Is Plug-In Solar Legal in Maine?

Gray area - check utility   Avg rate ~24¢/kWh

As of 2026, Maine has no specific statewide law that names plug-in or balcony solar, so it sits in the same legal gray area as most of the U.S.: generally not banned, but governed in practice by your utility's interconnection rules rather than a clear state statute. Because electricity here is among the most expensive in the country, even a small plug-in kit can pay for itself unusually fast - this is one of the best states in the U.S. for balcony solar economics. In Maine, residential power mostly comes from Central Maine Power and Versant, and their interconnection or notification policy is the real gatekeeper for a small grid-tied system. Before buying, confirm with them that a plug-in microinverter setup is permitted, stay within any wattage cap they specify, and choose a UL-listed (UL 3700 pathway) kit for safety.

Before you buy in Maine

Call your electric utility and ask: (1) do they allow small plug-in / behind-the-meter grid-tied solar, and (2) is any notification or interconnection form required? Stay within the wattage they specify, use a UL-listed microinverter, and keep written confirmation.

Then estimate your numbers with our savings calculator (pre-loaded with Maine's rate).