The same calculators our engineering team uses.
The same calculators we built for ourselves, opened up for anyone planning a battery project. Get to a sensible first number in a couple of minutes, before you talk to a salesperson.
What do you need to work out?
Project tools
Plan the systemPeak Shaving Calculator
Turn the gap between current and target site peak into a first-pass battery power, energy and product-fit brief.
You getΔP, usable kWh, rated kWh, C-rate + product line
Battery kWh Sizing
Work backwards from load and runtime to estimate nominal kWh, usable energy, pack quantity and layout.
You getRequired kWh, pack count + series-parallel estimate
Battery Sizing Calculator
Go beyond a kWh estimate: turn a load into pack quantity, design reserve, nominal voltage and a series-parallel layout.
You getDelivered usable kWh, installed kWh, pack quantity, S × P layout + margin
Battery C-Rate Calculator
Calculate BESS C-rate, power and runtime from kW and kWh for C&I and utility energy-storage sizing.
You getC-rate + continuous power + theoretical runtime
Battery Backup Duration
Settle the "how many hours will this last in an outage" question before you commit to a battery size.
You getHours of backup at full / partial load
Move from a quick result to better questions.
Compare the assumptions behind each estimate, then use our guides and Knowledge Base to validate the next calculation.