Connect with us

Hi, what are you looking for?

Data source: U.S. Energy Information Administration, Hourly Electric Grid Monitor

Clean Power

Small-Scale Solar is Changing Hourly Utility Electricity Demand in New England

An increase in electricity generation from small-scale, customer-sited photovoltaic (PV) solar in New England is changing the hourly pattern of metered electricity demand during the spring (March–May), which you can see in our Hourly Electric Grid Monitor. Small-scale solar PV are systems with less than 1 megawatt (MW) of generating capacity and are typically not metered by a utility (referred to as behind the meter). As a result of the increase in this type of solar generating capacity in New England, electricity demand on utilities was rapidly decreasing during the morning and rapidly increasing during the evening through the spring.

Despite New England’s less favorable solar resources, solar capacity in New England has increased by 3.8 gigawatts (GW) since 2016. Small-scale solar generation rapidly increases in the morning, resulting in falling electricity demand, and rapidly decreases in the evening, resulting in rising electricity demand. Because utility grid operators generally dispatch solar generators first, they must power up (ramp up) or down other generation types to meet and balance electricity demand.

More than half of New England’s 3.8 GW of PV capacity additions since 2016, or 2.3 GW, have been small-scale solar. Because generation from small-scale solar is not metered by utilities, it is not distinguishable as a source of electricity generation on our Hourly Electric Grid Monitor; however, it is assumed to contribute to reduced electricity demand. The solar generation series in our Hourly Electric Grid Monitor tracks almost all utility-scale systems of at least 1 MW of capacity.

Data source: U.S. Energy Information Administration, Electric Power Monthly

The addition of small-scale solar has altered the average hourly rate of change in electricity demand in New England. From March through May of 2016, hourly electricity demand in New England typically increased by 500 MW during the three-hour period between 8:00 a.m. and 11:00 a.m. By 2022, electricity demand during that period usually decreased by 800 MW.

Similarly, in spring 2016, evening electricity demand typically increased by 800 MW between 4:00 p.m. and 7:00 p.m. By 2022, electricity demand increased by 1,900 MW during those three hours.

Data source: U.S. Energy Information Administration, Hourly Electric Grid Monitor

Principal contributors: Nina Vincent, Ed Thomas

Featured graph data source: U.S. Energy Information Administration, Hourly Electric Grid Monitor, Today in Energy

Appreciate CleanTechnica’s originality and cleantech news coverage? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.

Don't want to miss a cleantech story? Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News!

Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.

-- the EIA collects, analyzes, and disseminates independent and impartial energy information to promote sound policymaking, efficient markets, and public understanding of energy and its interaction with the economy and the environment.


You May Also Like


The Gulf of Maine is warming faster than 96% of the world’s oceans — increasing at a rate of 0.09 degrees Fahrenheit per year....

Clean Power

There is a threat to clean energy that’s proliferating around the United States. In articles like this one, we’ve covered the story of several...

Clean Power

Solar power + electric cars = the perfect combination!


With the completion of the Formula Sun Grand Prix, which also serves as the qualifier for the American Solar Challenge, teams have had a...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.