Electrical Connection
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4. Electrical Connection
For the best results, make sure that each MPPT channel is correctly connected
with PV string. Otherwise, the inverter will activate voltage or current protection
automatically.
Please make sure below requirements are followed:
30-40kW three phase inverters have 3 MPPT channels, each channel includes
two PV string input;
50kW three phase inverters have 3 MPPT channels, channel A and B includes 2
PV string input, and channel C includes 3 PV string inputs；
60kW three phase inverters have 4 MPPT channels, each channel includes two
PV string inputs;
• The open-circuit voltage and short-circuit current of PV string should not exceed
the reasonable range of the inverters.
• The isolation resistance between PV string and ground must exceed 10 kΩ.
• The polarity of PV strings are correct.
• Use the DC plugs in the accessory.
• The lightning protector should be equipped between PV string and inverter.
• Disconnect all of the PV (DC) switch during wiring.
4.1 PV Connection
Step 1
Note:
PV cable suggestion
Cross-section
4mm²
Warning:
The fatal high voltage may on the DC side, please comply with
electric safety when connecting.
Please make sure the correct polarity of the cable connected with
inverter, otherwise inverter could be damaged.
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