Goodwe ETC Series User Manual page 36

06 Electrical Connection
Safety Precautions - PV Input Cable
Only for hybrid inverters.
• Do not connect one PV string to more than one inverter at the same time. Otherwise, it may
cause damage to the inverter.
• Confirm the following information before connecting the PV string to the inverter. Otherwise,
the inverter may be damaged permanently or even cause fire and cause personal and
property losses.
1. Make sure that the max short circuit current and the max input voltage per MPPT are
within the permissible range.
2. Make sure that the positive pole of the PV string connects to MPPT+ of the inverter. And
the negative pole of the PV string connects to MPPT- of the inverter.
• The PV strings cannot be grounded. Ensure the minimum insulation resistance of the
PV string to the ground meets the minimum insulation resistance requirements before
connecting the PV string to the inverter (R=maximum input voltage/ 30mA).
• Ensure the DC cables are connected tightly and securely.
• Measure the DC cables using a multimeter to avoid reverse polarity connection. Also, the
voltage should be under the permissible range.
Safety Precautions - Battery Cable
• The battery used with the inverter shall be approved by the inverter manufacturer. The
approved battery list can be obtained through the official website.
• A short circuit in the battery may cause personal injury. The instantaneous high current
caused by a short circuit can release a large amount of energy and may cause a fire.
• Before connecting the battery cable, ensure the inverter and the battery, and
downstream&upstream switches, are all disconnected.
• It is forbidden to connect and disconnect the battery cables when the inverter is running.
Otherwise it may cause electric shock.
• Do not connect one battery pack to more than one inverter at the same time. Otherwise, it
may cause damage to the inverter.
• It is forbidden to connect loads between the inverter and batteries.
• When connecting battery cables, use insulated tools to prevent accidental electric shock or
short circuit to the batteries.
• Ensure that the open circuit voltage of the battery is within the permissible range of the
inverter.
• Install a DC breaker between the inverter and the battery.
NOTICE
DANGER
WARNING
DANGER
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User Manual V1.0-2023-04-30