Little Home Appliance

200 45 gal Electric Water Heaters, Ranked by Running Cost

Electric water heaters (including heat pump models), 45 gal class (41.1-52.0 gal), sold in the US. Ranked cheapest to run first, estimated at 18.31¢/kWh (July 2026).

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All models here are heat pump water heaters — ENERGY STAR does not appear to certify standard electric-resistance tanks, only the far more efficient heat pump type. "Split system," "120V integrated" and "240V integrated" below are different installation types, not efficiency tiers.

200 ENERGY STAR certified models, from about $125 to $284 a year in electricity to run at the US average rate. See how we calculate running costs.

Top 5 cheapest to run

#1 Split system

Eco-Logical OMNI-50HP1-1A

46 gal · 681 kWh/yr

Est. $125/year to run

#2 Split system

Eco-Logical OMNI-50HP2-1A

46 gal · 769 kWh/yr

Est. $141/year to run

#3 240V integrated

Reliance Water Heaters 10-50-DHPTS 2**

46 gal · 831 kWh/yr

Est. $152/year to run

#4 240V integrated

Lochinvar HPSA050KD 2**

46 gal · 831 kWh/yr

Est. $152/year to run

#5 240V integrated

A. O. Smith HPS10-50H45DV 2**

46 gal · 831 kWh/yr

Est. $152/year to run

All 200 models

Rank Brand Model Install type Capacity Energy use Est. cost/year
1 Eco-Logical OMNI-50HP1-1A Split system 46 gal 681 kWh/yr $125
2 Eco-Logical OMNI-50HP2-1A Split system 46 gal 769 kWh/yr $141
3 Reliance Water Heaters 10-50-DHPTS 2** 240V integrated 46 gal 831 kWh/yr $152
4 Lochinvar HPSA050KD 2** 240V integrated 46 gal 831 kWh/yr $152
5 A. O. Smith HPS10-50H45DV 2** 240V integrated 46 gal 831 kWh/yr $152
6 State HPSX-50-DHPT 2** 240V integrated 46 gal 831 kWh/yr $152
7 American HPS10250H045DV 2** 240V integrated 46 gal 831 kWh/yr $152
8 A. O. Smith HPTS-50 2** 240V integrated 46 gal 831 kWh/yr $152
9 A. O. Smith HPSN10-50H45DV 2** 240V integrated 46 gal 831 kWh/yr $152
10 Jetglas RE2HP50*-1NCTT 240V integrated 45 gal 835 kWh/yr $153
11 Bradford White RE2HP50**-1NCTT 240V integrated 45 gal 835 kWh/yr $153
12 Phnix KA06-50 240V integrated 44.5 gal 837 kWh/yr $153
13 Arctic Arctic-HP-Hot Water-KA06-50 240V integrated 44.5 gal 837 kWh/yr $153
14 Navien NWP500S050AUMB 240V integrated 44 gal 840 kWh/yr $154
15 Rinnai REHP50BM 240V integrated 46 gal 844 kWh/yr $155
16 Rinnai REHP50 240V integrated 46 gal 844 kWh/yr $155
17 Rinnai REHP50C 240V integrated 46 gal 844 kWh/yr $155
18 Richmond 10E50-HP515 240V integrated 45 gal 846 kWh/yr $155
19 Ruud PROUH50 T2 RU375-15 240V integrated 45 gal 846 kWh/yr $155
20 Rheem XE50T10H22U0 240V integrated 45 gal 846 kWh/yr $155
