Charleston, SC Heat Pump Leasing & Installation
In this guide
01
Benefits of Palmetto Heat Pumps
Say goodbye to clunky old systems and surprise repairs. Palmetto Comfort Plan gives you a brand-new heat pump, installation, and full support, all wrapped into one subscription.
Year Round Comfort
A high-efficiency heat pump keeps your home cool in summer, warm in winter, and your energy use in check all year long.
Forget the maintenance
With a Comfort Plan subscription, installation and maintenance are fully covered, no surprise bills, no weekend DIY.
Rewards for renewing
Stick with us and earn credits toward your next system upgrade. It’s our way of saying thanks for building a cleaner, comfier future with us.
02
Charleston, SC Heat Pump Load Calculator
Use this calculator’s square-foot method to estimate your home’s heating and cooling needs. It uses a 72°F indoor temperature, 97°F cooling design temperature, and 24°F heating design temperature—the ACCA-standard design conditions for Charleston, SC. For an official Manual J load calculation and quote, get in touch with Palmetto’s team. Get in touch with our team for an official quote.
Step 1 of 3
Home location & size
Your home’s location and size directly impact heating needs.
Step 2 of 3
Home attributes
Step 3 of 3
Additional details
Description of what this means for context.
Estimated Heating Needs
Your home’s location falls within the a climate zone with the average extreme winter falling between 10° – 15° F.
Home Details
Recommended equipment capacity
60,000 BTU
5 Tons
Calculated Cooling Mode
102,000 BTU
8.5 Tons
03
Buy it or finance it. Your comfort, your call
There's no wrong way to get cozy. Here's how the options stack up, so you can choose what works best for you.
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Cash |
Loan |
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|---|---|---|---|
| Payment schedule | $0 upfront, then monthly subscription | Full price upfront | $0 upfront, then monthly payment |
| Term length | 10 or 12 years | None | Variable |
| End of term options | Flexible with 25% renewal term credits to new system | No credits to new system | No credits to new system |
| Maintenance included | |||
| Eligible for incentives |
Cash
Loan
Local Incentives
Charleston, SC Heat Pump Rebates & Incentives
Local and federal incentive programs can significantly reduce the cost of a new heat pump system. Here are the programs available to Charleston homeowners.
Dominion Heating and Cooling Rebates
$400 - $500Rebates are available for qualifying ENERGY STAR central heat pumps installed in eligible homes.
Berkeley Dual Fuel Rebate
$500 - $1,000Berkeley Electric offers rebates for eligible conversions to a dual-fuel heat pump system.
Eligible Dominion Energy South Carolina customers may receive $400-$500 for qualifying heat pumps, while Berkeley Electric members may receive $500-$1,000 for eligible dual-fuel conversions. South Carolina’s HOMES and HEAR rebates are not currently available; utility territory and equipment rules apply, and Palmetto can help homeowners identify applicable programs, prepare applications, and maximize eligible savings.
Incentive information is based on publicly available data as of 2026 and may change. Contact program administrators to verify current availability and eligibility requirements.
04
Climate Zones
Charleston is in USDA Hardiness Zone 9, with generally mild winters and occasional cold snaps, followed by long, hot, humid summers. The zone’s design temperatures—24°F for heating and 97°F for cooling—help guide heat pump sizing and selection for both seasonal extremes. Palmetto understands Charleston’s climate and can recommend a system suited to local conditions. Explore other climate zones below or enter your ZIP code to confirm your zone.
Climate Zone 1
Climate zone 1 is not typically seen within the United States outside of Alaska. It represents the coldest climates on the planet.
Climate Zone 1A
Avg. extreme winters: -60° to -55° F
Climate Zone 1B
Avg. extreme winters: -55° to -50° F
Charleston Electricity Prices
For Charleston homeowners, a closer look at electricity prices can help put heating and cooling choices in perspective.
