Goodwe ETC Series User Manual page 16

03 Product Introduction
Back-up mode
• The back-up mode is mainly applied to the scenario where the grid is unstable and there
is an important load. When the grid is disconnected, the inverter turns to off-grid mode to
supply power to the load; when the grid is restored, the inverter switches to on-grid mode.
• The battery stops discharging when it reaches low SOC(State of Charge) level. When the PV
system generates power, the battery will supply power to the load again after it is charged
to a certain SOC level.
• When the power generated in the PV system is sufficient:
• When the grid works properly, the power generated in the PV system will charge the
battery as priority. The excess power will then supply the household load, and still
remaining power will be fed back into the grid.
• When the grid cannot work properly, the power generated in the PV system will supply
the loads first. And the excess power will charge the batteries. The battery should supply
the househould load if the PV power is insufficient.
• When there is no power generated in the PV system:
• The grid will charge the battery and supply the load when the power grid is normal. (Do
not select this mode if the grid is not allowed to charge the battery according to the local
laws and regulations.)
• The inverter will enter off-grid mode and the battery will supply power to the load when
the grid is abnormal.
NOTICE
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User Manual V1.0-2023-05-20