Solar ROI Calculator
Estimate payback period and lifetime savings using NREL PVWatts solar simulation and live EIA electricity prices.
Backed by EIA data~2 min
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Your Inputs
Select a state to see local price + emissions context. Data
If $/W is set, it overrides total cost.
Enter a valid state, usage, and system cost.
Save scenario
Saved locally (demo). Shows in your account if logged in.
Results
Enter your state, usage, and system size to estimate ROI.
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