Find the perfect angle
for your solar panels
Enter your location and get the optimal tilt and azimuth angle in seconds. Based on real weather data, not just theory.
Solar Panel Angle Calculator
Find the optimal tilt and azimuth for your solar panels. Our calculator uses real historical weather data to show you the difference between theoretical and actual energy generation.
Any Location Worldwide
Search by city, address, or zip code. Or drop a pin on the interactive map. Works for both hemispheres with smart azimuth adjustment.
Weather-Adjusted Results
Compare theoretical clear-sky generation against real weather patterns. Understand how clouds affect your optimal panel orientation.
Cloud Asymmetry Insights
Discover if morning or afternoon clouds in your area shift the optimal azimuth away from due south (or north). Data-driven, not guesswork.
Find a solar installer
You know the optimal angle. Now find someone to install it right. Browse vetted solar companies across the US.
National & Regional
20+ companies from coast to coast. Major national brands and strong local installers who know your area.
Verified & Certified
Every listing is an established business. Filter by NABCEP certification, service type, and state.
Calculator + Installer
Share your optimal angle results directly with an installer. They'll know exactly how to set up your panels.
Common questions
Quick answers about solar panel angles, our calculator, and how weather affects your setup.
How do I find the optimal angle for my solar panels?
Use our free Solar Panel Angle Calculator. Enter your location (city, address, or coordinates), select the months you want to optimize for, and the calculator will determine the best tilt and azimuth angles using real historical weather data.
Does cloud cover affect the optimal solar panel angle?
Yes. Our calculator compares clear-sky theoretical generation with weather-adjusted results. In areas with asymmetric cloud patterns (e.g., more clouds in the afternoon), the optimal azimuth may shift away from due south to capture more morning sunlight.
Is this solar panel calculator free?
Yes, Solar Insight's panel angle calculator is completely free with no signup required. It works for any location worldwide and uses real weather data to provide accurate recommendations.
What is solar panel azimuth?
Solar panel azimuth is the compass direction your panels face, measured in degrees from north (0°). In the Northern Hemisphere, panels typically face south (180°). In the Southern Hemisphere, they face north (0° or 360°). Local weather patterns may shift the optimal azimuth slightly.