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Since the PV array's output current varies with the type, connection method, or sunlight angle, its minimum wire
size can be calculated by the short circuit current(ISC). Please refer to the ISC value in the PV module's
specifications. When the PV modules are connected in series, the total ISC equals any PV module's ISC. When the
PV modules are connected in parallel, the total ISC equals all PV modules' ISC. Please refer to the table below:
Model
PV wire size
Circuit breaker
IC-24/3000/100/80
6mm
2
/9AWG
2P—40A
IC-48/5000/80/60
6mm
2
/9AWG
2P—40A
Making the connection wire of the PV module:
Step1:
Each MC4 male terminal and female terminal 1pcs(included accessories)
Step2:
PV module positive and negative connection wires 2 pcs(red +, black -). The wire length is determined
according to the customer's actual requirement.
Step3:
Strip one end of the PV module positive wire for about 5mm, and press the exposed wire to the inner core
of the MC4 male terminal, as shown below:
Step4:
Tight press the copper wire and the MC4 male terminal's inner core with a plier and ensure the connection
is secure.
Step5:
Unscrew the nut of the MC4 male terminal, insert the inner core into the MC4 terminal, and screw the nut.
Step6:
Strip one end of the PV module negative wire for about 5mm, and press the exposed wire to the inner core
of the MC4 female head, as shown below:
Step7:
Tight press the copper wire and the MC4 female head's inner core with a plier and ensure the connection
is secure.
Step8:
Unscrew the nut of the MC4 female terminal, insert the inner core into the MC4 terminal, and screw the
nut.
4) Utility input
Recommended wire size of the utility input and the circuit breaker is as below.
Model
Utility wire size
Circuit breaker
Torque
