Cost to Run a Tankless Electric Water Heater in Maine
Maine's average residential electricity rate is 28.4¢/kWh as of April 2026 — the 46th cheapest in the country, 51% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $109 per month.
Per hour
$5.11
at 13,000–27,000 W
Per day
$3.58
0.7 hours/day
Per month
$109
383 kWh
Per year
$1,306
4,599 kWh
By usage level in Maine
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.79 | $54.39 | $653 |
| Typical (0.7 hrs/day) | $3.58 | $109 | $1,306 |
| Heavy (1.4 hrs/day) | $7.16 | $218 | $2,612 |
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 28.4¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $3.58 per day, $109 per month, or $1,306 per year.
Is running a tankless electric water heater in Maine more expensive than average?
Yes. Maine's electricity costs about 51% more than the U.S. average, so the same usage costs $109 per month here versus $72.01 nationally.
What does electricity cost in Maine right now?
Maine residents pay an average of 28.4¢ per kWh as of April 2026 — the 46th cheapest rate of the 51 U.S. jurisdictions we track.