Battery discharge planning

Solar Battery Discharge Schedule Planner — Match Storage to Demand

Determine how much stored energy can be delivered during an evening or backup window while protecting a minimum state-of-charge reserve.

Discharge planning inputs

%
%
kWh
kWh during discharge window
kW
%
hours
The planner models a simplified constant-power discharge. Real batteries may have SOC-dependent limits, inverter limits, reserve controls and temperature effects.
Enter starting SOC, reserve and later demand.

How battery discharge is planned

The battery can only discharge down to the chosen reserve SOC. The available stored energy is therefore the SOC difference multiplied by usable battery capacity. Discharge efficiency then determines how much reaches the load.

Available battery energy = capacity × (starting SOC − reserve SOC)
Load-deliverable energy = available battery energy × discharge efficiency

Why the reserve is important

A battery used for resilience may need to keep a substantial state-of-charge reserve even when grid-connected self-consumption would otherwise favor deeper discharge.

Demand matching

The calculator also checks whether the deliverable battery energy and discharge power are sufficient for the complete demand window. If not, the result shows the remaining demand that must come from the grid or another source.

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