Estimate the best solar panel angle, tilt angle, seasonal solar tilt, roof pitch angle, azimuth direction, and estimated production impact. Use this calculator for rooftop solar panels, ground mounts, RV solar, cabin solar, off-grid solar, and seasonal solar panel adjustment planning.
Annual mode:
The calculator uses latitude as a simple year-round solar panel tilt estimate.
Seasonal mode:
The calculator estimates summer, winter, spring, and fall tilt angles from latitude-based rules of thumb.
Roof pitch mode:
The calculator converts roof rise and run into a roof pitch angle in degrees.
Production mode:
The calculator estimates annual production and applies simple tilt, azimuth, efficiency, and shading adjustments.
A solar panel angle calculator helps estimate a practical solar tilt before installing panels, comparing roof slopes, designing a ground mount, or adjusting seasonal panels.
It can help compare annual tilt, seasonal tilt, roof pitch, azimuth direction, estimated kWh production, tilt losses, and the value of improved solar alignment.
Your result shows the recommended annual solar panel tilt, summer tilt, winter tilt, spring/fall tilt, roof pitch angle, azimuth difference, estimated production factor, annual kWh estimate, and estimated energy value.
A common rule of thumb is to set the panel tilt close to your latitude for balanced year-round solar production.
For summer production, panels are often tilted flatter than latitude, commonly around latitude minus 10 to 15 degrees.
For winter production, panels are often tilted steeper than latitude, commonly around latitude plus 10 to 15 degrees.
In the Northern Hemisphere, solar panels usually face south. In the Southern Hemisphere, they usually face north.
No. This is an estimate. Actual solar output can vary based on location, roof direction, shading, weather, panel type, mounting design, seasonal sun path, and local installation conditions.