Solar Panel ROI Calculator

This calculator projects your solar investment return by estimating annual energy production based on system size and local sun hours, then calculating savings over the typical 25-year panel lifespan.

1. 1

   Step 1

   Enter your proposed solar system size in kilowatts

2. 2

   Step 2

   Enter the total installation cost including panels and labor

3. 3

   Step 3

   Enter your current average monthly electricity bill

4. 4

   Step 4

   Enter average peak sun hours in your area

5. 5

   Step 5

   Click Calculate to see payback period and ROI

• 1

  Average payback period for solar is 6-10 years

• 2

  Solar panels maintain 80%+ efficiency after 25 years

• 3

  ROI over 25 years typically exceeds 200-400%

• 4

  Solar can increase home value by 3-4%

• 5

  Peak sun hours vary from 3-6 hours by location

• Not factoring in panel degradation of 0.5% per year

• Forgetting inverter replacement costs every 10-15 years

• Overestimating sun hours without considering local weather

• Ignoring roof orientation impact on production