Find the best compass direction and azimuth for solar panels at your location. This solar orientation calculator converts location, hemisphere, roof face, and production preference into a direction result that supports panel layout planning.
Use this page for solar orientation, solar azimuth, roof azimuth, roof direction, east-west roof comparison, and true north versus magnetic north decisions. Use the homepage solar panel angle calculator for tilt.
Calculate panel direction, true azimuth, magnetic bearing, and roof-facing guidance for your location.
The orientation result gives compass direction, true azimuth, magnetic bearing, and a practical orientation warning. The result explains whether the selected roof face is near ideal, acceptable, or worth site-specific review because local shade can override ideal azimuth.
Result cards belong directly below the calculator:
| Result | Meaning |
|---|---|
| Best compass direction | The preferred sun-facing direction for the hemisphere |
| True azimuth | Direction in degrees from true north |
| Magnetic bearing | Compass bearing after declination correction |
| Acceptable range | Direction band that remains practical for the selected goal |
| Orientation warning | Note for east, west, north, shade, or unusual roof geometry |
Azimuth turns roof direction into an installer-ready compass value.
Compass direction describes the panel-facing side in words such as south, southeast, west, or north. Direction gives users a fast interpretation before they read degree values.
For annual production, a direction close to the hemisphere’s equator-facing direction gives the cleanest starting point. East-facing panels shift production earlier in the day. West-facing panels shift production later in the day.
Solar azimuth measures horizontal direction in degrees from true north. In common convention, north is 0 degrees, east is 90 degrees, south is 180 degrees, and west is 270 degrees.
Azimuth gives installers a precise direction value. It also connects this page to PVWatts-style modeling because performance tools require array azimuth as a numeric input.
East and west orientations change production timing. East-facing panels favor morning sunlight. West-facing panels favor afternoon sunlight. A balanced annual goal usually favors the direction closest to the equator-facing side.
The tradeoff is practical. A west-facing roof can still support solar planning when roof space, shade, and household load pattern fit the design.
Solar panel orientation determines the compass-facing direction of the module surface. Orientation uses location, hemisphere, roof face, and azimuth to describe where panels face horizontally. Tilt describes vertical angle. Both values form one solar geometry pair.
This calculator answers one core question: which direction gives the panel the strongest sun-facing position for the selected site? In the Northern Hemisphere, the ideal direction normally points toward true south. In the Southern Hemisphere, the ideal direction normally points toward true north.
According to NREL PVWatts documentation, PV performance estimates use tilt and azimuth as system inputs. Azimuth gives the horizontal direction of the array, so an orientation result belongs beside the solar panel angle result.
Use this calculator in 6 steps:
The workflow separates direction from tilt. Direction tells the panel where to face. Tilt tells the panel how high to lean from horizontal.
Location identifies the site, and hemisphere changes the preferred sun-facing direction. A Northern Hemisphere roof usually favors south-facing panels because the sun tracks across the southern sky. A Southern Hemisphere roof usually favors north-facing panels because the sun tracks across the northern sky.
Latitude and longitude also support map confirmation. A ZIP code or city gives a useful starting point, while exact coordinates give a stronger roof-level result.
Roof azimuth measures the direction a roof plane faces. A roof edge drawn on a map can convert to an azimuth angle in degrees. Manual compass entry can also work when the compass is calibrated and the user understands magnetic correction.
Roof face matters because panels installed flush to a roof usually inherit that roof direction. A tilted rack can adjust panel tilt, but the roof plane still constrains practical placement.
Solar azimuth uses true north as the reference direction. Magnetic north is the direction a compass needle points. Magnetic declination is the angle difference between true north and magnetic north at a location.
Magnetic declination converts compass bearing into true azimuth. A compass reading without correction can produce a direction error, especially in regions where magnetic declination is large.
Azimuth turns roof direction into an installer-ready compass value.
Solar azimuth calculation combines location, hemisphere, roof direction, and magnetic correction into a true-north degree value. The calculator converts user-friendly direction inputs into a solar planning value that pairs with tilt and supports PV modeling.
The calculation follows 4 relationships:
Azimuth alone does not calculate total kWh. A full energy model also uses irradiance, module characteristics, system losses, temperature, shading, and inverter assumptions.
Inputs, formulas, and limits stay connected.
Tilt controls vertical angle, and azimuth controls compass direction. A panel with a strong tilt angle still underperforms its potential when the roof face points away from the strongest solar direction for that hemisphere.
Tilt and azimuth form the panel geometry pair. Tilt measures angle from horizontal. Azimuth measures direction around the horizon. A complete solar angle result includes both values because sunlight reaches the panel from a specific height and direction.
Use the Solar Panel Angle Calculator for fixed, seasonal, and monthly tilt. Use this page for direction, roof azimuth, true north, and compass interpretation.
Tilt + azimuth form the solar geometry pair.
Roof orientation constrains practical panel direction because most residential panels follow roof planes. Chimneys, dormers, trees, setbacks, vents, and neighboring structures can change the usable solar area even when the azimuth result looks strong.
Orientation limits include:
This calculator gives directional planning guidance. It does not perform a shade study, structural review, electrical design, or permit review.
Site conditions can override ideal geometry.
Use the orientation result as an installer-ready direction note. Copy true azimuth, magnetic bearing, roof face, acceptable range, and warning notes. Then compare the direction with tilt, shade, roof pitch, and available roof area.
Next actions:
According to DOE home solar planning guidance, site conditions and system characteristics affect solar planning. Orientation is one planning input, not the final system design.
Use an orientation check when roof face, shade, east-west exposure, or compass readings make the azimuth result uncertain. The check is optional and does not block the calculator result.
Choose your situation:
The orientation calculator links to supporting pages that explain direction entities without splitting synonym calculators into duplicate URLs. Use these guides when the result raises a specific orientation question.
Support pages connect to one calculator entity.
The best orientation points panels toward the strongest sun-facing direction for the hemisphere. Northern Hemisphere systems usually favor true south. Southern Hemisphere systems usually favor true north.
Solar azimuth is the horizontal compass angle measured from true north. It describes the direction a solar panel faces or the direction of the sun around the horizon.
Azimuth is the numeric version of orientation. Orientation uses direction words such as south or west. Azimuth uses degrees such as 180 or 270.
Solar planning uses true south because solar geometry references true north. Magnetic south comes from compass direction and requires magnetic declination correction.
East or west roofs can still support solar. East shifts production toward morning. West shifts production toward afternoon. Shade and roof area determine the practical result.
Tilt and azimuth matter together. Tilt sets vertical angle from horizontal. Azimuth sets compass direction. A strong solar layout uses both values.
A roof-edge mode can map roof azimuth by converting a drawn roof direction into a true-north degree value. Manual azimuth entry also works when the value is known.
Shade changes the practical best orientation because shaded roof space can produce less usable sunlight than a slightly less ideal but unshaded roof face.
The preferred direction reverses by hemisphere. Southern Hemisphere panels usually face true north because the sun path crosses the northern sky.
Yes. Orientation gives compass direction. The Solar Panel Angle Calculator gives fixed, seasonal, and monthly tilt from horizontal.
