PORTLAND PRESS HERALD • January 3, 2025
Power generated by rooftop solar panels in Maine is small relative to other New England states but nearly doubled in the last year. Rooftop solar is known as “behind the meter” because it does not take power from the regional grid. That is why, on days when rooftop solar use is high, it creates a dip in daytime energy demand on the grid instead of the typical lunchtime spike. The trend is unlikely to affect retail electricity prices on a customer’s power bill, ISO said. But that could change if time-of-use rates become more popular.