Short answer (updated November 1, 2026)
ENERGY STAR lists 48 distinct integrated 50-gallon heat pump water heaters (rated 42 to 54 gallons; 185 listings including rebadged variants). The lowest rated energy use is the GE Profile PK50S10FNY01 at 773 kWh/yr, about $139/yr at U.S. average electricity prices. First-hour ratings range from 51 to 81 gallons. 5 of them are 120V plug-in models.
All 50-gallon models, ranked by rated energy use
Ranked by rated energy use, lowest first. Rated storage is usually a few gallons below the 50-gallon size on the box, and identical rebadged variants are grouped.
| Model | Type | Gallons | UEF | First-hour | kWh/yr | Est. $/yr | Min. air temp | Noise |
|---|---|---|---|---|---|---|---|---|
| GE Profile PK50S10FNY01 | 240V | 50 | 4.20 | 60 gal | 773 | $139 | 35°F | 41 dBA |
| A. O. Smith HPS10-50H45DV-2 + 5 variants incl. American, Lochinvar, RELIANCE WATER HEATERS | 240V | 46 | 3.80 | 65 gal | 831 | $150 | 37°F | — |
| A. O. Smith HPTS-50-2 | 240V | 46 | 3.80 | 65 gal | 831 | $150 | 37°F | 45 dBA |
| Bradford White RE2HP50-1NCTT | 240V | 45 | 3.89 | 65 gal | 835 | $151 | 37°F | 51 dBA |
| JETGLAS RE2HP50-1NCTT | 240V | 45 | 3.89 | 65 gal | 835 | $151 | 37°F | — |
| PHNIX KA06-50 | 240V | 44 | 3.88 | 65 gal | 837 | $151 | — | — |
| Richmond 10CE50-HP5S30 | 240V | 45 | 3.88 | 67 gal | 837 | $151 | 37°F | — |
| Navien NWP500S050AUMB | 240V | 44 | 3.85 | 65 gal | 840 | $152 | 41°F | 45 dBA |
| Rinnai REHP50C + 1 variant | 240V | 46 | 3.75 | 73 gal | 844 | $152 | 37.4°F | 49 dBA |
| Rheem HPLD50-1RH + 39 variants incl. Friedrich, Richmond, Ruud | 240V | 45 | 3.88 | 67 gal | 846 | $153 | 37°F | — |
| Rheem PROPH50 T2 RH400-30 | 240V | 45 | 3.88 | 67 gal | 846 | $153 | 37°F | 49 dBA |
| Rheem XE50T10H22U0 + 16 variants incl. Friedrich, Richmond, Ruud | 240V | 45 | 3.75 | 52 gal | 846 | $153 | 37°F | — |
| Ariston ARIHPWH-50-T + 2 variants incl. AMERICAN STANDARD WATER HEATERS, Lennox | 240V | 45 | 3.83 | 69 gal | 848 | $153 | 35°F | — |
| 1HVAC ACIQ-50G-HP-WH + 4 variants incl. ACIQ, DIYCOOL, PolarWave | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Alsetria HPWH-50G + 1 variant incl. ECO-AIR | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Bosch TR7000T - 50CA + 1 variant | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Custom Comfort CCOHPWH50A | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Eco-Logical ECO-50HPM1A | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Perfect aire 1PAWH50G + 1 variant incl. Gridless | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Kepler AZMCHW-50VN3A | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Midea MAWH50D2AKH + 3 variants | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Midea MAHW-50VN3A | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49.5 dBA |
| NOVAIR TCL-50GL-R134A | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| Senville SENWH-HP50 + 1 variant | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| stream33 S33-HPWH50 | 240V | 47 | 3.75 | 69 gal | 855 | $154 | 37.4°F | 49 dBA |
| LG R5TT20F-SA0 (208V) + 1 variant | 240V | 52 | 3.75 | 66 gal | 866 | $156 | 23°F | — |
| Ariston ARIHPWH-50 + 1 variant incl. AMERICAN STANDARD WATER HEATERS | 240V | 45 | 3.75 | 68 gal | 867 | $156 | 35°F | — |
| A. O. Smith HPA10-50H45DV-2 + 3 variants incl. Lochinvar, RELIANCE WATER HEATERS, State | 240V | 46 | 3.68 | 65 gal | 883 | $159 | 37°F | — |
