pvlib.tracking.calc_axis_slope

pvlib.tracking.calc_axis_slope(slope_azimuth, slope_tilt, axis_azimuth)

Calculate tracker axis tilt in the global reference frame when on a sloped plane. Axis tilt is the inclination of the tracker rotation axis with respect to horizontal, ranging from 0 degrees (horizontal axis) to 90 degrees (vertical axis).

Changed in version 0.13.1: Renamed function calc_axis_tilt to calc_axis_slope.

Parameters:

• slope_azimuth (float) – direction of normal to slope on horizontal [degrees]

• slope_tilt (float) – tilt of normal to slope relative to vertical [degrees]

• axis_azimuth (float) – direction of tracker axes on horizontal [degrees]

Returns:

axis_slope (float) – tilt of tracker [degrees]

See also

pvlib.tracking.singleaxis, pvlib.tracking.calc_cross_axis_slope

Notes

See [1] for derivation of equations.

References

[1]

Kevin Anderson and Mark Mikofski, “Slope-Aware Backtracking for Single-Axis Trackers”, Technical Report NREL/TP-5K00-76626, July 2020. https://www.nrel.gov/docs/fy20osti/76626.pdf

Examples using pvlib.tracking.calc_axis_slope

Backtracking on sloped terrain

Backtracking on sloped terrain