Setting Capacity Limit

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Capacity limit scenarios in TOU mode:
When Capacity Limit is enabled in TOU mode, the charge/discharge duration set in the TOU window must be 24 hours. Capacity Limit is not supported in non-charge/discharge time.
Other capacity limit scenarios:
- If the capacity limit is met 24 hours a day, the ratio of the ESS/Smart PCS to the load power must be properly set to ensure that the ESS/Smart PCS have sufficient capacity to meet the capacity limit.
- When the ESS is used only for capacity limit, you can set the charge window to 24 hours by setting TOU. Do not set the discharge window and non-charge/discharge window.
- The overload capacity of transformers, power distribution switches, and lines must be greater than the sum of the maximum charge current and maximum load current of the ESSs.

Choose Settings > Battery control > Capacity Limit to set the capacity limit.

Figure 6-68 Setting Capacity Limit

Parameter	Setting Description
No control	If this parameter is set, the capacity of the grid-connection point is not limited. The inverter and PCS run according to the preset control policy.
Active capacity limit	If this parameter is set, the active power of the grid-connection point for purchasing or feeding power cannot exceed the preset capacity limit.
Apparent capacity limit	If this parameter is set, the apparent power of the grid-connection point for purchasing or feeding power cannot exceed the preset capacity limit.

Parameter	Setting Description
Maximum active capacity	Set this parameter according to the charging capacity in the demand contract of the power grid company. Once set, the active power of the grid-connection point for purchasing or feeding power cannot exceed the preset value.
PV power limit when power meter fails	Specifies the active power limit of the inverter when the feed-in meter communication is abnormal. You can manually change the active power percentage of the inverter as required.
PCS power limit when power meter fails	Specifies the active power limit of the PCS when the feed-in meter communication is abnormal. You can manually change the active power percentage of the PCS as required.

Parameter	Setting Description
Maximum apparent capacity	Set this parameter according to the charging capacity in the demand contract of the power grid company. Once set, the apparent power of the grid-connection point for purchasing or feeding power cannot exceed the preset value.
PV power limit when power meter fails	Specifies the active power limit of the inverter when the feed-in meter communication is abnormal. You can manually change the active power percentage of the inverter as required.
PCS power limit when power meter fails	Specifies the active power limit of the PCS when the feed-in meter communication is abnormal. You can manually change the active power percentage of the PCS as required.