Wattsonic AIO ESS | USER MANUAL
43
Inverter PV string connection
The following principles must be considered when making electrical connections to
the inverter:
1) Disconnect the AC breaker on the grid side.
2) The DC switch of the inverter must be turned to the "OFF" position.
3) The number and type of the PV panels connected in the two strings of one MPPT
must be same.
4) Make sure the maximum output voltage of each PV string does not exceed 1000V.
1) Select the appropriate photovoltaic cable:
2) Peel off the DC cable insulation sleeve for
7 mm.
3) Disassemble the connector in the
accessory bag.
4) Insert the DC cable through the DC
connector nut into the metal terminal and
press the terminal with a professional
crimping plier (pull back the cable with some
power to check if it’s tight enough).
6) Use an open-end wrench to screw the nut
to the end to ensure that the terminal is
well sealed.
5) Insert the positive and negative cables
into the corresponding positive and
negative connectors, pull back the cable to
ensure that the terminal is tightly attached
in the connector.
DC connector assembly procedures
Cable type
Conductor transverse area(mm²)
General photovoltaic cable
Scope(mm²)
Recommended value(mm²)
2.5-4.0
4.0
Wire transverse area 2.5-4mm2
7mm
+
-
Crimping Plier
Open-end Wrench
