Zero Export

The zero export strategy prevents the PV-ESS system from feeding power into the grid. If the discharging power of the PV-ESS system exceeds the load power, the system will automatically reduce the PV output, lower the discharging power, or charge the batteries to prevent power back-feeding.

  1. Choose Power control > Zero export.
  2. Click to set Function enable/disable.
    • Enable: Enable the zero export function. Configure the following parameters:

      Parameter

      Description

      Target power at grid connection point (kW)

      The default value is 0.0. It is recommended to set this value to -1% to -2% of the rated active power of the ESS.

      When the actual power at the grid connection point > the set target value, the system will automatically reduce the ESS discharge or PV output.

      Allow ESS charging during reverse power flow
      • Enable: If the ESS discharging power is reduced to zero and power back-feeding persists, the ESS switches to charging mode to absorb PV output.
      • Disable (default): If the ESS discharging power is reduced to zero and power back-feeding persists, the ESS maintains zero power output.
      Allow PV power feed-in during reverse power flow
      • Enable (default): When power back-feeding occurs, PV power feed-in is allowed.
      • Disable: When power back-feeding occurs, PV output power is reduced to prevent power feed-in.
        Note: This feature is available on EMS300CP-SV100.001.00.P027 or later.
      Feed-in control mode
      • Total active power control: Default option. The system determines whether to trigger the control strategy based on the total active power value.
      • Per-phase active power control: The system determines whether to trigger the control strategy based on the active power value of each phase.
        Note: A three-phase four-wire meter is required to measure the A/B/C phase power.
      Note: This feature is available on EMS300CP-SV100.001.00.P024 or later.
    • Disable: Disable the zero export function.
  3. Click Apply settings. In the pop-up window, enter the Task name, then click Confirm.