Solar Panel Calculator
Calculate how many solar panels you need based on your electricity usage, local sun hours, and panel wattage. Estimate total system cost, federal tax credit savings, payback period, and 25-year savings.
Inputs
$
Average peak sun hours in your area
%
Results
Panels Needed
20
System Size
8.0 kW
Net Cost (after credit)
$15,400
Payback Period
8.6 years
25-Year Savings
$29,600
After system cost
Cumulative Savings Over Time
Last updated:
Frequently Asked Questions
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