A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) is a heat pump (hybrid electric) water heater from A. O. Smith with a 46 gallon rated tank and a 66 gallon first-hour rating at a 3.45 UEF — 902 kWh/yr certified use, 63 in tall.
Our take
Fourteen catalog listings under 6 brand names trace back to this one certified unit — a mid-tier configuration of the slim 63-inch, 15-inch-diameter platform. It posts a 3.45 UEF, below the 3.55 class median, at about $153 a year (roughly $435 under a standard electric tank), with a median-matching 66-gallon first-hour rating for 3–4 people. Like its FPTU sibling the compressor stops at 45 °F ambient, handing off to resistance elements in cool spaces. 240 V / 22 A, R-134a, no smart features. Shop the six badges on price alone.
Best for: Narrow-space installs with the widest badge selection to price-shop.
Trade-off: Below-median UEF and an early 45 °F compressor cutoff.
Efficiency
Uniform Energy Factor (UEF)
3.45
Annual electricity use
902 kWh/yr
Recovery efficiency
407 %
General
Fuel
Electric
Capacity
First-hour rating
66 gal
Rated storage volume
46 gal
Draw pattern
Medium
Heat pump
Heat pump type
240 Volt Integrated HPWH
Refrigerant (GWP)
R-134a (GWP:1430)
Compressor low-temp cutoff
45 °F
Installation
Input voltage
240
Max current draw
22 A
Smart features
Smart / connected capable
No
Dimensions
Height
63 in
Diameter
15 in
Certification
ENERGY STAR certified
Yes
Who is the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) for?
Its 66 gallon first-hour rating suits a
household of 3–4 people under DOE sizing guidance.
Estimated running cost: about $153/year at the national
average electricity rate (902 kWh/yr certified use).
Needs a 240 V circuit; at 22 A max draw plan for a 30 A breaker (NEC 125% continuous-load rule).
The heat pump compressor operates down to 45 °F ambient — below that, backup
elements take over.
Also sold as
The A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) is certified hardware that A. O. Smith and its partner brands
publish under 14 names. The same specifications apply to every
variant:
Is the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) ENERGY STAR certified?
Yes, the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) holds a current ENERGY STAR certification for water heating efficiency (UEF 3.45).
How much does the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) cost to run per year?
About $153 per year at national average energy rates, based on its certified annual energy use under the DOE test draw pattern. Your rate and usage change this figure.
What electrical circuit does the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) need?
The A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) runs on a 240 V circuit drawing up to 22 A; per the NEC 125% continuous-load rule plan for at least a 30 A breaker (check the installation manual for the required circuit).
Is the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) a smart water heater?
No, the A. O. Smith Heat Pump 50-Gallon (HP1050H45DV 1) is not connected-capable — it has no app connectivity or demand-response support.
