estimate annual arbitrage revenue and payback of C&I storage under peak-valley tariffs。enter capacity、peak-valley spread、cycle count and unit investment suffice。free、no registration required。
per-cycle arbitrage = capacity × system efficiency × (peak price − valley price)；annual arbitrage = per cycle × daily cycle count × annual operating days；annual net revenue = annual arbitrage − annual O&M（O&M at capacity×cycles×days×unit O&M count）；payback period = total investment(capacity×unit investment) ÷ annual net revenue。excluding demand-management benefits、expansion revenue and government subsidies。
actual revenue is affected by cell degradation、maximum cycle count、affected by local peak-valley periods and tariff policy；Two charges and two discharges per day can significantly raise revenue but accelerate degradation。this tool is for engineering estimation reference，for investment decisions, defer to measured project data and contracted tariffs。