21 Rheem PROPH50 T2 RH375-15 240V integrated 45 gal 846 kWh/yr $155
22 Richmond 10E50-HP530 240V integrated 45 gal 846 kWh/yr $155
23 Ruud PROUH50 T2 RU375-30 240V integrated 45 gal 846 kWh/yr $155
24 Ruud PROUH50 T2 RU375-SO 240V integrated 45 gal 846 kWh/yr $155
25 Rheem PROPH50 T2 RH375-30 240V integrated 45 gal 846 kWh/yr $155
26 Rheem XE50T10HS45U0 240V integrated 45 gal 846 kWh/yr $155
27 Richmond 10E50-HP5U15 240V integrated 45 gal 846 kWh/yr $155
28 Rheem PROPH50 T2 RH400-15 240V integrated 45 gal 846 kWh/yr $155
29 Ruud PROUH50 T2 RU400-15 240V integrated 45 gal 846 kWh/yr $155
30 Rheem XE50T10H22U1 240V integrated 45 gal 846 kWh/yr $155
31 Richmond 10E50-HP5U30 240V integrated 45 gal 846 kWh/yr $155
32 Richmond 10E50-HP5US30 240V integrated 45 gal 846 kWh/yr $155
33 Rheem PROPH50 T2 RH400-30 240V integrated 45 gal 846 kWh/yr $155
34 Rheem PROPH50 T2 RH400-SO 240V integrated 45 gal 846 kWh/yr $155
35 Ruud PROUH50 T2 RU400-30 240V integrated 45 gal 846 kWh/yr $155
36 Ruud PROUH50 T2 RU400-SO 240V integrated 45 gal 846 kWh/yr $155
37 Rheem XE50T10H45U1 240V integrated 45 gal 846 kWh/yr $155
38 Rheem XE50T10HS45U1 240V integrated 45 gal 846 kWh/yr $155
39 Friedrich PROH50 T2 FD400-15 240V integrated 45 gal 846 kWh/yr $155
40 Friedrich PROH50 T2 FD400-SO 240V integrated 45 gal 846 kWh/yr $155
41 Friedrich PROH50 T2 FD400-30 240V integrated 45 gal 846 kWh/yr $155
42 Ruud PROUH50 T2 RU400-Z30 240V integrated 45 gal 846 kWh/yr $155
43 Richmond 10E50-HP5UZ30 240V integrated 45 gal 846 kWh/yr $155
44 Rheem PROPH50 T2 RH400-Z30 240V integrated 45 gal 846 kWh/yr $155
45 Rheem XE50T10HZ45U1 240V integrated 45 gal 846 kWh/yr $155
46 Friedrich PROH50 T2 FD400-Z30 240V integrated 45 gal 846 kWh/yr $155
47 Ariston ARIHPWH-50-T 240V integrated 45 gal 848 kWh/yr $155
48 Lennox WHHP050T45MD240S**** 240V integrated 45 gal 848 kWh/yr $155
49 Midea US3-RSJ-15/190RDVN3-L3 240V integrated 47 gal 855 kWh/yr $157
50 Midea MAHW-50VN3A 240V integrated 47 gal 855 kWh/yr $157
51 Midea CAN3-RSJ-15/190RDVN3-L3 240V integrated 47 gal 855 kWh/yr $157
52 Midea MCHW-50VN3A 240V integrated 47 gal 855 kWh/yr $157
53 Diycool ACIQ-50G-HP-WH 240V integrated 47 gal 855 kWh/yr $157
54 1HVAC ACIQ-50G-HP-WH 240V integrated 47 gal 855 kWh/yr $157
55 PolarWave ACIQ-50G-HP-WH 240V integrated 47 gal 855 kWh/yr $157
56 Stealth ACIQ-50G-HP-WH 240V integrated 47 gal 855 kWh/yr $157
57 ACIQ ACIQ-50G-HP-WH 240V integrated 47 gal 855 kWh/yr $157
58 Bosch TR7000T - 50US 240V integrated 47 gal 855 kWh/yr $157
59 Kepler AZMCHW-50VN3A 240V integrated 47 gal 855 kWh/yr $157
60 Stream33 S33-HPWH50 240V integrated 47 gal 855 kWh/yr $157
