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Capacity after degradation calculator

Capacity degradation reduces the initial stored-energy rating by the stated lost fraction; use the remaining capacity for end-of-life duty checks.

Eend=Einitial×(1−f100)E_{\text{end}} = E_{\text{initial}} \times \left(1 - \frac{f}{100}\right)

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

kWh
%
kWh

Worked example

Given

  • EinitialE_{\text{initial}} = 800 kWh
  • ff = 18 %
Eend=800×(1−18100)=656E_{\text{end}} = 800 \times \left(1 - \frac{18}{100}\right) = 656

Symbols and units

SymbolMeaningUnit
EendE_{\text{end}}capacity after stated fadekWh
EinitialE_{\text{initial}}initial reference capacitykWh
ffcumulative capacity fade%

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.