ELECTRICITY CALCULATOR
Energy-efficient window payback
Estimate simple payback for a energy-efficient window using your own project cost and annual savings.
How this calculation works
(Installed cost − upfront rebate) ÷ (annual savings − added maintenance). This simple payback excludes financing, inflation, equipment degradation and resale value.
Before you use the result
This is an illustrative estimate, not a provider quote or your actual bill. Enter your current rates and charges from your plan or latest statement. Prices, billing rules and coverage can change.
Find your provider
FESCO · Octopus Energy · Southern California Edison · Search all providers
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