Cost to Run a Tankless Electric Water Heater in Tennessee
Tennessee's average residential electricity rate is 14.5¢/kWh as of May 2026 — the 12th cheapest in the country, 21% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $55.54 per month.
Per hour
$2.61
at 13,000–27,000 W
Per day
$1.83
0.7 hours/day
Per month
$55.54
383 kWh
Per year
$667
4,599 kWh
By usage level in Tennessee
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.91 | $27.77 | $333 |
| Typical (0.7 hrs/day) | $1.83 | $55.54 | $667 |
| Heavy (1.4 hrs/day) | $3.65 | $111 | $1,334 |
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 14.5¢/kWh (May 2026), a tankless electric water heater with typical usage costs about $1.83 per day, $55.54 per month, or $667 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: $55.54 per month here versus $70.48 nationally.
What does electricity cost in Tennessee right now?
Tennessee residents pay an average of 14.5¢ per kWh as of May 2026 — the 12th cheapest rate of the 51 U.S. jurisdictions we track.