Electrical Wiring Connections; Pv Wiring Connections; Battery Wiring Connections - Goodwe ET Series User Manual

2.4 Electrical Wiring Connection
2.4.1 PV Wiring Connection
Before connecting PV panels/strings to the inverter, please make sure all requirements listed
below are followed:
• The total short-circuit current of a PV string must not exceed the inverter's max DC current. (For
models GW8KL-ET and GW10KL-ET, PV2 has 2 pairs of PV connectors which can accept 2PV
strings with a total short-circuit current of no more than 22A)
• The minimum isolation resistance to ground of the PV string must exceed 19.33kΩ in case of any
shock hazard.
• The PV string must not be connected to the earth/grounding conductor.
• Use the right PV plugs in the accessory box. (BAT plugs are similar to PV plugs. Please check
before using them.)
Note: There are MC4, QC4.10, or Amphenol plugs in the accessory box. The connection details are
shown below.
Step 1
Prepare the PV cables and PV plugs.
2.5-4mm 7mm
2
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2.5-4mm 7mm
2
Note:
1. Please use the PV plugs and connectors
from the accessory box.
2. The PV cable should be a standard
2.5–4mm .
2
Step 3
Screw the cap on and plug it into the inverter side.
Note: There will be a clicking sound if the connectors are inserted
correctly into the PV plugs.
The polarity of the PV strings must not be connected in a reverse manner. Otherwise,
the inverter could be damaged.
For the GW8KL-ET and GW10KL-ET models, use two separate PV plugs if the short-cir-
cuit current of the PV array connected to inverter's PV2 input is greater than 15A.
Step 2
Connect the PV cable to the PV connectors.
MC4 /QC4.10 Series AMPHENOL Series
Note:
1. The PV cable must be tightly crimped onto
the connectors.
2. For Amphenol connectors, the limit buckle
cannot be pressed.
3. There will be a clicking sound if the connec-
tors are inserted correctly into the PV plugs.

2.4.2 Battery Wiring Connections

Please be careful of any electric shock or chemical hazards. For batteries without a built-in DC
breaker, make sure that an external DC breaker (≥40A) connected.
Make sure the battery is under normal working condition （such as battery voltage and BMS
setting etc.） when the inverter and battery is to be used. If you need to use the hybrid inverter as
a Grid-tied inverter, please contact GoodWe after-sales.
Make sure that the battery switch is off and that the nominal battery voltage meets ET series specifications before
connecting the battery to the inverter. Make sure the inverter is totally isolated from both PV and AC power.
Please strictly follow the requirements and steps listed below. Using inappropriate wires may cause bad contacts and
high impedances, which are dangerous for the system.
Use the correct BAT plugs from the accessory box.
The maximum battery current is 25A. Please use the tin-plated cables for which the cross section
ranges from 4 to 6mm² (AWG 10). The battery cable requirements are shown in Figure 2.4.2-1.
A
B
C
Figure 2.4.2-1
Connection process for battery wiring
Step 1
Open the spring using a screwdriver.
Step 3
Insert the cable gland into the sleeve (C).
Tighten the cable gland to 2 Nm torque (D).
Use a suitable and calibrated torque
wrench, size 15. Use an open-jaw wrench,
size 16, to hold the connector in place.
D
Size 15
C
2 Nm
Grade Description Value
A Outside diameter of insulation 5.5-8.0 mm
B Conductor core section 4-6 mm
2
C Conductor core length 15 mm
Step 2
Carefully insert the stripped wire with
twisted litz wires all the way into (A). The
litz wire ends must be visible in the spring.
Close the spring. Make sure that the spring
is snapped into (B).
A
Step 4
Insert two BAT
connectors into the
inverter BAT input.
There will be a
clicking sound if the
connectors are
inserted correctly.
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