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Solar Panel Calculator
Estimate solar panels needed for your usage. Calculator configuration coming soon — this is placeholder content.
100% FreeNo sign-up required
Accurate ResultsBased on real formulas
Easy to UseGet results in seconds
Estimate solar panels needed for your usage. Calculator configuration coming soon — this is placeholder content.
How to Calculate Solar Panel Calculator
🧮 Formula
Panels Needed = ceil(Daily Usage ÷ Daily Production per Panel), where Daily Usage = Monthly Usage ÷ 30, and Daily Production per Panel = (Panel Wattage × Sun Hours) ÷ 1000
📄 Example Calculation
A home using 900 kWh/month with 5 average daily sun hours and 400W panels needs about 15 panels — a 6 kW system.
Factors That Affect the Result
✓ Local average sun hours
✓ Panel wattage and efficiency
✓ Roof orientation and shading
✓ Household energy usage
Frequently Asked Questions
Does this account for roof shading or orientation?
No — this is a rough sizing estimate based only on the numbers you enter. A professional site assessment accounts for shading, orientation and roof condition.
Where do I find my average sun hours?
Search "peak sun hours" plus your city — most regions have published average figures.