Note: Multiple inverters are not allowed to share a circuit breaker. Leakage current protector is not
allowed to connect between the inverter and the circuit breaker.
The integrated leakage current detection device of the inverter can detect external leakage
current in real time. When the detected leakage current exceeds the limit value, inverter will
quickly disconnect with the grid. If the leakage current protection device is installed externally, the
action current should be 300mA or higher.
4.3.4 DC Side Connection
1. Make sure the DC switch is turned off before connecting PV string to the inverter.
2. Make sure PV string polarity confirms with DC connector. Otherwise, it will cause damage to
inverter.
3. Make sure the maximum open circuit voltage (Voc) of each PV string does not exceed the
maximum input voltage of the inverter under any condition.
4. Do not connect positive or negative pole of PV string to earth (PE terminal). Otherwise, it will
permanently destroy the inverter.
5. Positive cable should be red, negative cable should be black.
6. The minimum insulation resistance to ground of the PV panels must exceed 33.3kΩ (R = 1000/30
mA), there is a risk of shock hazard if the requirement of minimum resistance is not met.
There are four types of DC connectors, DEVALAN, MC4, AMPHENDL H4 and QC4.10 series.
Inverter Model
GW4000-DT GW5000-DT GW6000-DT
GW8000-DT GW10KN-DT
GW10KL-DT GW15KN-DT
GW17K-DT
GW20K-DT GW12KLV-DT
GW25K-DT GW15KLV-DT
Recommended Circuit Breaker Specifications
16A
25A
32A
32A
40A
50A
4.3.3 AC Circuit Breaker And Residual Current Protection Device
In order to ensure that the inverter can be safe and reliable to disconnect from the power grid,
please install an independent circuit breaker to protect the inverter.
DEVALAN SERIES MC4 SERIES
AMPHENOL SERIES QC4.10 SERIES
DC Cable specification.
DC Cable should use dedicated PV cable
(Suggest using 4mm PV1-F wire).
Grade
A
B
C
Description
O.D.
Conductor Material Sectional Area
Bare Wire Length
Value
4~5mm
2.5~4mm
2
7mm around
A B
C
Installation instruction of DC connector.
Please use special tools to do crimping
MC4 & QC4.10 DEVALAN & AMPHENOL
Do not crimp wire
into the limit buckle.
Negative connector
Positive connector
Inverter side
4.4 Communication Connection
4.4.1 RS485 Communication
This function only applies to the inverter with RS485 ports.
The RS485 port of inverter is used to connect the EzLogger Pro, and the total length of connecting
cable should not exceed 1000m.
Communication lines must be separated from other power lines to prevent interference to the
communication. RS485 connection are shown as below.
Inverter
RS485
EzLogger Pro
RS485RS485
PC
Router
Internet
Inverter
Inverter
1211
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