61 Midea MAWH50D2AKH 240V integrated 47 gal 855 kWh/yr $157
62 Eco-Logical ECO-50HPM1A 240V integrated 47 gal 855 kWh/yr $157
63 Alsetria HPWH-50G 240V integrated 47 gal 855 kWh/yr $157
64 Eco-air HPWH-50G 240V integrated 47 gal 855 kWh/yr $157
65 Gridless AYHW50G 240V integrated 47 gal 855 kWh/yr $157
66 Custom Comfort CCOHPWH50A 240V integrated 47 gal 855 kWh/yr $157
67 Novair TCL-50GL-R134A 240V integrated 47 gal 855 kWh/yr $157
68 Senville SENWH-HP50 240V integrated 47 gal 855 kWh/yr $157
69 Perfect Aire 1PAWH50G 240V integrated 47 gal 855 kWh/yr $157
70 Senville SENWH-HP50US 240V integrated 47 gal 855 kWh/yr $157
71 Midea US3-RSJ-15/190RDVN3-L4 240V integrated 46 gal 861 kWh/yr $158
72 Midea CAN3-RSJ-15/190RDVN3-L4 240V integrated 46 gal 861 kWh/yr $158
73 Rinnai REHP50CW 240V integrated 46 gal 861 kWh/yr $158
74 Rinnai REHP50W 240V integrated 46 gal 861 kWh/yr $158
75 Midea MCHW-50VN3B 240V integrated 46 gal 861 kWh/yr $158
76 Midea MAHW-50VN3B 240V integrated 46 gal 861 kWh/yr $158
77 American Standard Water Heaters ASHPWH-50***** 240V integrated 45 gal 867 kWh/yr $159
78 Ariston ARIHPWH-50 240V integrated 45 gal 867 kWh/yr $159
79 Sanco2 GS5-45HPC HP + ECO-43SSAQB Split system 43 gal 868 kWh/yr $159
80 Sanco2 GS5-45HPC-D HP + ECO-43SSAQB Split system 43 gal 868 kWh/yr $159
81 A. O. Smith HPTA-50 2** 240V integrated 46 gal 883 kWh/yr $162
82 State HPAX-50-DHPT 2** 240V integrated 46 gal 883 kWh/yr $162
83 Lochinvar HPPA050KD 2** 240V integrated 46 gal 883 kWh/yr $162
84 American HPA10250H045DV 2** 240V integrated 46 gal 883 kWh/yr $162
85 Reliance Water Heaters 10-50-DHPTA 2** 240V integrated 46 gal 883 kWh/yr $162
86 A. O. Smith HPA10-50H45DV 2** 240V integrated 46 gal 883 kWh/yr $162
87 A. O. Smith CAHP-50 2** 240V integrated 46 gal 883 kWh/yr $162
88 Lochinvar CHPA-50 2** 240V integrated 46 gal 883 kWh/yr $162
89 State CSHP-50 2** 240V integrated 46 gal 883 kWh/yr $162
90 A. O. Smith HP1050H45DVCTA-1** 240V integrated 46 gal 902 kWh/yr $165
91 U.S. Craftmaster HPHE2K50HD045VUN 1** 240V integrated 46 gal 902 kWh/yr $165
92 State HPX-50-DHPTCTA 1** 240V integrated 46 gal 902 kWh/yr $165
93 American HPHE10250H045DVCTA-1** 240V integrated 46 gal 902 kWh/yr $165
94 A. O. Smith HPTU-50CTA 1** 240V integrated 46 gal 902 kWh/yr $165
95 A. O. Smith HP1050H45DV 1** 240V integrated 46 gal 902 kWh/yr $165
96 American HPHE10250H045DVDR 1** 240V integrated 46 gal 902 kWh/yr $165
97 Lochinvar HPA052KD 1** 240V integrated 46 gal 902 kWh/yr $165
98 Reliance Water Heaters 10-50-DHPHTCTA 1** 240V integrated 46 gal 902 kWh/yr $165
99 State HPX-50-DHPTNE 1** 240V integrated 46 gal 902 kWh/yr $165
