Avoided electricity cost calculator

Price reduced energy and actual reduced billed demand at their marginal rates; do not assume fixed charges disappear.

\text{Savings} = \Delta \mathrm{kWh} \times r_{\text{energy}} + {\Delta D_{\text{bill}}} \times r_{\text{demand}}

Calculator

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

Given

\text{Savings} = 8500 \times 0.085 + 32 \times 14 \approx 1{,}171

Symbol	Meaning	Unit
$\text{Savings}$	avoided variable bill amount	$
$\Delta \mathrm{kWh}$	energy reduction	kWh
$r_{\text{energy}}$	avoided marginal energy price	$/kWh
${\Delta D_{\text{bill}}}$	actual billed demand reduction	kW
$r_{\text{demand}}$	applicable demand rate	$/kW

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