ClueLuma

TOU shifting saving calculator

Energy-charge saving is calculated as E_shift × (r_on − r_off). Use the stated system boundary and matching input units.

S=Eshift×(ron−roff)S = E_{\text{shift}} \times \left(r_{\text{on}} - r_{\text{off}}\right)

Calculator

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

kWh
$/kWh
$/kWh
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Worked example

Given

  • EshiftE_{\text{shift}} = 20,000 kWh
  • ronr_{\text{on}} = 0.18 $/kWh
  • roffr_{\text{off}} = 0.08 $/kWh
S=20,000×(0.18−0.08)=2,000S = 20{,}000 \times \left(0.18 - 0.08\right) = 2{,}000

Symbols and units

SymbolMeaningUnit
SSenergy-charge saving$
EshiftE_{\text{shift}}shifted energykWh
ronr_{\text{on}}on-peak price$/kWh
roffr_{\text{off}}off-peak price$/kWh

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.