Cost to Run a Tankless Electric Water Heater in New Hampshire
New Hampshire's average residential electricity rate is 27.3¢/kWh as of May 2026 — the 43rd cheapest in the country, 48% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $105 per month.
Per hour
$4.91
at 13,000–27,000 W
Per day
$3.44
0.7 hours/day
Per month
$105
383 kWh
Per year
$1,256
4,599 kWh
By usage level in New Hampshire
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.72 | $52.28 | $628 |
| Typical (0.7 hrs/day) | $3.44 | $105 | $1,256 |
| Heavy (1.4 hrs/day) | $6.88 | $209 | $2,511 |
New Hampshire 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 New Hampshire?
At New Hampshire's current average residential rate of 27.3¢/kWh (May 2026), a tankless electric water heater with typical usage costs about $3.44 per day, $105 per month, or $1,256 per year.
Is running a tankless electric water heater in New Hampshire more expensive than average?
Yes. New Hampshire's electricity costs about 48% more than the U.S. average, so the same usage costs $105 per month here versus $70.48 nationally.
What does electricity cost in New Hampshire right now?
New Hampshire residents pay an average of 27.3¢ per kWh as of May 2026 — the 43rd cheapest rate of the 51 U.S. jurisdictions we track.