Cost to Run a Tankless Electric Water Heater in South Carolina
South Carolina's average residential electricity rate is 15.5¢/kWh as of July 2026 — the 20th cheapest in the country, 15% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $59.37 per month.
Per hour
$2.79
at 13,000–27,000 W
Per day
$1.95
0.7 hours/day
Per month
$59.37
383 kWh
Per year
$713
4,599 kWh
By usage level in South Carolina
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.98 | $29.69 | $356 |
| Typical (0.7 hrs/day) | $1.95 | $59.37 | $713 |
| Heavy (1.4 hrs/day) | $3.91 | $119 | $1,426 |
South Carolina 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 Carolina?
At South Carolina's current average residential rate of 15.5¢/kWh (July 2026), a tankless electric water heater with typical usage costs about $1.95 per day, $59.37 per month, or $713 per year.
Is running a tankless electric water heater in South Carolina more expensive than average?
No — it's cheaper. South Carolina's rate is about 15% below the U.S. average: $59.37 per month here versus $70.10 nationally.
What does electricity cost in South Carolina right now?
South Carolina residents pay an average of 15.5¢ per kWh as of July 2026 — the 20th cheapest rate of the 51 U.S. jurisdictions we track.