ClueLuma

Annual demand-charge savings calculator

The reference approximates firm reduction as P×a; replace that approximation with actual tariff-peak evidence.

Sd=Ppeak,firm×cd,yearS_{d} = P_{\text{peak,firm}} \times c_{\text{d,year}}

Calculator

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

kW
$/(kW·yr)
$/yr

Worked example

Given

  • Ppeak,firmP_{\text{peak,firm}} = 240 kW
  • cd,yearc_{\text{d,year}} = 144 $/(kW·yr)
Sd=240×144=34,560S_{d} = 240 \times 144 = 34{,}560

Symbols and units

SymbolMeaningUnit
SdS_{d}annual demand-charge savings$/yr
Ppeak,firmP_{\text{peak,firm}}verified firm reduction at billed peakkW
cd,yearc_{\text{d,year}}annualized applicable demand charge$/(kW·yr)

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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.