pvlib.snow.fully_covered_nrel¶

pvlib.snow.fully_covered_nrel(snowfall, threshold_snowfall=1.0)[source]¶

Calculates the timesteps when the row’s slant height is fully covered by snow.

Parameters:	snowfall (Series) – Accumulated snowfall in each time period [cm] threshold_snowfall (float, default 1.0) – Hourly snowfall above which snow coverage is set to the row’s slant height. [cm/hr]
Returns:	boolean (Series) – True where the snowfall exceeds the defined threshold to fully cover the panel.

Notes

Implements the model described in [1] with minor improvements in [2].

References

[1]	Marion, B.; Schaefer, R.; Caine, H.; Sanchez, G. (2013). “Measured and modeled photovoltaic system energy losses from snow for Colorado and Wisconsin locations.” Solar Energy 97; pp.112-121.

[2]	Ryberg, D; Freeman, J. “Integration, Validation, and Application of a PV Snow Coverage Model in SAM” (2017) NREL Technical Report NREL/TP-6A20-68705