Is Plug-In Solar Legal in Delaware?

Gray area - check utility   Avg rate ~17¢/kWh

As of 2026, Delaware 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. With roughly average electricity prices, a plug-in kit delivers steady savings and a typical payback in the mid-single-digit years. In Delaware, residential power mostly comes from Delmarva Power, 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 Delaware

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 Delaware's rate).