Peak Shaving Savings Estimator
Monthly and annual demand-charge savings from shaving peak kW, the battery needed, and how many years that cycling lasts.
Result
Formula
Calculation logicWhat to check
- Interval meter data for the true 15-minute peak, and whether the tariff bills the monthly peak or a ratcheted maximum.
- The peak window length, including any ratchet clause that keeps an old peak on the bill for months.
- Whether the utility allows battery discharge for demand control, and any limit on how often.
- Round-trip efficiency and depth of discharge, which set the nameplate size for a given shave.
- Cycle life cost: daily demand-control cycling consumes the same warranty throughput as arbitrage.
- Interconnection and metering requirements for commercial storage.
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