Smart Thermostat in Charleston — $6/yr to Run (14.6¢/kWh)
Your smart thermostat in Charleston costs about $1/month at 14.6¢/kWh. See daily, monthly, and yearly costs, plus tips to cut your bill.
Charleston, SC Electricity Rate
14.6¢/kWh
Utility: Duke Energy Carolinas
+12% vs national avg
National avg: 13.0¢/kWh
Daily Cost
$0.02
0.1 kWh/day
Monthly Cost
$0.53
4 kWh/mo
Annual Cost
$6
44 kWh/yr
Lifetime (10yr)
$64
energy only
Monthly Cost Breakdown in Charleston
| Period | kWh | Charleston Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 0.1 | $0.02 | $0.02 | +$0.00 |
| Weekly | 0.8 | $0.12 | $0.11 | +$0.01 |
| Monthly | 3.6 | $0.53 | $0.47 | +$0.06 |
| Quarterly | 10.9 | $1.60 | $1.42 | +$0.17 |
| Annual | 43.8 | $6.39 | $5.69 | +$0.70 |
Customize Your Smart Thermostat Cost
Adjust usage hours and electricity rate to calculate your exact cost in Charleston.
Daily
$0.02
Monthly
$0.53
Annual
$6
10-Year
$64
Energy Saving Tips for Smart Thermostat in Charleston
- ✓Charleston electricity rates are 12% above the national average — energy efficiency matters more here.
- ✓An ENERGY STAR Smart Thermostat in Charleston saves ~$1/year compared to standard models.
- ✓A smart Smart Thermostat with scheduling optimization can save ~$1/year at Charleston rates.
- ✓Charleston's warm climate (avg 66.2°F) means higher cooling costs — consider ceiling fans to supplement.
- ✓Enable learning features
- ✓Set schedules based on occupancy
ENERGY STAR Savings: Upgrading to an ENERGY STAR Smart Thermostat in Charleston saves approximately $1/year at local rates — $15 over the appliance lifetime.
Highest-Cost Appliances in Charleston, SC
See which appliances cost the most to run at Charleston's 14.6¢/kWh electricity rate.
Level 2 EV Charger (240V)
Transportation · 7,200W
$1,891/yr
$157.57/mo
Electric Furnace
HVAC · 10,000W
$1,313/yr
$109.42/mo
Electric Tankless Water Heater
Water Heating · 18,000W
$959/yr
$79.88/mo
EV Charger (Level 2)
Garage · 7,200W
$945/yr
$78.79/mo
Boiler (Electric)
HVAC · 6,000W
$788/yr
$65.66/mo
Electric Water Heater (Tank)
Water Heating · 4,500W
$719/yr
$59.91/mo
Water Heater (Tank Electric)
Water Heating · 4,500W
$719/yr
$59.91/mo
Heat Pump
HVAC · 2,400W
$560/yr
$46.69/mo
Smart Thermostat Cost in Other South Carolina Cities
| City | Rate | Annual Cost | vs Charleston |
|---|---|---|---|
| Charleston (current) | 14.6¢ | $6 | — |
| Columbia | 13.4¢ | $6 | $-1 |
| North Charleston | 13.6¢ | $6 | $-0 |
| Mount Pleasant | 13.0¢ | $6 | $-1 |
| Rock Hill | 11.7¢ | $5 | $-1 |
| Greenville | 15.0¢ | $7 | +$0 |
| Summerville | 14.4¢ | $6 | $-0 |
Smart Thermostat Energy Cost FAQ — Charleston, SC
Understanding Smart Thermostat Energy Costs in Charleston, SC
Charleston is a mid-sized South Carolina city where residential electricity rates from Duke Energy Carolinas are shaped by regional energy supply and local demand patterns. Running a low-draw appliance like the Smart Thermostat (5W) at Charleston's rate of 14.6¢/kWh costs approximately $6 per year — $1 more than the national average of $6.
Charleston rates are 12% above the national average — a modest premium that adds $1 per year to Smart Thermostat operating costs. Over the appliance's 10-year lifespan, that's $7 in cumulative extra spending versus the national average.
With a cost of living index of 97, Charleston is near the national median. The Smart Thermostat's monthly cost of $0.53 represents a typical share of the average Charleston electric bill of $157/month. Upgrading to an ENERGY STAR Smart Thermostat can cut energy use by up to 23%, saving approximately $1 per year at Charleston rates.
Charleston's moderate climate (avg 66.2°F) helps keep seasonal energy cost swings manageable for most appliances. A Smart Thermostat produces approximately 0.03 tons of CO2 annually at typical usage. Charleston residents can reduce this footprint by choosing an ENERGY STAR certified unit, optimizing usage patterns, or investing in solar — see our solar savings calculator for Charleston.
Compare All Energy Costs in Charleston
See energy costs for 178+ household appliances at Charleston's local electricity rate.
Frequently Asked Questions
How much does it cost to run a Smart Thermostat in Charleston, SC?
At Charleston's average electricity rate of 14.6¢/kWh, a Smart Thermostat costs approximately $6 per year to run. That's about $0.53 per month with typical usage of 24 hours per day.
What is the electricity rate in Charleston, SC?
The average residential electricity rate in Charleston, SC is 14.6¢/kWh, which is 12% above the national average of 13.0¢/kWh. The primary utility provider is Duke Energy Carolinas.
How much electricity does a Smart Thermostat use per year?
A Smart Thermostat uses approximately 5 watts and consumes about 44 kWh per year with typical usage of 24 hours/day for 365 days/year.
Is a Smart Thermostat expensive to run in Charleston?
Compared to the national average cost of $6/year, running a Smart Thermostat in Charleston costs $1 more per year due to higher local electricity rates.
How can I reduce my Smart Thermostat energy cost in Charleston?
To reduce Smart Thermostat costs in Charleston: Enable learning features. Set schedules based on occupancy. Upgrading to an ENERGY STAR model saves up to 23% on energy costs. Also check with Duke Energy Carolinas for local energy efficiency rebates and programs.