Maine's Governor Janet Mills on April 2 signed a bill into law that restores residential net metering and resets Maine's solar policy. 

So-called gross metering for behind-the-meter, residential solar power producers has been in effect in Maine since 2016. The rule required utility customers with solar PV systems to install a second electricity meter and they were compensated less than the cost of utility grid power not only for electricity they supplied to the grid, but for that consumed on site, a news report explains.

LD 91 An Act to Eliminate Gross Metering restores residential net metering in Maine. Net metering was restored for commercial utility customers earlier this year. 

According to the new net metering rule Maine residents who own a solar PV system willreceive a one-to-one credit for the surplus electricital energy they produce.

“For too long, Maine has lagged behind other states in embracing policies that advance the future of solar power,” Governor Mills was quoted as saying. “That ends today.

"By signing into law this bill, we are restoring net metering, resetting Maine’s solar policy, and charting the course for the growth of solar power to lower electricity bills and combat climate change. There is a lot more work to be done, and I look forward to working with the Legislature to send a clear signal that Maine’s clean energy future is bright.”