7 Electrical Connection
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7.7 Wiring DC Input
Note: The DC connectors are in paired (negative and positive ones). Pay attention to the
polarities when assembling.
FIG. 7-12 DC Input Connectors
7.71 Requirement for DC input
This single-phase inverter is equipped with one / two MPP trackers.
Requirements for PV modules strings:
1) Same type.
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 specification in section ANNEX B.
7.72 Wiring
There are two types of DC connectors—MC4/H4, check the connector’s type for
completeness before assembling.
Negative Coupler & Contactor Pin Positive Coupler & Contactor Pin.
FIG. 7-13 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. 7-14.
2) Place the contact around the conductors of the stripped cable, then crimp the contact
with wire crimping pliers, as per FIG. 7-15.
