The Most Efficient Electric Water Heaters

Certified electric water heaters ranked by lowest annual electricity use — heat-pump units lead by a wide margin.

The spread inside this top 20: 681–831 kWh/yr, or $125–$152 a year at the U.S. average rate. Ties are ordered alphabetically.

The Most Efficient Electric Water Heaters — certified annual kWh, priced at the US average rate
#	Model	Type	kWh/yr	$/yr (US avg)
1	Eco-Logical OMNI-50HP1-1A	—	681	$125
2	GE Profile PF40S10FPY01	—	724	$133
3	Eco-Logical OMNI-50HP2-1A	—	769	$141
4	GE Profile PH40S10BPY01	—	773	$142
5	Friedrich PROH40 T0 FD120-M	—	780	$143
6	Friedrich PROH40 T0 FD120-MSO	—	780	$143
7	Rheem PROPH40 T0 RH120-M	—	780	$143
8	Rheem PROPH40 T0 RH120-MSO	—	780	$143
9	Rheem XE40T10HM00U0	—	780	$143
10	Rheem XE40T10HMS00U0	—	780	$143
11	Richmond 10E40-HP120M	—	780	$143
12	Richmond 10E40-HP120MS	—	780	$143
13	Ruud PROUH40 T0 RU120-M	—	780	$143
14	Ruud PROUH40 T0 RU120-MSO	—	780	$143
15	A. O. Smith HPS10-50H45DV 2	—	831	$152
16	A. O. Smith HPSN10-50H45DV 2	—	831	$152
17	A. O. Smith HPTS-50 2	—	831	$152
18	American HPS10250H045DV 2	—	831	$152
19	Lochinvar HPSA050KD 2	—	831	$152
20	RELIANCE WATER HEATERS 10-50-DHPTS 2	—	831	$152

How this list is built: every entry comes straight from the ENERGY STAR certified-product dataset for water heaters (electric) (510 models), ordered by certified annual kWh. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.

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