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3.3 Working Mode Introduction
3.3.1 On Grid Self-Use Working Mode (Default)
The on grid self-use operating mode is recommended for when the system is
installed in an area with a stable grid. The purpose is to increase self- consumption
of clean PV energy. When Inverter is set to work in this mode:

During daytime and there is sufficient PV Power
• The PV energy is used to supply local loads as first priority and then charge the
battery, excess energy will be fed into grid*1*2.
• When battery is fully charged, PV energy is supplied to the local loads and fed
into grid*1*2.

During nighttime or there is not sufficient PV Power
• The battery is discharged to provide energy to loads. If there is not enough
power from the battery, the unmet power will be supplied by the grid.
• When the battery SOC is below the DischargeEndSOC@Grid value or the
battery is empty, the inverter will stop working and local loads will be
supplied from the grid.
• Thanks to the on-grid operation, the switch from battery power, PV power and
grid power is automatic and seamless.

When grid fails
• When grid fails, the inverter will automatically disconnect from grid and
output power to the EPS port.
• When battery is discharged to the DischargeEndSOC@EPS value, the inverter
will stop working and wait for the grid to recover or until there is sufficient
power from PV panels to charge the battery.
• If grid failure can be a common occurrence in your area, you can adjust the
DischargeEndSOC@Grid higher to ensure there is battery power available.

You can also:
• Set a schedule for the inverter to charge the battery using cheap off-peak grid
power.
• Specify the daily working periods of self-use for inverter.