| A. O. Smith HPTA-50-2 | 240V | 46 | 3.68 | 65 gal | 883 | $159 | 37°F | 49 dBA |
| American HPA10250H045DV-2 | 240V | 46 | 3.68 | 65 gal | 883 | $159 | 37°F | 45 dBA |
| A. O. Smith HPTU-50N-1 + 13 variants incl. American, Lochinvar, RELIANCE WATER HEATERS | 240V | 46 | 3.45 | 66 gal | 902 | $163 | 45°F | — |
| Rheem ECE H50 T2 RH310BM + 15 variants incl. Friedrich, Ruud | 240V | 45 | 3.50 | 67 gal | 915 | $165 | 37°F | — |
| Noritz NHP50 + 3 variants incl. Hubbell, VAUGHN THERMAL | 240V | 47 | 3.46 | 58 gal | 938 | $169 | 35°F | 54 dBA |
| Bradford White RE2H50S | 240V | 45 | 3.44 | 65 gal | 944 | $170 | 35°F | 51 dBA |
| JETGLAS RE2H50S | 240V | 45 | 3.44 | 65 gal | 944 | $170 | 35°F | — |
| A. O. Smith FPTU-50-1 + 4 variants incl. American, RELIANCE WATER HEATERS, State | 240V | 46 | 3.35 | 66 gal | 970 | $175 | 45°F | — |
| GE Profile PF50S10FPY01 (no longer made) + 1 variant | 120V plug-in | 50 | 3.20 | 59 gal | 1,015 | $183 | 35°F | 41 dBA |
| Rheem XE50T10HM00U0 + 9 variants incl. Friedrich, Richmond, Ruud | 120V plug-in | 46 | 3.00 | 55 gal | 1,072 | $193 | — | — |
| Rheem XE50T10H15U0 + 4 variants incl. Friedrich, Richmond, Ruud | 120V plug-in | 46 | 3.00 | 51 gal | 1,082 | $195 | — | — |
| Rheem PROPH50 T0 RH120 | 120V plug-in | 46 | 3.00 | 51 gal | 1,082 | $195 | — | 55 dBA |
| GE Profile PH50S10BNY01 | 240V | 50 | 4.50 | 75 gal | 1,102 | $199 | 35°F | 41 dBA |
| GE Profile PH50S10BPY01 (no longer made) | 240V | 50 | 4.30 | 77 gal | 1,154 | $208 | 35°F | 41 dBA |
| LG APHWC502D + 2 variants | 240V | 53 | 4.20 | 81 gal | 1,181 | $213 | 23°F | — |
| Ruud CPROPH50 T2 CD375-30 + 1 variant | 240V | 45 | 3.88 | 67 gal | 1,213 | $219 | 37°F | — |
| LG APHWC501D + 1 variant | 240V | 53 | 3.93 | 76 gal | 1,262 | $228 | 23°F | — |
| LG APHWC501M | 240V | 53 | 3.93 | 76 gal | 1,262 | $228 | 23°F | 42 dBA |
| Carnot Labs, Inc. N51 | 240V | 47 | 3.53 | 75 gal | 1,404 | $253 | 40°F | — |
| A. O. Smith HPTV-50-2 + 5 variants incl. American, Lochinvar, RELIANCE WATER HEATERS | 120V plug-in | 46 | 3.00 | 52 gal | 1,550 | $280 | 37°F | 45 dBA |
Est. $/yr at 18.04¢/kWh (EIA, 12-month avg. through Aug 2026). Your state's rate changes this; see your state guide.
Is this the right size?
A 50-gallon heat pump water heater typically suits 2 to 4 people. Heat pumps recover more slowly than gas or electric resistance tanks, so many installers size up one step. Use the first-hour rating to compare against your peak-hour demand.
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Common questions
What is the most efficient 50-gallon heat pump water heater?
By rated annual energy use in ENERGY STAR data, the GE Profile PK50S10FNY01 (773 kWh/yr, UEF 4.20).
How much does a 50-gallon heat pump water heater cost to run?
Rated models in this size use 773 to 1,550 kWh per year, or about $139 to $280 at the U.S. average rate.
Why is the rated volume smaller than the nominal size?
Manufacturers sell by nominal size, but DOE testing measures actual stored volume, which is usually a few gallons less.
What is the quietest 50-gallon model?
Among models that report a rated sound level, the GE Profile PK50S10FNY01 at 41 dBA.
Sources. ENERGY STAR certified heat pump water heater data (185 certified configurations, retrieved March 2026; each row links to a RatingPlate spec page when one is published). EIA residential electricity prices (EIA, 12-month avg. through Aug 2026). Methodology