ESTIMATOR

BESS Sizing Estimator

Convert your power and duration requirement into a nameplate battery capacity and C-rate.

Required Power (kW)

Up to 500,000 kW

Required Duration (hours)

Up to 24 hours

Depth of Discharge (DoD)

90%

70%100%

Round-Trip Efficiency (RTE)

90%

80%98%

Depth of Discharge and Round-Trip Efficiency vary by battery chemistry and manufacturer. LFP systems commonly run 90 to 95 percent DoD. Whole-system round-trip efficiency for lithium BESS typically runs 85 to 95 percent.

Nameplate Energy Required (MWh)

1.2

Installed battery capacity

C-Rate (C)

0.50

Based on required duration

Duration ProfileShort Duration, Peaking

Usable energy to nameplate capacity

Indicative only. Real BESS specification also depends on cycle life requirements, thermal design, chemistry, and project economics, and typically includes a 5 to 10 percent manufacturing and early-life contingency on top of nameplate sizing. This is a first-pass sizing estimate.

Need a Detailed BESS Specification?

OctaSol Energy can develop a full technical specification matched to your chemistry, cycle life, and site requirements.