Where Maine Gets Its Electricity
Net generation by source · 12-month average, June 2025 – May 2026.
Generation mix
| Source | Share | Generation |
|---|---|---|
| Natural gas | 37.7% | 5,755 GWh |
| Coal | 0.2% | 24 GWh |
| Nuclear | 0.0% | 0 GWh |
| Wind | 19.4% | 2,956 GWh |
| Solar | 10.6% | 1,615 GWh |
| Hydro | 16.6% | 2,539 GWh |
| Other | 15.5% | 2,366 GWh |
15.3 TWh generated over the 12 months to May 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 1,409 GWh that way. Counting it on both sides of the ratio takes solar from 10.6% to 18.1%.
How the mix has shifted since 2016
| Source | 2016 | 2025 | Change |
|---|---|---|---|
| Natural gas | 30.4% | 37.5% | +7.1 pts |
| Coal | 0.6% | 0.2% | −0.4 pts |
| Nuclear | 0.0% | 0.0% | — |
| Wind | 14.5% | 19.4% | +4.9 pts |
| Solar | 0.0% | 10.4% | +10.4 pts |
| Hydro | 26.1% | 17.8% | −8.3 pts |
| Other | 28.5% | 14.7% | −13.8 pts |
Compared with the U.S. and nearby states
| Where | Renewable | Carbon-free | Largest source |
|---|---|---|---|
| Maine | 58.0% | 58.0% | Natural gas 37.7% |
| U.S. average | 24.9% | 42.6% | Natural gas 40.8% |
| New Hampshire | 13.6% | 66.5% | Nuclear |
Maine's generation mix in context
Natural gas supplied 37.7% of Maine's electricity generation since June 2025, making it the largest source. Renewable sources accounted for 58% of generation, and because renewable generation and nuclear power together make up the state's carbon-free electricity, that figure is also 58%. These shares place Maine 8th among the 51 states and DC for renewable electricity and 11th for solar.
The solar share reported by the EIA is 10.6%, but when rooftop solar installations are included alongside utility-scale solar in both the numerator and denominator, the share rises to 18.1%. Wind generated 19.4% and hydroelectric power 16.6%. Over the ten years from 2016 to 2025, renewable generation declined from 64.7% in 2016 to 59.3% in 2025, a drop of 5.4 percentage points, as hydroelectric output fell sharply from 26.1% to 17.8%. Wind grew from 14.5% to 19.4%, and solar emerged from nothing to reach 10.4% of generation. Natural gas expanded from 30.4% in 2016 to 37.5% in 2025.
Maine's renewable share significantly exceeds the national average of 24.9%, a difference of 33.1 percentage points. Its natural gas share is slightly lower than the national 40.8%. New Hampshire, the only bordering state in the data, generates a much smaller renewable share at 13.6%..
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 May 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.