How Does a Solar Tracker Perform in Snow?

As a Vermont-based company, we know snow, and snow-covered solar panels don’t do anyone any good. Solar on rooftops or on fixed panels on the ground lose up to 15% of their annual production due to snow cover.  But Trackers don’t have that problem.  Why? It’s a gravity thing.  First, the winter sun is already low in the sky so a Tracker’s solar panels are already a steep surface since they’re always pointed right at the sun, meaning the snow will naturally slide off quickly. And second, a Tracker ‘sleeps’ vertical at night, facing east waiting for the sun to rise and to begin tracking again.  So any remaining snow from a daytime snowfall slides off, and any nighttime snowfall isn’t landing on a Tracker’s solar panels.

For further proof, just look at the power production on a 4 kW Solaflect Solar Tracker during February of 2015, one of the coldest and snowiest Februaries in memory, and a month during which rooftop solar panels were covered for over 3 straight weeks.

Solar Snow Fall
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