> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dalyenergy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Layouts and Tracking

> How array geometry and tracker controls influence irradiance capture

# Layouts and Tracking

Layout parameters define surface orientation and strongly affect POA irradiance.

## Supported Array Types

* `fixed`
* `tracker` (single-axis)
* `rotationalFloating`

Each array type has required fields enforced by input validation.

## Tracker Behavior

For tracker layouts, Daly computes dynamic surface angles per timestep and applies:

* Backtracking (`backTracking`) with `gcr`
* 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`, and `maxAngle` from as-built geometry.
* Pair tracker settings with matching shading assumptions.
* Validate wind-stow and diffuse-optimization assumptions against plant controls before production studies.