Cost to Run a Tankless Electric Water Heater in Arizona
Arizona's average residential electricity rate is 15.4¢/kWh as of July 2026 — the 18th cheapest in the country, 16% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $58.99 per month.
Per hour
$2.77
at 13,000–27,000 W
Per day
$1.94
0.7 hours/day
Per month
$58.99
383 kWh
Per year
$708
4,599 kWh
By usage level in Arizona
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.97 | $29.49 | $354 |
| Typical (0.7 hrs/day) | $1.94 | $58.99 | $708 |
| Heavy (1.4 hrs/day) | $3.88 | $118 | $1,416 |
Arizona 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 Arizona?
At Arizona's current average residential rate of 15.4¢/kWh (July 2026), a tankless electric water heater with typical usage costs about $1.94 per day, $58.99 per month, or $708 per year.
Is running a tankless electric water heater in Arizona more expensive than average?
No — it's cheaper. Arizona's rate is about 16% below the U.S. average: $58.99 per month here versus $70.10 nationally.
What does electricity cost in Arizona right now?
Arizona residents pay an average of 15.4¢ per kWh as of July 2026 — the 18th cheapest rate of the 51 U.S. jurisdictions we track.