Electricity prices in South Portland, ME
Households in South Portland pay 32.1¢/kWh (Maine average), about $170 a month for 528 kWh a month, the Maine household average. Today's wholesale price in New England (ISO-NE hub) averages 4.5¢/kWh; the cheapest hours are 1 am, 2 am, 3 am.
Monthly electricity bill by consumption
| Consumption | Per month | Per year |
|---|---|---|
| 500 kWh a month | $161 | $1,927 |
| 1,000 kWh a month | $321 | $3,853 |
| 1,500 kWh a month | $482 | $5,780 |
| 2,000 kWh a month | $642 | $7,706 |
At 32.1¢/kWh, the average household price including taxes and fixed charges (August 2026). Small households usually pay a little more per kWh, large ones a little less.
Electricity prices in New England (ISO-NE hub) today
Business electricity in South Portland
Commercial customers pay 21.3¢/kWh and industrial customers 14.2¢/kWh (Maine average).
Home running costs in South Portland
In South Portland, running an 860 sq ft home costs on average $170 a month excluding rent – 103% more expensive than the US average.
Monthly cost breakdown
Default home: 860 sq ft, 2 people, 2,500 kWh electricity a year.
South Portland compared with the average for the United States
Your biggest saving opportunity
Switching from a gas boiler to a heat pump would cut heating costs in South Portland by about $239 a year at today's prices.
Running your washing machine, dishwasher and car charging in the cheapest hours instead of the evening peak saves about 2.1¢/kWh per kWh moved (New England (ISO-NE hub)).
Gas boiler vs heat pump calculator · Monthly home running cost calculator
Heating need through the year
Heating with a gas boiler: about 9,299 kWh a year at 13.3¢/kWh.
Solar potential in South Portland
1 kWp of solar panels produces about 1,473 kWh a year here. ($473 per year)
Not yet available for South Portland: Water.
How we calculate this
Electricity: average residential price per kWh in the state (August 2026). Heating: heating degree days for the location × floor area × building factor, priced with the gas boiler cost (state residential natural gas price). Water and rent are added when official data is available. Methodology
Nearby cities
More cities in Maine
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