Calculators
WattBuild gives you personalized home energy advice with advanced calculators that provide information tailed to your situation.
Solar calculators
Solar roof calculator
Enter your address and see how well your roof is suited for solar power.
Rooftop 
Home 
Business 
Solar savings calculator
Find out how and when an investment in solar will pay off.
Home Business 
Zip code solar potential
Determine what kind of monthly power a typical solar array can expect in your area.
Find matching solar panels
Find solar panels to match your solar generator, inverter, or charge controller. Maximize
power for the best price per watt.
DIY 
Usage Calculators
Off-grid 