South Carolina’s average electricity price rose from 12.9¢ per kWh in 2021 to 14.1¢ in 2024—about 9%. It remained below the U.S. average, which reached 16.5¢ in 2024.
Heat pumps can deliver two to three times more heating or cooling per unit of electricity than traditional HVAC systems, potentially helping Charleston households use less power to stay comfortable.
Over time, using less electricity for the same comfort can help soften the impact of future rate increases. Actual savings depend on your home, system, usage, and utility rates.
Price of Energy: South Carolina vs National Average
Charleston Area Utility Providers
Charleston-area electricity rates vary by utility. The latest available figures are from 2023, since 2024 data isn’t available: Berkeley Electric Cooperative was 14.1¢/kWh, Santee Cooper 11.4¢, and Dominion Energy 14.4¢.
In 2023, Berkeley Electric Cooperative and Dominion Energy were above South Carolina’s 13.70¢ average but below the 16.0¢ national average. Santee Cooper was below both. These figures show differences, not what caused them.
Your bill also depends on how much electricity your home uses. Heat pumps use electricity efficiently to heat and cool, so they can reduce total energy spending compared with traditional HVAC—even where electricity prices are higher.
Charleston Utilities Electricity Rates
Let our smart tools do the heavy lifting.
Get personalized tips, usage insights, project tracking, and that daily satisfaction of making your energy work smarter with the Palmetto mobile app.
- Rewards for smarter energy usage
- Energy insights & Dashboard
- Personalized Savings Tools
- Whole Home Energy Management
- Support Whenever You Need It
Repair versus replace
When a heat pump is in need of repair it is worth considering whether a replacement would be a better investment. While each case is unique, we generally recommend investing in a new unit when repairs exceed $5,000.
A heat pump's lifetime is impacted by a number of factors including environment, use and the quality of the unit. It's important to choose the right unit for your climate zone and home's unique attributes.
When you are in need of repair, we recommend choosing a service provider that is an expert in the heat pump brand you have installed, and checking online reviews to ensure you are investing in the right level of service.
| Potential repair | Cost range | Description |
|---|---|---|
| Capacitor Replacement | $150 - $400 | Common issue when unit struggles to start or makes a humming noise. Capacitors store the electrical energy needed to start the compressor and fan motors. |
| Refrigerant Recharge | $250 - $750 | Needed when the system loses cooling or heating efficiency due to low refrigerant levels. Includes leak detection, repair of minor leaks, and recharging the system to the manufacturer-specified level. |
| Reversing Valve Replacement | $450 - $900 | Required when the unit cannot switch between heating and cooling modes. The reversing valve directs refrigerant flow and is unique to heat pump systems. |
| Compressor Replacement | $1,500 - $3,000 | Major repair needed when the unit fails to heat or cool entirely. The compressor is the heart of the system, circulating refrigerant between the indoor and outdoor coils. |
| Evaporator/Condenser Coil Replacement | $1,200 - $2,800 | Replacement needed when coils develop leaks or corrosion that cannot be economically repaired. Coil damage reduces heat transfer efficiency and can cause refrigerant loss. |
| Control Board Replacement | $500 - $1,200 | Required when the system has electrical failures or erratic behavior. The control board manages all system operations including defrost cycles, fan speeds, and compressor staging. |
| Full System Replacement | $4,500 - $8,000+ | When repairs exceed the value of the unit or multiple major components fail simultaneously. Includes removal of the old system and installation of a new heat pump with updated refrigerant lines and electrical connections. |
Frequently Asked Questions
Yes. Heat pumps can make sense in Charleston because they provide both heating and cooling, and the area’s relatively mild winters let them operate efficiently for much of the year. Systems should still be sized for local design conditions: about 24°F for heating and 97°F for cooling. At 14.1¢/kWh, operating cost depends on usage and equipment efficiency.
