7 Electrical Connection
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7.6.1 Requirement for DC input
This single-phase inverter is equipped with two MPP trackers.
Requirements for PV modules strings:
1) Same type PV modules for each string.
2) The power, voltage (startup and open-circuit voltage) and operating current of each PV strings must meet the
allowable value of the inverter.
Note: Consider temperature coefficient of the PV modules;
Check the inverter parameters in section Appendix B.
7.6.2 Wiring
Negative Coupler & Contactor Pin Positive Coupler & Contactor Pin.
FIG. 7-10 Structure Illustration of DC Connector
Procedure steps
1) Strip the insulation of cable to about 7.5mm with the wire stripper tool. Note do not damage the conductors when
do the stripping, as per FIG. 7-11.
2) Place the contact around the conductors of the stripped cable, then crimp the contact with wire crimping pliers, as
per FIG. 7-12.
Ensure the conductors completely wrapped without loosening or damage.
FIG. 7-11 Strip the Cable Insulating Layer FIG. 7-12 Crimp the Contact
3) Insert the crimped contact pin into the connector back until one click audibly. Pull lightly on the cable to ensure the
contact pins of the connectors are engaged. Pay attention to the polarities when assembling.
4) Tighten the nut with a special wrench. Torque: 2.5~2.9 N.m.
FIG. 7-13 Insert the Contact FIG. 7-14 Tighten the Cable Gland
5) Insert the assembled connectors into the bottom terminal of the inverter until one sound click audibly.
The locked DC connectors can only be disconnected with special tool.
