Cost to Run a Tankless Electric Water Heater in Maine
Maine's average residential electricity rate is 28.6¢/kWh as of May 2026 — the 46th cheapest in the country, 55% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $110 per month.
Per hour
$5.15
at 13,000–27,000 W
Per day
$3.60
0.7 hours/day
Per month
$110
383 kWh
Per year
$1,315
4,599 kWh
By usage level in Maine
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.80 | $54.77 | $658 |
| Typical (0.7 hrs/day) | $3.60 | $110 | $1,315 |
| Heavy (1.4 hrs/day) | $7.21 | $219 | $2,631 |
Maine vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Maine?
At Maine's current average residential rate of 28.6¢/kWh (May 2026), a tankless electric water heater with typical usage costs about $3.60 per day, $110 per month, or $1,315 per year.
Is running a tankless electric water heater in Maine more expensive than average?
Yes. Maine's electricity costs about 55% more than the U.S. average, so the same usage costs $110 per month here versus $70.48 nationally.
What does electricity cost in Maine right now?
Maine residents pay an average of 28.6¢ per kWh as of May 2026 — the 46th cheapest rate of the 51 U.S. jurisdictions we track.