Tools

Battery Storage Cost Calculator

Estimate the turnkey cost of a grid-scale battery storage project from its size, duration and region. Adjust the inputs and the estimate updates live.

Project inputs

Benchmarks are for 4-hour systems; 2-hour systems use a 1.13× rate multiplier.

Estimated turnkey cost

Estimated turnkey project cost

$87,600,000

Range (−15% to +15%): $74.46M – $100.74M

Total energy

400 MWh

Effective cost

$219/kWh

Cost per kW

$876/kW

Assumptions and data source

  • Turnkey cost benchmarks are for 4-hour grid-scale systems, from the BNEF 2025 survey via Joule Post's battery storage cost analysis: US $219/kWh, Europe $177/kWh, China $73/kWh, global average $110/kWh.
  • For 2-hour systems, the $/kWh rate is multiplied by 1.13.
  • The ±15% range reflects project-specific variation (site, procurement, grid connection and local labor costs), not a statistical confidence interval.
  • This is a planning estimate, not a quote.

Data source: Joule Post's battery storage cost analysis.