17
User Manual V1.0-2022-05-10
06 Electrical Connection
6�3 Connecting the PV Input Cable
DANGER
Confirm the following information before connecting the PV string to the inverter. Otherwise, the
inverter may be damaged permanently or even cause fire and cause personal and property losses.
1. Make sure that the max short circuit current and the max input voltage per MPPT are within
the permissible range.
2. Make sure that the positive pole of the PV string connects to the PV+ of the inverter. And the
negative pole of the PV string connects to the PV- of the inverter.
3. The minimum impedance to earth of the PV module shall be greater than R. R=Max.Input
Voltage (V)/30mA, i.e. R=1100V/30mA=36.7KΩ or R=1000V/30mA=33.4KΩ).
WARNING
• Connect the DC cables using the delivered PV connectors. The manufacturer shall not be
liable for the damage if other connectors are used.
• The PV strings cannot be grounded. Ensure the minimum isolation resistance of the PV string
to the ground meets the minimum isolation resistance requirements before connecting the
PV string to the inverter.
• The DC input cable should be prepared by customers. Recommended specifications:
• Type: the outdoor photovoltaic cable that meets the maximum input voltage.
• Conductor cross-sectional area: 2.5~4mm
2
L=L1+(1~2)mm
L1
M5
1.2~2
N·m
1
2
3
