Eversource solar payback

Massachusetts has some of the most expensive electricity in America — about 30 cents per kilowatt-hour — and that is exactly why solar pencils out here better than in sunnier, cheaper states. A typical system costs $2.90 per watt in 2026, or about $32,067 for the 11.05 kW average, and pays for itself in roughly 7 years even with the federal credit gone. This guide prices every system size from 4 kW to 12 kW, compares Boston, Cambridge, Worcester and the Cape, explains net metering and the new SMART 3.0 payment in plain English, and works the payback math separately for Eversource, National Grid, and Unitil customers — because in Massachusetts, your utility decides more about your return than your roof does.