Cost to Run a Tankless Electric Water Heater in South Carolina
South Carolina's average residential electricity rate is 16.2¢/kWh as of May 2026 — the 25th cheapest in the country, 12% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $62.05 per month.
Per hour
$2.92
at 13,000–27,000 W
Per day
$2.04
0.7 hours/day
Per month
$62.05
383 kWh
Per year
$745
4,599 kWh
By usage level in South Carolina
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.02 | $31.03 | $373 |
| Typical (0.7 hrs/day) | $2.04 | $62.05 | $745 |
| Heavy (1.4 hrs/day) | $4.08 | $124 | $1,490 |
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 16.2¢/kWh (May 2026), a tankless electric water heater with typical usage costs about $2.04 per day, $62.05 per month, or $745 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 12% below the U.S. average: $62.05 per month here versus $70.48 nationally.
What does electricity cost in South Carolina right now?
South Carolina residents pay an average of 16.2¢ per kWh as of May 2026 — the 25th cheapest rate of the 51 U.S. jurisdictions we track.