Cost to Run a Portable Air Conditioner 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 (8 hours/day), a portable air conditioner here costs $39.40 per month.
Per hour
$0.16
at 700–1,500 W
Per day
$1.30
8 hours/day
Per month
$39.40
243 kWh
Per year
$473
2,920 kWh
By usage level in South Carolina
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.65 | $19.70 | $237 |
| Typical (8 hrs/day) | $1.30 | $39.40 | $473 |
| Heavy (16 hrs/day) | $2.59 | $78.80 | $946 |
South Carolina vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a portable air conditioner in South Carolina?
At South Carolina's current average residential rate of 16.2¢/kWh (May 2026), a portable air conditioner with typical usage costs about $1.30 per day, $39.40 per month, or $473 per year.
Is running a portable air conditioner in South Carolina more expensive than average?
No — it's cheaper. South Carolina's rate is about 12% below the U.S. average: $39.40 per month here versus $44.75 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.