Heat Pump Water Heater Incentives
$1,050 Instant Discount
Tens of thousands of Mainers own heat pump water heaters. They’re popular because they produce lots of hot water, help dehumidify, and can save more than $500 per year in electricity.* Click here to learn more about this technology, including installation considerations.
Efficiency Maine offers five ways to get the best pricing in Maine:
- Home Depot – $499 after $1,050 instant discount**
- Granite Group – $549 after $1,050 instant discount
- Lowe’s – $549 after $1,050 instant discount**
- Plumbers can get discounted units from participating distributors.
- Heat pump water heaters purchased without an instant discount qualify for an $1,050 mail-in rebate.
*Compared to a traditional electric water heater as shown on Efficiency Maine’s Compare Water Heating Costs calculator as of 6/23/2025. Your results may differ.
**Prices of 50-gallon heat pump water heaters as of 6/4/2025. To get an instant discount at Lowe’s or Home Depot, scan in-store QR code or follow the link listed on the in-store displays.
Eligibility
- If using mail-in rebate form, it must be emailed or postmarked within six months of purchase and a copy of receipt/invoice from retailer or wholesaler (not installer) showing purchase date, price, and model number must be attached.
- New and installed in Maine
- ENERGY STAR® certified of any tank size
- Unit does not need to be installed by a Residential Registered Vendor.
- W-9 needed if mail-in rebate is for a business
Terms and Conditions
Instant discounts cannot be combined with mail-in rebates. One heat pump water heater rebate or instant discount per installation address per calendar year. Incentive not to exceed purchase price. Instant discount only valid at participating distributors and retailers. Efficiency Maine does not guarantee product performance. Program is subject to change or termination without notice. Incomplete information may delay or disqualify your rebate.