Layouts and Tracking
Layout parameters define surface orientation and strongly affect POA irradiance.Supported Array Types
fixedtracker(single-axis)rotationalFloating
Tracker Behavior
For tracker layouts, Daly computes dynamic surface angles per timestep and applies:- Backtracking (
backTracking) withgcr - Max-angle clipping (
maxAngle) - Optional irradiance optimization (
settings.irradianceOptimization) - Optional wind-stow logic (
settings.windStow)
Irradiance Optimization
When enabled, the tracker can flatten tilt under very diffuse conditions (dhi/ghi threshold behavior) to improve effective capture.
Wind Stow
When configured and active, surface tilt is forced toward stow angle during high wind-speed periods.Rotational Floating Mode
rotationalFloating uses solar azimuth with bounded rotation around a central azimuth band and applies tilt/max-angle constraints.
Practical Modeling Guidance
- Use realistic
gcr,axisTilt, andmaxAnglefrom as-built geometry. - Pair tracker settings with matching shading assumptions.
- Validate wind-stow and diffuse-optimization assumptions against plant controls before production studies.