Here are the results of our June kWh analysis for the past five years from a representative sample of our customers in western MA.  Note the trend in electricity production versus rainfall amounts. As expected, the two are directly related. With this past June being  the 4th wettest on record  according to the Albany NY weather station, PV generation was slightly reduced. Modules are kept cleaner on arrays which is a good thing ; we’d prefer all rainfall occurred at night.

This chart was produced by Ryan Puckett, our summer intern from MCLA.