FREE SOLAR TOOLS
Free solar calculators
Working out if a roof is right for solar starts with two numbers: which way it faces (the azimuth) and how steep it is (the tilt). These free calculators give you both in under a minute, straight from your browser. No signup, no app, and nothing gets uploaded.
Roof Azimuth Calculator
Type your address, draw a line on a satellite photo of your roof and get its exact azimuth from true north. Works for any address in Australia.
Roof Tilt Calculator
Take a photo of your roof, line up two guides and get the tilt angle in degrees plus the pitch ratio. Your photo never leaves your phone.
Solar Panel Angle Calculator
Enter your roof's direction, tilt and postcode and see how much of the ideal solar yield it captures. Australian locations only.
Roof Area & Panel Calculator
Draw your roof on the satellite map and get the usable area, how many panels fit and the system size in kW.
Why are these calculators free?
Solar Buddy is a solar monitoring service. We watch solar systems all day and alert owners when a panel or inverter develops a fault. The better you understand your roof, the better your solar decisions, whether you're comparing quotes or trying to work out why your system underperforms. So we built the tools we wished existed and made them free.
If you already have solar, the direction and angle of your roof were locked in the day the house was built. What isn't locked in is whether every panel is still working. That's the part we help with. Here's how Solar Buddy works.
Own solar already?
Orientation sets the ceiling on what your system can produce. Faults decide whether it gets there. Solar Buddy connects to your inverter, learns how your system should perform and alerts you within 2 hours when something goes wrong.