Where Maine Gets Its Electricity
Net generation by source · 12-month average, July 2025 – June 2026.
Generation mix
| Source | Share | Generation |
|---|---|---|
| Natural gas | 37.8% | 5,756 GWh |
| Coal | 0.2% | 24 GWh |
| Nuclear | 0.0% | 0 GWh |
| Wind | 19.4% | 2,959 GWh |
| Solar | 10.8% | 1,640 GWh |
| Hydro | 16.5% | 2,510 GWh |
| Other | 15.4% | 2,350 GWh |
15.2 TWh generated over the 12 months to June 2026. Shares are of net generation within Maine, which is not the same as what the state consumes — power crosses state lines.
Counting rooftop solar
EIA reports small-scale solar — mostly rooftop panels on homes and businesses — separately, and leaves it out of the state generation total that the mix above is a share of. Maine generated 1,424 GWh that way. Counting it on both sides of the ratio takes solar from 10.8% to 18.4%.
How the mix has shifted since 2001
| Source | 2001 | 2025 | Change |
|---|---|---|---|
| Natural gas | 51.4% | 37.5% | −13.9 pts |
| Coal | 2.7% | 0.2% | −2.5 pts |
| Nuclear | 0.0% | 0.0% | — |
| Wind | 0.0% | 19.4% | +19.4 pts |
| Solar | 0.0% | 10.4% | +10.4 pts |
| Hydro | 13.5% | 17.8% | +4.3 pts |
| Other | 32.4% | 14.7% | −17.7 pts |
Compared with the U.S. and nearby states
| Where | Renewable | Carbon-free | Largest source |
|---|---|---|---|
| Maine | 58.1% | 58.1% | Natural gas 37.8% |
| U.S. average | 25.2% | 42.9% | Natural gas 40.7% |
| New Hampshire | 13.5% | 66.4% | Nuclear |
Maine's generation mix in context
Natural gas supplied 37.7% of Maine's electricity generation since June 2025, the largest source in the state's mix. Renewable energy accounted for 58% of generation, placing Maine eighth among the 51 states and DC. Solar's share depends on the measurement: utility-scale solar alone made up 10.6%, but including rooftop solar raises the total to 18.1%. Wind generated 19.4%, hydro 16.6%, and other sources—a remainder holding geothermal, biomass, petroleum, other gases and pumped storage—made up 15.5%.
Maine's renewable share significantly exceeds the national figure of 24.9%, a difference of 33.1 percentage points. Natural gas makes up a slightly smaller share than the 40.8% national average. The single bordering state with generation data, New Hampshire, has a lower renewable share at 13.6%, with nuclear as its largest source.
Since 2001, Maine's generation mix has shifted substantially. Renewable generation rose from 33.1% in 2001 to 59.3% in 2025, driven by wind increasing from 0% to 19.4% and solar from 0% to 10.4%. Natural gas fell from 51.4% to 37.5%, coal shrank from 2.7% to 0.2%, and hydro grew from 13.5% to 17.8%, while other sources declined from 32.4% to 14.7%.
Written from the EIA figures on this page, covering data through May 2026.
Frequently asked questions
›What percentage of Maine's electricity comes from renewable energy?
›What percentage of Maine's power comes from solar?
›Where does Maine get most of its electricity?
›Does Maine still burn coal for electricity?
›Is Maine getting greener?
How this is measured
Figures are net generation reported to the U.S. Energy Information Administration for all sectors — utilities, independent power producers, and industrial and commercial plants that generate their own power. Shares are of the 12 months to June 2026, rather than a single month, because generation is strongly seasonal: solar peaks in summer and hydro with the spring melt, so one month says more about the weather than about the grid.
“Other” is the reported total minus the six named sources, so the shares add to exactly 100%. It holds geothermal, biomass, petroleum, other gases, and pumped storage — the last of which consumes more electricity than it returns, and so can be negative. Geothermal and biomass are renewable, which is why the renewable share above is slightly larger than wind, solar and hydro added together.
This is generation, not consumption. Electricity crosses state lines freely, so a state can generate more than it uses or rely on imports for a large part of its supply; neither shows up here.