Homeowners can choose Palmetto’s Comfort Plan, with no upfront cost and maintenance and repairs included for the plan’s life, or buy the system outright and potentially qualify for state or utility rebates where available. Federal heat pump tax credits ended for systems installed after December 31, 2025, so no federal credit applies to a 2026 installation.
Heat pumps can work efficiently in Charleston because they move heat rather than generate it, and the area’s winters are relatively mild. In Climate Zone 9, systems are designed around a 24°F heating temperature and a 97°F cooling temperature. Proper sizing and installation help maintain comfort through cool spells and hot, humid summers.
Your energy costs depend on the heat pump, your home’s insulation and ducts, thermostat settings, and electricity use; South Carolina electricity currently costs 14.1¢ per kWh. Palmetto offers a Comfort Plan with $0 upfront and maintenance and repairs included for the plan’s life, or direct purchase, which may qualify for state or utility rebates where available.
In Charleston, leasing through Palmetto’s Comfort Plan may suit homeowners who prefer $0 upfront, predictable monthly payments, and maintenance, repairs, and warranty coverage for the plan’s life. Buying instead requires a one-time payment but gives you outright ownership. Choose based on your budget, desire for control, and comfort with future upkeep.
South Carolina electricity averages 14.1¢ per kWh, and Charleston’s Climate Zone 9 design temperatures—24°F for heating and 97°F for cooling—make proper heat-pump sizing important. A purchase may qualify for state or utility rebates when available; check current rules. No federal heat-pump tax credit applies to systems installed in 2026.
Heat pump installation costs in Charleston vary with home size, insulation, ductwork, and system capacity, so an assessment is needed for an accurate price. With direct purchase, you pay once and own the equipment outright. Ask for a home-specific quote rather than relying on a single citywide estimate.
Palmetto’s Comfort Plan has no upfront cost, with predictable monthly payments that include maintenance, repairs, and warranty coverage for the plan’s life. Charleston is Climate Zone 9, with design temperatures of 24°F for heating and 97°F for cooling; South Carolina electricity averages 14.1¢/kWh. No federal heat-pump tax credit applies to systems installed in 2026.
A heat pump can be financially worthwhile in Charleston, but savings depend on your current system, home insulation, and electricity use. South Carolina electricity averages 14.1¢ per kWh. In Climate Zone 9, where design temperatures are 24°F for heating and 97°F for cooling, a heat pump can provide year-round heating and cooling efficiently.
Compare installation costs and expected utility bills with keeping or replacing your existing equipment; available state or utility rebates may improve purchase economics. Palmetto’s Comfort Plan has no upfront cost and includes a predictable monthly payment, maintenance, repairs, and warranty coverage. Direct purchase means paying upfront and owning the system, with rebates potentially available.
Charleston homeowners can get a heat pump installed through Palmetto or by hiring a local HVAC contractor that installs heat pumps. Because Charleston is in Climate Zone 9, installers should size and configure the system for a 24°F design heating temperature and a 97°F design cooling temperature, rather than relying only on home size.
Palmetto offers two options: the Comfort Plan has $0 upfront cost, predictable monthly payments, and includes maintenance, repairs, and warranty coverage for the life of the plan. Direct purchase requires an upfront payment and gives you ownership; state or utility rebates may be available if active. South Carolina electricity costs 14.1¢ per kWh, which can help inform operating-cost comparisons.
HVAC stands for heating, ventilation, and air conditioning—the broad category of systems that manage indoor comfort. A heat pump is one type of HVAC equipment: it transfers heat rather than creating it by burning fuel, providing both heating and cooling in one system. In Charleston, it can be sized for design temperatures of 24°F for heating and 97°F for cooling.
A heat pump can replace a separate furnace and air conditioner by providing both heating and cooling; HVAC also includes ventilation. At South Carolina’s 14.1¢-per-kWh electricity price, operating costs depend on equipment efficiency, home condition, and use. Palmetto offers a $0-upfront Comfort Plan with predictable payments and covered maintenance and repairs, or direct purchase with possible state or utility rebates.