100 A. O. Smith HPTU-50DR 1** 240V integrated 46 gal 902 kWh/yr $165
101 American HPHE10250H045DVN 1** 240V integrated 46 gal 902 kWh/yr $165
102 Reliance Water Heaters 10-50-DHPHTNE 1** 240V integrated 46 gal 902 kWh/yr $165
103 A. O. Smith HPTU-50N 1** 240V integrated 46 gal 902 kWh/yr $165
104 Rheem PRO H50 T2 RH310BM 240V integrated 45 gal 915 kWh/yr $168
105 Rheem PRO H50 T2 RH310UM 240V integrated 45 gal 915 kWh/yr $168
106 Ruud PRO H50 T2 RU310BM 240V integrated 45 gal 915 kWh/yr $168
107 Ruud PRO H50 T2 RU310UM 240V integrated 45 gal 915 kWh/yr $168
108 Friedrich PROH50 T2 FD310UM 240V integrated 45 gal 915 kWh/yr $168
109 Friedrich PROH50 T2 FD310BM 240V integrated 45 gal 915 kWh/yr $168
110 Friedrich PROH50 T2 FD350BM 240V integrated 45 gal 915 kWh/yr $168
111 Ruud PROUH50 T2 RU350BM 240V integrated 45 gal 915 kWh/yr $168
112 Rheem PROUH50 T2 RH350BM 240V integrated 45 gal 915 kWh/yr $168
113 Friedrich PROH50 T2 FD350UM 240V integrated 45 gal 915 kWh/yr $168
114 Ruud PROUH50 T2 RU350UM 240V integrated 45 gal 915 kWh/yr $168
115 Rheem PROUH50 T2 RH350UM 240V integrated 45 gal 915 kWh/yr $168
116 Gsw Water Heaters GHPCO-45 1**+GXST-50LBTTP 1** Split system 48 gal 915 kWh/yr $168
117 Lochinvar LHPCO-45 1**+LXST-50LBTTP 1** Split system 48 gal 915 kWh/yr $168
118 American MHPCO-45 1**+MXST-50LBTTP 1** Split system 48 gal 915 kWh/yr $168
119 Reliance Water Heaters RHPCO-45 1**+RXST-50LBG 1** Split system 48 gal 915 kWh/yr $168
120 State SHPCO-45 1**+SXST-50LBG 1** Split system 48 gal 915 kWh/yr $168
121 A. O. Smith HPACO-45 1**+AXST-50LBTTP 1** Split system 48 gal 915 kWh/yr $168
122 Giant GTHPCO-45 1**+GTXST-50LBTTP 1* Split system 48 gal 915 kWh/yr $168
123 John Wood JWHPCO-45 1**+JWXST-50LBTTP 1* Split system 48 gal 915 kWh/yr $168
124 A. O. Smith HPACO-45C 1**+AXST-50LBCTTP 1* Split system 48 gal 915 kWh/yr $168
125 John Wood JWHPCO-45 1**+JWXST-50TTTP 1** Split system 45 gal 923 kWh/yr $169
126 A. O. Smith HPACO-45C 1**+AXST-50TCTTP 1** Split system 45 gal 923 kWh/yr $169
127 John Wood JWHPCO-45 1**+JWXST-50T 1** Split system 45 gal 923 kWh/yr $169
128 A. O. Smith HPACO-45C 1**+AXST-50TC 1** Split system 45 gal 923 kWh/yr $169
129 Giant GTHPCO-45 1**+GTXST-50TTTP 1** Split system 46 gal 923 kWh/yr $169
130 Gsw Water Heaters GHPCO-45 1**+GXST-50TTTP 1** Split system 46 gal 923 kWh/yr $169
131 John Wood JWHPCO-45 1**+JWXST-50STTP 1** Split system 46 gal 923 kWh/yr $169
132 A. O. Smith HPACO-45C 1**+AXST-50SCTTP 1** Split system 46 gal 923 kWh/yr $169
133 Giant GTHPCO-45 1**+GTXST-50T 1** Split system 46 gal 923 kWh/yr $169
