How Does Solar Production Vary Over the Year?

Aka, take a ride on the Solar Coaster!  The amount of electricity generated by a solar Tracker varies greatly from month to month. Days in December (in New England) are much shorter than in June. In December, each day lasts only about 9 hours. In June, each day lasts more than 15¼ hours, 70 percent longer than December’s day length.

In addition, weather patterns change throughout the season. These are not as reliable as the length of day, but we do tend to have cloudier weather in December which exacerbates that month’s low production.

Putting those factors together, you’ll understand why the number of kWhs generated from a Tracker will be quite different at different times of year. The chart below shows the production from one of our customers’ Trackers over a two year period. A peak month’s production can be more than 4 times that of a minimal month, and seasonally summer is nearly twice as productive as winter.

Monthly solar production and net metering value from a Solaflect PV Tracker

Most solar Tracker customers build up credit with their utility during the summer and use this credit to help offset winter electric bills.

We love talking about all things related to solar, so please reach out to us or call us at (802) 649-3700 if we can answer questions and help you think about how solar can cover an ever-increasing share of your family’s power usage!