ClueLuma

Annual demand-charge savings calculator

Only peak-coincident power reduction reduces the demand bill.

Sd=ΔPpeak×cd,month×12S_{d} = {\Delta P_{\text{peak}}} \times c_{\text{d,month}} \times 12

Calculator

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

kW
$/kW·month
$/yr

Worked example

Given

  • ΔPpeak{\Delta P_{\text{peak}}} = 26 kW
  • cd,monthc_{\text{d,month}} = 11 $/kW·month
Sd=26×11×12=3,432S_{d} = 26 \times 11 \times 12 = 3{,}432

Symbols and units

SymbolMeaningUnit
SdS_{d}annual demand savings$/yr
ΔPpeak{\Delta P_{\text{peak}}}reduction during billed demand intervalkW
cd,monthc_{\text{d,month}}monthly demand charge$/kW·month

Related calculators

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