Setting EMS Control Parameters

No control

The SmartLogger directly delivers the external scheduling power limit. No other power scheduling control is performed. The power is automatically controlled by the device.

Maximum self-consumption

• This mode applies to areas where the electricity price is high, or areas where the FIT subsidy is low or unavailable.
• PV energy is preferentially supplied to loads, and the surplus energy is used to charge the batteries. If the batteries are fully charged or are being charged at full power, the surplus energy is fed to the grid. When PV energy is insufficient or no PV energy can be generated at night, the batteries discharge energy to loads. This improves the self-consumption rate and energy self-sufficiency rate, and reduces electricity costs. The grid cannot charge the batteries.
• The SmartLogger performs battery scheduling based on the external scheduling power limit and the preceding policies.

Fully fed to grid

• This parameter applies only to distributed scenarios.
• This mode maximizes the PV energy fed to the grid. When the generated PV energy in the daytime is greater than the maximum output capability of the inverter, the surplus energy is used to charge batteries. When the generated PV energy is less than the maximum output capability of the inverter, the batteries discharge energy to the inverter to maximize the energy fed from the inverter to the grid. The grid cannot charge the batteries.
• The SmartLogger directly delivers the external scheduling power limit.

TOU

• It is applicable to the PV+ESS system and ESS-only system where peak to valley electricity prices are different and power meters are available.
• You can manually set the charge and discharge time segments. For example, if you set the low electricity price period at night as the charge time, the system charges the batteries at the maximum power during the charge time. If you set the high electricity price period as the discharge time, batteries can discharge only during the discharge time based on the actual load power, reducing electricity costs.
• Click Add to set the charge and discharge time segments. A maximum of 14 time segments can be set. During the charge time, the grid can charge the batteries. During the discharge time, the batteries can supply power to the loads. In other time segments, the batteries do not discharge. The PV system and grid supply power to loads, and the PV system can charge the batteries. (In grid-tied/off-grid mode, if the grid fails, the batteries can discharge power at any time.)
• In some countries, the grid is not allowed to charge batteries. In such case, this mode cannot be used.
• The SmartLogger performs battery scheduling based on the external scheduling power limit and the preceding policies.

Maximum self-consumption

Tracking load

• Enable: The device output changes with the load so that the output is approximately equal to the load.
• Disabled: The device outputs power as much as possible. However, the output power is still affected by parameters such as external scheduling.

Battery reverse current protection

• Enable: If the battery feeds power to the grid while discharging, the system sends a standby command to the battery to eliminate the reverse power. When the battery needs to discharge power, the system sends a running command to the battery.
• Disabled: If reverse battery power is detected at the grid-connection point, the reverse power is eliminated by reducing the battery output power. The battery standby command is not delivered.

Active power threshold of grid during battery discharge

Set the maximum target grid power when the grid-connection point has zero power.

Adjustment deadband

Set the allowed fluctuation of the target grid power for the grid-connection point.

TOU

Tracking load

• Enable: The device output changes with the load so that the output is approximately equal to the load.
• Disabled: The device outputs power as much as possible. However, the output power is still affected by parameters such as external scheduling.

Battery reverse current protection

• Enable: If the battery feeds power to the grid while discharging, the system sends a standby command to the battery to eliminate the reverse power. When the battery needs to discharge power, the system sends a running command to the battery.
• Disabled: If reverse battery power is detected at the grid-connection point, the reverse power is eliminated by reducing the battery output power. The battery standby command is not delivered.

Preferred use of surplus PV power

• Charge: When the PV power is greater than the load power, the surplus PV energy is used to charge the batteries. After the maximum charge power is reached or the batteries are fully charged, the surplus PV energy is fed to the grid.
• Fed to grid: When the PV power is greater than the load power, the surplus PV energy is preferentially fed to the grid. When the maximum output power of the device is reached, the surplus energy is used to charge the batteries. This setting is applicable to the scenario where the FIT is higher than the electricity price. The grid cannot charge the batteries.

Maximum power for charging batteries from grid

Set the maximum power at which the grid charges the batteries.

Active power threshold of grid during battery discharge

Set the maximum target grid power when the grid-connection point has zero power.

Adjustment deadband

Set the allowed fluctuation of the target grid power for the grid-connection point.

Start time

Set the start time and end time of charge and discharge. A maximum of 14 time segments can be set. You can set a cycle by week by clicking the buttons corresponding to Mon. through Sun. in the Repeat box. The buttons are blue by default, indicating being selected. After you click it, the button turns gray.

End time

Charge/Discharge

Repeat