is always
there. Backup function is standard in all other markets.
The requirements for the on-grid AC breaker are shown below.
Inverter Model
GW5K/GW5KL-ET
GW6.5K/GW6KL-ET
GW8K/GW8KL-ET
GW10K/GW10KL-ET
Note: The absence of AC breaker will lead to inverter damage if an electrical short circuit happens on
grid side.
1. Use separate AC breakers for individual
inverters.
AC breaker
AC breaker
Requirement of AC cable connected to On-Grid and Back-Up side.
Make sure the inverter is totally isolated from any DC or AC power before connecting the
AC cable.
Note:
1. The neutral cable shall be blue, the line cable shall be black or brown (preferred), and the protective
earth cable shall be yellow-green.
2. For AC cables, the PE cable shall be longer than the N&L cables. This provides protection in case the
AC cable slips or is removed, the ensuring that the earth conductor will be the last cable to take the
strain.
1
Prepare the terminals and AC cables according to the correct table.
AC Breaker Specification
Conductor Core Section(Recommended)
25A/400V (e.g. DZ47-60 C25)
25A/400V (e.g. DZ47-60 C25)
32A/400V (e.g. DZ47-60 C32)
32A/400V (e.g. DZ47-60 C32)
AC breaker
Grid
A
C
B
User Manual V1.2-2022-03-30
2. On the AC side, an individual breaker
should be connected between the inverter
and grid but before any loads.
AC breaker
Grade
A Outside diameter
D
B Separated wire length
C Conductor wire length
D Conductor core section
12
Grid
Load
Description Value
13-18 mm
20-25 mm
7-9 mm
4-6 mm 2