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• Before connecting AC, DC and communication cables, connect the ground
terminals to the protective ground point to ensure reliable grounding of
the inverter.
• Please be careful about any electric shock or chemical hazard.
• Before connecting PV Panels/Strings,please make sure requirements are
followed as below:
1. The total short-circuit of PV string must not exceed inverter's max DC
current.
2. The minimum isolation resistance to ground of the PV string must
exceed 100KΩ in case of any shock hazard.
3. PV string could not connect to earth/grounding conductor.
• Before connecting battery,please make sure battery switch is o and
battery nominal voltage meet ETC series'specication before connecting
batteryto inverter and make sure inverter is isolated form PV and AC
power.
• The polarity of PV Strings/battery or on the inverter cannot be connected
reversedly,otherwise inverter could be damaged.
• Before connecting AC cable,please make sure inverter is totally isolation
form any DC/PV or AC power.
• For battery without build-in DC breaker, make sure there is an external DC
breaker connected.
• Neutral cable shall be blue, line cable shall be black or brown (preferred)
and protective earth cable shall be yellow-green.
• For AC cables, PE cable shall be longer than N&L cables, so in case that the
AC cable slips or is taken out, the protecting earth conductor will be the
last to take the strain.
• Make sure that the battery switch is o and battery nominal voltage meets
the inverter's specication before connecting battery to inverter. Make
sure inverter is totally isolated from AC power.
• Please follow the requirements and steps below strictly. Using improper
wire may cause bad contact and high impedance, which is dangerous to
the system.
2.3.3 Electrical Wiring Connection
Opening the Wiring Chamber Door
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