Cost to Run a Portable Air Conditioner 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 (8 hours/day), a portable air conditioner here costs $37.70 per month.
Per hour
$0.15
at 700–1,500 W
Per day
$1.24
8 hours/day
Per month
$37.70
243 kWh
Per year
$453
2,920 kWh
By usage level in South Carolina
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (4 hrs/day) | $0.62 | $18.85 | $226 |
| Typical (8 hrs/day) | $1.24 | $37.70 | $453 |
| Heavy (16 hrs/day) | $2.48 | $75.39 | $905 |
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 15.5¢/kWh (July 2026), a portable air conditioner with typical usage costs about $1.24 per day, $37.70 per month, or $453 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 15% below the U.S. average: $37.70 per month here versus $44.51 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.