Heat Pump Water Heater in Charleston — $160/yr to Run (14.6¢/kWh)
Your heat pump water heater in Charleston costs about $13/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
$0.44
3.0 kWh/day
Monthly Cost
$13.31
91 kWh/mo
Annual Cost
$160
1,095 kWh/yr
Lifetime (15yr)
$2,396
energy only
Monthly Cost Breakdown in Charleston
| Period | kWh | Charleston Cost | National Avg | Difference |
|---|---|---|---|---|
| Daily | 3.0 | $0.44 | $0.39 | +$0.05 |
| Weekly | 21.0 | $3.06 | $2.73 | +$0.33 |
| Monthly | 91.3 | $13.31 | $11.86 | +$1.45 |
| Quarterly | 273.8 | $39.94 | $35.59 | +$4.35 |
| Annual | 1095.0 | $159.76 | $142.35 | +$17.41 |
Customize Your Heat Pump Water Heater Cost
Adjust usage hours and electricity rate to calculate your exact cost in Charleston.
Daily
$0.44
Monthly
$13.31
Annual
$160
15-Year
$2,396
Energy Saving Tips for Heat Pump Water Heater in Charleston
- ✓Charleston electricity rates are 12% above the national average — energy efficiency matters more here.
- ✓An ENERGY STAR Heat Pump Water Heater in Charleston saves ~$48/year compared to standard models.
- ✓A smart Heat Pump Water Heater with scheduling optimization can save ~$32/year at Charleston rates.
- ✓Keep in a warm area like a garage
- ✓Dont block airflow around unit
- ✓Use heat pump only mode for max savings
ENERGY STAR Savings: Upgrading to an ENERGY STAR Heat Pump Water Heater in Charleston saves approximately $48/year at local rates — $719 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
Heat Pump Water Heater Cost in Other South Carolina Cities
| City | Rate | Annual Cost | vs Charleston |
|---|---|---|---|
| Charleston (current) | 14.6¢ | $160 | — |
| Columbia | 13.4¢ | $147 | $-13 |
| North Charleston | 13.6¢ | $149 | $-11 |
| Mount Pleasant | 13.0¢ | $142 | $-17 |
| Rock Hill | 11.7¢ | $128 | $-32 |
| Greenville | 15.0¢ | $165 | +$5 |
| Summerville | 14.4¢ | $158 | $-2 |
Heat Pump Water Heater Energy Cost FAQ — Charleston, SC
Understanding Heat Pump Water Heater 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 Heat Pump Water Heater (500W) at Charleston's rate of 14.6¢/kWh costs approximately $160 per year — $17 more than the national average of $142.
Charleston rates are 12% above the national average — a modest premium that adds $17 per year to Heat Pump Water Heater operating costs. Over the appliance's 15-year lifespan, that's $261 in cumulative extra spending versus the national average.
With a cost of living index of 97, Charleston is near the national median. The Heat Pump Water Heater's monthly cost of $13.31 represents a typical share of the average Charleston electric bill of $157/month. Upgrading to an ENERGY STAR Heat Pump Water Heater can cut energy use by up to 30%, saving approximately $48 per year at Charleston rates.
Charleston's moderate climate (avg 66.2°F) helps keep seasonal energy cost swings manageable for most appliances. A Heat Pump Water Heater produces approximately 0.78 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 Heat Pump Water Heater in Charleston, SC?
At Charleston's average electricity rate of 14.6¢/kWh, a Heat Pump Water Heater costs approximately $160 per year to run. That's about $13.31 per month with typical usage of 6 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 Heat Pump Water Heater use per year?
A Heat Pump Water Heater uses approximately 500 watts and consumes about 1,095 kWh per year with typical usage of 6 hours/day for 365 days/year.
Is a Heat Pump Water Heater expensive to run in Charleston?
Compared to the national average cost of $142/year, running a Heat Pump Water Heater in Charleston costs $17 more per year due to higher local electricity rates.
How can I reduce my Heat Pump Water Heater energy cost in Charleston?
To reduce Heat Pump Water Heater costs in Charleston: Keep in a warm area like a garage. Dont block airflow around unit. Upgrading to an ENERGY STAR model saves up to 30% on energy costs. Also check with Duke Energy Carolinas for local energy efficiency rebates and programs.