134 Gsw Water Heaters GHPCO-45 1**+GXST-50T 1** Split system 46 gal 923 kWh/yr $169
135 A. O. Smith HPACO-45C 1**+AXST-50SC 1** Split system 46 gal 923 kWh/yr $169
136 Lochinvar LHPCO-45 1**+LXST-50TTTP 1** Split system 45 gal 923 kWh/yr $169
137 American MHPCO-45 1**+MXST-50TTTP 1** Split system 45 gal 923 kWh/yr $169
138 State SHPCO-45 1**+SXST-50TG 1** Split system 45 gal 923 kWh/yr $169
139 A. O. Smith HPACO-45 1**+AXST-50TTTP 1** Split system 45 gal 923 kWh/yr $169
140 Lochinvar LHPCO-45 1**+LXST-50T 1** Split system 45 gal 923 kWh/yr $169
141 American MHPCO-45 1**+MXST-50T 1** Split system 45 gal 923 kWh/yr $169
142 Reliance Water Heaters RHPCO-45 1**+RXST-50T 1** Split system 45 gal 923 kWh/yr $169
143 State SHPCO-45 1**+SXST-50T 1** Split system 45 gal 923 kWh/yr $169
144 Lochinvar LHPCO-45 1**+LXST-50STTP 1** Split system 46 gal 923 kWh/yr $169
145 American MHPCO-45 1**+MXST-50STTP 1** Split system 46 gal 923 kWh/yr $169
146 Reliance Water Heaters RHPCO-45 1**+RXST-50SG 1** Split system 46 gal 923 kWh/yr $169
147 State SHPCO-45 1**+SXST-50SG 1** Split system 46 gal 923 kWh/yr $169
148 A. O. Smith HPACO-45 1**+AXST-50STTP 1** Split system 46 gal 923 kWh/yr $169
149 Lochinvar LHPCO-45 1**+LXST-50S 1** Split system 46 gal 923 kWh/yr $169
150 American MHPCO-45 1**+MXST-50S 1** Split system 46 gal 923 kWh/yr $169
151 Reliance Water Heaters RHPCO-45 1**+RXST-50S 1** Split system 46 gal 923 kWh/yr $169
152 State SHPCO-45 1**+SXST-50S 1** Split system 46 gal 923 kWh/yr $169
153 A. O. Smith HPACO-45 1**+AXST-50T 1** Split system 45 gal 923 kWh/yr $169
154 A. O. Smith HPACO-45 1**+AXST-50S 1** Split system 46 gal 923 kWh/yr $169
155 Gsw Water Heaters GHPCO-45 1**+GXST-50STTP 1** Split system 46 gal 923 kWh/yr $169
156 Gsw Water Heaters GHPCO-45 1**+GXST-50S 1** Split system 46 gal 923 kWh/yr $169
157 Giant GTHPCO-45 1**+GTXST-50STTP 1** Split system 46 gal 923 kWh/yr $169
158 Giant GTHPCO-45 1**+GTXST-50S 1** Split system 46 gal 923 kWh/yr $169
159 Reliance Water Heaters RHPCO-45 1**+RXST-50TG 1** Split system 45 gal 923 kWh/yr $169
160 Gsw Water Heaters GHPCO-45 1**+GXST-50STTP 1* Split system 46 gal 923 kWh/yr $169
161 Gsw Water Heaters GHPCO-45 1**+GXST-50S 1* Split system 46 gal 923 kWh/yr $169
162 Giant GTHPCO-45 1**+GTXST-50STTP 1* Split system 46 gal 923 kWh/yr $169
163 Giant GTHPCO-45 1**+GTXST-50S 1* Split system 46 gal 923 kWh/yr $169
164 Vaughn Thermal ME50HPT 240V integrated 47 gal 938 kWh/yr $172
165 Hubbell ME50HPT 240V integrated 47 gal 938 kWh/yr $172
166 Vaughn Thermal ME50HPT-CN 240V integrated 47 gal 938 kWh/yr $172
167 Noritz NHP50 240V integrated 47 gal 938 kWh/yr $172
