Cost to Run a Tankless Electric Water Heater in Tennessee
Tennessee's average residential electricity rate is 14.9¢/kWh as of April 2026 — the 15th cheapest in the country, 21% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $57.07 per month.
Per hour
$2.68
at 13,000–27,000 W
Per day
$1.88
0.7 hours/day
Per month
$57.07
383 kWh
Per year
$685
4,599 kWh
By usage level in Tennessee
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.94 | $28.54 | $343 |
| Typical (0.7 hrs/day) | $1.88 | $57.07 | $685 |
| Heavy (1.4 hrs/day) | $3.75 | $114 | $1,371 |
Tennessee 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 Tennessee?
At Tennessee's current average residential rate of 14.9¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $1.88 per day, $57.07 per month, or $685 per year.
Is running a tankless electric water heater in Tennessee more expensive than average?
No — it's cheaper. Tennessee's rate is about 21% below the U.S. average: $57.07 per month here versus $72.01 nationally.
What does electricity cost in Tennessee right now?
Tennessee residents pay an average of 14.9¢ per kWh as of April 2026 — the 15th cheapest rate of the 51 U.S. jurisdictions we track.