Solar Panel Calculator

Free Solar Panel Calculator — calculate and compare options instantly. No signup required.

Monthly Electric Bill

Electricity Rate

$/kWh

Peak Sun Hours/DayAverage peak sun hours in your area (3=cloudy, 8=desert)

5 hrs

System Cost per WattInstalled cost including panels, inverter, and labor

3/W

Federal Tax CreditCurrent federal solar Investment Tax Credit (ITC)

30%

System Size Needed

8.93 kW (23 panels @ 400W)

Covers 1071 kWh/month

Estimated System Cost

$26,786

Cost After Tax Credit

$18,750

Annual Savings

$1,800

25-Year Net Savings

$23,651

How to Use the Solar Panel Calculator

1. Enter your values — fill in the input fields with your numbers.
2. Adjust settings — use the sliders and selectors to customize your calculation.
3. View results instantly — calculations update in real-time as you change inputs.
4. Compare scenarios — adjust values to see how changes affect your results.
5. Share or print — copy the link, share results, or print for your records.

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