Solar Panel System Size & Savings Calculator
Estimate residential and commercial solar panel installation requirements based on monthly kWh consumption or electric bill. Accounts for regional peak sun hours, panel wattage ratings, system efficiency, and 25-year cumulative utility savings.
Electricity Consumption
Generation & Long-Term Financial Impact
How to Use Solar Panel System Size & Savings Calculator
Enter Power Consumption
Provide average monthly electric usage in kWh or your monthly utility bill in dollars.
Set Sun Hours & Panel Rating
Select your climate region sun hours (3.5h to 5.5h) and panel wattage (350W-450W).
Review Sizing & ROI
View required system size (kW), total panels needed, roof space required, and 25-year savings.
Frequently Asked Questions
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