Abstract—The accurate prediction of yields from photovoltaic
systems (PV) is critical for their proper operation and
financing, and in northern latitudes the effects of snowfall on
yield can become significant. This work provides methods for
identifying snowfall effects from commonly collected
performance data, and recommends a model to allow for
prediction of these effects based solely on meteorological time
series. The model was validated with data from two large-scale
(>8MW) operational PV plants. For the low tilt angles most
affected by snowfall, this analysis was able to accurately
predict both daily and mean values of snow effects. This
methodology will enable system operators to utilize
performance data to accurately identify and predict snowfall
losses, and will assist system designers to optimize for the
effects of snowfall on new system designs.
Index Terms—PV modelling, Snowfall,
Abstract—The accurate prediction of yields from photovoltaic
systems (PV) is critical for their proper operation and
financing, and in northern latitudes the effects of snowfall on
yield can become significant. This work provides methods for
identifying snowfall effects from commonly collected
performance data, and recommends a model to allow for
prediction of these effects based solely on meteorological time
series. The model was validated with data from two large-scale
(>8MW) operational PV plants. For the low tilt angles most
affected by snowfall, this analysis was able to accurately
predict both daily and mean values of snow effects. This
methodology will enable system operators to utilize
performance data to accurately identify and predict snowfall
losses, and will assist system designers to optimize for the
effects of snowfall on new system designs.
Index Terms—PV modelling, Snowfall,
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