Heat Pump Water Heater Calculator in Delaware
See whether a heat pump water heater is worth it in Delaware. Compares operating costs against electric, gas ($1.35/therm), or propane using local rates ($0.152/kWh).
Data last updated July 2026. Sources & methodology
What Delaware Residents Should Know
Electricity in Delaware averages $0.152 per kWh — near the national average. For a typical three-person household, heating water with a standard electric resistance tank costs roughly $464 per year, while a heat pump water heater doing the same job draws about a third of the electricity, costing around $122. That gap, roughly $342 every year, is what pays off the higher upfront price.
Against natural gas the math is closer but still favorable in Delaware: at $1.35 per therm, a standard gas tank costs roughly $209 per year for the same household, versus about $122 for a heat pump water heater. Whether the difference justifies switching depends on installation cost and how long you plan to stay — run the calculator above with your actual numbers.
One practical note for Delaware homeowners: heat pump water heaters need roughly 700–1,000 cubic feet of surrounding air and run best in a garage, basement, or utility room that stays above about 40°F, since they pull heat from the air around them. With a typical 10–15 year lifespan, the annual savings above usually repay the higher purchase price well within the unit's service life.
With the federal 25C credit having ended December 31, 2025, state and utility programs are now the main incentives — Delaware residents can access up to $12,500 through state heat pump programs, and many utilities offer their own water heater rebates of $300–$1,500. Heat pump water heaters typically install for $2,500–$4,000, so these rebates meaningfully shorten the payback period.
Avg. Electricity Rate
$0.152/kWh
Avg. monthly bill: $132
Regular Gas Price
$3.15/gal
Natural gas: $1.35/therm
Incentives in Delaware
Federal clean energy tax credits ended in late 2025 under legislation passed in July 2025; they are shown below for reference since recent purchasers may still claim them. State programs are governed separately and many remain active — always verify current details with the program before purchasing.
| Incentive | Type | Amount | Description |
|---|---|---|---|
| Energy Efficient Home Improvement Credit (Heat Pump - 25C)Ended | tax credit | 30% | Federal tax credit of 30% up to $2,000 for qualifying heat pumps. Ended December 31, 2025 — systems placed in service after that date do not qualify. State and utility heat pump rebates remain available in many states. |
| Delaware Green Energy Program Geothermal Grant | grant | $10,000 | DNREC grant of $900 per ton for a residential geothermal (ground-source) heat pump, capped at $10,000, for Delmarva Power customers. |
| Energize Delaware Heat Pump Rebate | rebate | $1,400 | Rebate of up to $1,400 for a qualifying high-efficiency air-source heat pump under Home Performance with ENERGY STAR. |
| Energize Delaware Heat Pump Water Heater Rebate | rebate | $1,100 | Rebate of up to $1,100 for a qualifying heat-pump water heater under Home Performance with ENERGY STAR. |
Heat Pump Water Heater in Delaware: Frequently Asked Questions
- Is a heat pump water heater worth it in Delaware?
- For a typical household in Delaware, a heat pump water heater uses about a third of the electricity of a standard electric tank — roughly $122 a year versus $464 — saving about $342 annually, which is what pays back the higher purchase price.
- How much does a heat pump water heater cost to run in Delaware?
- At Delaware's $0.152/kWh rate, a heat pump water heater costs roughly $122 per year to run for a three-person household.
- Are there rebates for heat pump water heaters in Delaware?
- Yes. Delaware programs including Delaware Green Energy Program Geothermal Grant, Energize Delaware Heat Pump Rebate, and Energize Delaware Heat Pump Water Heater Rebate can help, and many utilities add water-heater rebates of $300–$1,500. The federal 25C credit ended December 31, 2025.
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