Solar Panel Angle Calculator
Find the optimal tilt angle for your solar panels by latitude with seasonal adjustments.
Free tilt tool
Solar Panel Angle Calculator
Find the optimal tilt angle for your solar panels by latitude. See seasonal adjustments and how much energy you gain versus a flat mount.
Your location
Panel setup
☀️ Seasonal tilt angles
📊 Monthly optimal tilt
🔎 How we calculated this
Optimal angles are calculated from your latitude using standard solar geometry. Actual best angle may vary by 1-3 degrees based on local climate, horizon obstructions, and atmospheric conditions. For ground-mount systems, tilt is adjustable; for rooftop, match the roof pitch as closely as practical.
Frequently Asked Questions
What is the best angle for solar panels?
The best angle for solar panels equals your latitude. At 35 degrees latitude, tilt panels to 35 degrees from horizontal. This maximizes annual energy production by facing the average sun position throughout the year. For seasonal optimization, subtract 15 degrees in summer (panels face more upward) and add 15 degrees in winter (panels face more toward the horizon).
What angle should solar panels be set at in winter?
In winter, the optimal tilt is your latitude plus 15 degrees. At 40 degrees latitude, set panels to 55 degrees in winter to face the low winter sun. This steeper angle captures significantly more energy during the shortest days of the year. If you only adjust twice a year, change to winter angle in October and back to summer angle in March (Northern Hemisphere).
Does solar panel angle really matter?
Yes, but within limits. The optimal tilt produces 15-35% more energy than a completely flat panel. However, if your tilt is within 10 degrees of optimal, you lose only 2-5% of annual production. Most residential roofs have a pitch close enough to the optimal tilt that flush mounting is perfectly adequate. The angle matters most on flat roofs, ground mounts, and at high latitudes (above 45 degrees).
Which direction should solar panels face?
In the Northern Hemisphere, panels should face due south (180 degrees azimuth). In the Southern Hemisphere, due north (0 degrees). East or west facing panels produce about 80-85% of what south-facing panels produce. If south-facing roof space is limited, splitting panels across east and west faces produces a more balanced daily output that better matches home consumption patterns.
How do I find my latitude for solar panel angle?
The easiest way: type your address into Google Maps, right-click on your location, and the latitude appears as the first number. Alternatively, search “latitude of [your city]” and Google displays it directly. Round to the nearest whole number and that is your optimal fixed tilt angle. Use the calculator above for precise monthly angles.
Is a solar tracker worth the cost?
Single-axis trackers produce 15-25% more energy than fixed-tilt systems but cost 30-50% more and add mechanical maintenance. For residential rooftop systems, trackers are not practical. For ground-mount systems on rural properties, the math can work if the land is available and the system is large enough to justify the tracker cost. Most residential and small commercial systems achieve the best ROI with a simple fixed tilt at latitude.