Cost to Run a Tankless Electric Water Heater in South Dakota
South Dakota's average residential electricity rate is 15.7¢/kWh as of May 2026 — the 21st cheapest in the country, 15% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $60.14 per month.
Per hour
$2.83
at 13,000–27,000 W
Per day
$1.98
0.7 hours/day
Per month
$60.14
383 kWh
Per year
$722
4,599 kWh
By usage level in South Dakota
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.99 | $30.07 | $361 |
| Typical (0.7 hrs/day) | $1.98 | $60.14 | $722 |
| Heavy (1.4 hrs/day) | $3.96 | $120 | $1,444 |
South Dakota 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 South Dakota?
At South Dakota's current average residential rate of 15.7¢/kWh (May 2026), a tankless electric water heater with typical usage costs about $1.98 per day, $60.14 per month, or $722 per year.
Is running a tankless electric water heater in South Dakota more expensive than average?
No — it's cheaper. South Dakota's rate is about 15% below the U.S. average: $60.14 per month here versus $70.48 nationally.
What does electricity cost in South Dakota right now?
South Dakota residents pay an average of 15.7¢ per kWh as of May 2026 — the 21st cheapest rate of the 51 U.S. jurisdictions we track.