Find out how many solar panels your home needs
Accurate calculation based on your address, roof orientation, and solar activity. Try it for free.
Great for your awesome project
Our solar panel calculator helps you quickly estimate your home's solar potential. Get accurate estimates for panel placement, energy production, and cost savings with just a few clicks.
Annual Savings
See how much you can save on electricity bills in the first year.
Solar Potential
We use NASA/Google data to estimate solar radiation in your region.
Number of Panels
We automatically calculate how many panels fit on your roof.
Payback Period
See how many years it will take for your investment to pay off.
Try it now
Find your home and see the calculation
- 1
Choose address
Or place a point on the map
- 2
Data analysis
We calculate solar activity and roof area
- 3
Ready calculation
See payback and required equipment
More with PRO access
- Advanced settings: angle, panel type
- PDF report and export
- Configuration comparison
- Export for installers
The calculator helped me realize the installation will pay off in just 5 years.
Petr, Krakow
The calculator helped me realize the installation will pay off in just 5 years.
Petr, Krakow
The calculator helped me realize the installation will pay off in just 5 years.
Petr, Krakow
Frequently Asked Questions
How much does the calculation cost?
The basic calculation is completely free. PRO access with detailed analysis costs $10
What data do I need for the calculation?
Just provide your home address. We determine the rest automatically using satellite images.
How accurate are the calculations?
The margin of error is less than 10%. We use up-to-date solar activity data from NASA and precise satellite maps.