168 Bradford White RE2H50S*-***** 240V integrated 45 gal 944 kWh/yr $173
169 Jetglas RE2H50S*-***** 240V integrated 45 gal 944 kWh/yr $173
170 Reliance Water Heaters 6-50-DHPHT 1** 240V integrated 46 gal 970 kWh/yr $178
171 U.S. Craftmaster HPHE2F50HD045VU 1** 240V integrated 46 gal 970 kWh/yr $178
172 A. O. Smith FPTU-50 1** 240V integrated 46 gal 970 kWh/yr $178
173 State HP6-50-DHPT 1** 240V integrated 46 gal 970 kWh/yr $178
174 American HPHE6250H045DV 1** 240V integrated 46 gal 970 kWh/yr $178
175 GE PF50S10FPY01 120V integrated 50 gal 1015 kWh/yr $186
176 Rheem PROPH50 T0 RH120-M 120V integrated 46 gal 1072 kWh/yr $196
177 Rheem PROPH50 T0 RH120-MSO 120V integrated 46 gal 1072 kWh/yr $196
178 Rheem XE50T10HM00U0 120V integrated 46 gal 1072 kWh/yr $196
179 Rheem XE50T10HMS00U0 120V integrated 46 gal 1072 kWh/yr $196
180 Ruud PROUH50 T0 RU120-MSO 120V integrated 46 gal 1072 kWh/yr $196
181 Ruud PROUH50 T0 RU120-M 120V integrated 46 gal 1072 kWh/yr $196
182 Richmond 10E50-HP120M 120V integrated 46 gal 1072 kWh/yr $196
183 Richmond 10E50-HP120MS 120V integrated 46 gal 1072 kWh/yr $196
184 Friedrich PROH50 T0 FD120-M 120V integrated 46 gal 1072 kWh/yr $196
185 Friedrich PROH50 T0 FD120-MSO 120V integrated 46 gal 1072 kWh/yr $196
186 Richmond 10E50-HP120 120V integrated 46 gal 1082 kWh/yr $198
187 Rheem PROPH50 T0 RH120 120V integrated 46 gal 1082 kWh/yr $198
188 Ruud PROUH50 T0 RU120 120V integrated 46 gal 1082 kWh/yr $198
189 Rheem XE50T10H15U0 120V integrated 46 gal 1082 kWh/yr $198
190 Friedrich PROH50 T0 FD120 120V integrated 46 gal 1082 kWh/yr $198
191 Rheem XE50T10HD00U0 120V integrated 46 gal 1082 kWh/yr $198
192 GE PH50S10BNY01 240V integrated 50 gal 1102 kWh/yr $202
193 GE PH50S10BPY01 240V integrated 50 gal 1154 kWh/yr $211
194 Carnot Labs, Inc. N51 240V integrated 47 gal 1404 kWh/yr $257
195 Reliance Water Heaters 10-50-DHPTV 2** 120V integrated 46 gal 1550 kWh/yr $284
196 Lochinvar HPV050KD 2** 120V integrated 46 gal 1550 kWh/yr $284
197 American HPV10250H009DV 2** 120V integrated 46 gal 1550 kWh/yr $284
198 State HPVX-50-DHPT 2** 120V integrated 46 gal 1550 kWh/yr $284
199 A. O. Smith HPV10-50H01DV 2** 120V integrated 46 gal 1550 kWh/yr $284
200 A. O. Smith HPTV-50 2** 120V integrated 46 gal 1550 kWh/yr $284

Estimated running cost = annual kWh × 18.31¢/kWh (July 2026 US average). Your own rate may be higher or lower — check your bill. ENERGY STAR figures are lab-test results; real-world use varies. Gas and propane water heaters are not included — their energy figures cover electronics only, not the fuel that heats the water. This list includes discontinued and not-yet-sold certified models.