Peak Shaving Calculator

Size battery storage to reduce peak demand charges for commercial facilities.

Current Peak Demand (kW) Monthly 15-min peak

Target Peak Reduction (%)

Demand Charge ($/kW) Monthly per kW charge

Peak Duration (hours) Typical peak period

Peak Occurrence Pattern

Solar System Size (kW) 0 for battery-only analysis

Solar Peak Coincidence (%) % solar available at peak

Battery Cost ($/kWh)

Power Cost ($/kW) Battery power capacity cost


                        Battery kW = Peak kW - Target Peak - Solar

                        Battery kWh = Battery kW x Peak Duration x 1.2

Peak shaving is most effective when demand charges make up a significant portion of your electricity bill.

Charge Rate	ROI Potential
< $10/kW	Low - Consider other uses
$10-20/kW	Moderate - Evaluate carefully
$20-30/kW	Good - Typically profitable
> $30/kW	Excellent - Strong ROI

Results