Estimate the grid battery system sizing using transparent inputs tailored to grid battery planning. The calculator returns a main estimate plus supporting values so you can check assumptions, compare scenarios, and identify the variables that most affect the result. Use measured project data when available; early-stage defaults are only a starting point and should be replaced before making an investment or engineering decision.
Power rating must also be at least the required load; this result sizes energy capacity.
The estimate is the nameplate energy capacity required to meet the target load and duration assumptions.
Planning estimate only. Confirm equipment limits, degradation, auxiliary consumption, site conditions, tariffs, financing, tax treatment, and safety requirements with qualified professionals.
A 50 MW load for 4 hours requires 200 MWh delivered. At 90% efficiency, 90% depth of discharge, and 15% margin, estimated nameplate capacity is 284.0 MWh.
Only losses represented by the efficiency or derating input are included. Add upstream losses to the relevant input assumption when needed.
Use annual output or operating assumptions that already reflect partial cycling and actual dispatch.
Use a current usable-capacity value for a single-year estimate, or include a degradation assumption when the calculator provides one.
No. It is a planning estimate and does not model every control limit, tariff, tax, financing, safety, or site-specific constraint.
Dispatch strategy, ambient conditions, auxiliary loads, downtime, control limits, prices, and measurement boundaries can all change actual performance.
| Variable | Unit | Meaning |
|---|---|---|
| Load | MW | Required output power |
| Duration | hours | Support period |
| Efficiency | % | Stored-to-load efficiency |
| Depth of discharge | % | Usable nameplate share |
| Margin | % | Planning contingency |