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Federal Data Confirms Minnesota Solar Panels Don’t Work Well in Winter

Recently-released data from the U.S. Energy Information Administration (EIA) confirms what many of us already knew, that solar panels don't work well in our Minnesota winters. The data is interesting because this is the first time EIA has shown the productivity (or capacity factor) of solar panels on a monthly basis, as you can see in the graph below. While solar panels generated nearly 30 percent of their potential output in July of 2018, electricity generation from Minnesota's solar fleet dropped to 5.6 percent by December. There are multiple reasons for this. One, the days get a lot shorter in the winter...

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