Score breakdown: 57/100
RatingPlate Score. Based on EIA energy prices, ENERGY STAR data, state rebate programs, and permit research. Not a government rating or purchasing recommendation. FAQ
South Carolina electricity is 12% below the national average. Here's what that means for heat pump operating costs.
Running cost in South Carolina
At South Carolina's 15.4¢/kWh electricity rate, the most efficient heat pump water heater saves an estimated $565 per year compared to a standard electric tank.
South Carolina electricity
15.4¢
per kWh (EIA, Jan 2026)
Best HP annual cost
$128
A. O. Smith HPTS-50-2
Electric resistance
$693
~4,500 kWh/yr baseline
Gas tank baseline
$316
~200 therms/yr
Warmer inlet water (64°F annual average) means heat pump efficiency may exceed rated UEF in South Carolina. Less temperature rise needed, lower energy consumption.
Why South Carolina changes the call
01Energy costSouth Carolina electricity is 12% below the national average. That directly affects how much a heat pump saves compared to a standard electric tank.
02Climate impactIncoming water averages 64°F annually and drops to about 54°F in winter. Colder water means the heat pump works harder and real efficiency is slightly lower than rated.
03Available incentivesState and utility rebates can significantly change the payback period. Check what's currently available before finalizing your decision.
Rebates in South Carolina
South Carolina has 1 rebate program as of March 2026.
The federal $2,000 tax credit (IRA Section 25C) expired December 31, 2025. State and utility rebates listed below may still be available. Verify current status at the links provided.
Duke Energy Carolinas / Dominion Energy SC Rebates
$200-$350
IRA HEAR Rebate (Point-of-Sale)
Not yet available in South Carolina as of March 2026. Up to $1,750 for income-qualified households when available.
South Carolina has not yet launched its IRA HOMES or HEAR rebate programs.
Install requirements in South Carolina
Electrical
Dedicated 240V, 30A circuit (most models). Some newer 120V plug-in models exist but most residential units require 240V. Check the unit's nameplate for exact requirements.
Condensate drain
Heat pump water heaters produce condensate during operation. A condensate drain line to an approved location (floor drain, condensate pump, or exterior) is required.
Air space
Approximately 700 cubic feet of surrounding air (roughly a 10x10x7-foot room). The heat pump extracts heat from surrounding air. Insufficient air volume reduces efficiency and can cause the unit to underperform. Some manufacturers allow ducting to supplement air supply in smaller spaces.
Noise
Heat pump water heaters produce operational noise similar to a window AC unit (45-55 dB). Consider placement away from bedrooms.
Best fits for South Carolina
A smaller set of representative fits using South Carolina's 15.4¢/kWh rate. Curated to show different trade-offs instead of listing every published model on every state page. See the full heat pump lineup.
Common questions: South Carolina
Is a heat pump water heater worth it in South Carolina?
Yes. South Carolina scores B on RatingPlate's analysis, with estimated savings of $565 per year compared to a standard electric tank. Payback on the higher upfront cost is roughly 4.2 years before rebates.
What rebates are available for heat pump water heaters in South Carolina?
South Carolina has 1 rebate program. The IRA HEAR program has not launched in South Carolina yet. Verify amounts and eligibility at the links in the rebates section above.
How much does a heat pump water heater cost to run in South Carolina?
At South Carolina's electricity rate of 15.4 cents per kWh, the most efficient heat pump water heater costs about $128/yr to run. A standard electric tank costs about $693 per year.
Do I need a permit for a heat pump water heater in South Carolina?
South Carolina does not have unusual state-level requirements beyond standard plumbing and mechanical permits. Check with your local building department for jurisdiction-specific rules.
What is the payback period for a heat pump water heater in South Carolina?
Without rebates, the payback period in South Carolina is approximately 4.2 years based on $565 in annual savings versus a standard electric tank. With available rebates, payback could be significantly shorter.
Your next click
Sources
Electricity and natural gas rates: U.S. Energy Information Administration, residential sector (EIA, Jan 2026).
Rebate data compiled from state energy offices, utility program pages, DSIRE, and ENERGY STAR. Rebate amounts and eligibility change frequently. Verify at listed program URLs.
Inlet water temperatures estimated from NOAA climate normals using the Burch-Christensen mains water temperature model (NREL).
Model specifications from ENERGY STAR certified product data and manufacturer spec sheets.
Page generated April 24, 2026. Data freshness varies by source.
