We had solar panels installed one year ago. Now we are trying to analyze their performance relative to the estimate we had before installation. Where can I find how much sun was available in the past 12 months compared to the historical average?
You can contact the MN State Climnatology Office and ask Pete Boulay for the solar radiation data from the St Paul Climate Observatory. 651-296-4214 pboulay@umn.edu
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pboulay@umn.edu