Reference / Low-light threshold
Model option
No threshold
Every timestep keeps its plane irradiance, however small
Inputs used: Apply the low-light threshold, Threshold on the plane global
Method
No timestep is set to zero for low light. The plane irradiance after transposition passes to the horizon and shading steps at whatever value it has, and the loss diagram has no "Global incident below threshold" row. The threshold value on the Physics tab has no effect.
The math
where
| Symbol | Meaning | Unit |
|---|---|---|
| the global irradiance on the module plane after the threshold | W/m² | |
| the global irradiance on the module plane after transposition | W/m² |
API
options.use_glob_inc_threshold = false
Symbols follow the symbol registry.