WattCost

Data through April 2026

Running cost · Water Heaters (Electric) · ENERGY STAR certified

Smart Solar SSG2-ES 120

Heating a typical household's hot water, the Smart Solar SSG2-ES 120 is certified at 1,741 kWh a year — about $328 at the U.S. average electricity rate, or $27.32 a month. Even among certified models it's on the thirsty end: 61% more electricity than the median electric water heater, ranked 566 of 566. The same unit costs $215 a year in North Dakota but $812 in Hawaii — electricity rates, not the appliance, make the difference.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$328/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$27.32
Per day
90¢
Certified use
1,741 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
Split System HPWH
Storage volume
120 gal
First-hour rating
83 gal
UEF
2.85
643 kWh1,741 kWh
Where the Smart Solar SSG2-ES 120 (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Smart Solar SSG2-ES 120: 1,741 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$303
Alaska27.4¢$476
Arizona15.5¢$270
Arkansas14.2¢$247
California35.3¢$614
Colorado16.5¢$288
Connecticut32.2¢$561
Delaware18.8¢$327
District of Columbia25.4¢$442
Florida15.4¢$268
Georgia15.4¢$268
Hawaiipriciest46.6¢$812
Idaho12.7¢$221
Illinois20.5¢$356
Indiana17.9¢$312
Iowa13.9¢$241
Kansas15.8¢$275
Kentucky15.0¢$261
Louisiana14.4¢$251
Maine28.4¢$495
Maryland22.1¢$384
Massachusetts29.4¢$513
Michigan21.4¢$372
Minnesota16.4¢$285
Mississippi16.8¢$292
Missouri14.0¢$244
Montana13.9¢$242
Nebraska13.3¢$231
Nevada14.3¢$249
New Hampshire27.2¢$474
New Jersey23.5¢$410
New Mexico15.2¢$264
New York29.4¢$513
North Carolina16.3¢$283
North Dakotacheapest12.3¢$215
Ohio19.5¢$339
Oklahoma13.3¢$232
Oregon15.8¢$275
Pennsylvania21.5¢$374
Rhode Island28.3¢$493
South Carolina17.1¢$297
South Dakota14.5¢$253
Tennessee14.9¢$260
Texas17.0¢$296
Utah13.3¢$231
Vermont24.6¢$428
Virginia17.4¢$303
Washington14.4¢$250
West Virginia16.1¢$280
Wisconsin19.2¢$334
Wyoming14.7¢$256

Certified models closest in efficiency

electric water heaters within reach of 1,741 kWh/yr
ModelkWh/yr$/yr (US avg)
A. O. Smith HPTV-80 21,654$311
A. O. Smith HPV10-80H01DV 21,654$311
American HPV10280H009DV 21,654$311
Lochinvar HPV080KD 21,654$311
RELIANCE WATER HEATERS 10-80-DHPTV 21,654$311
State HPVX-80-DHPT 21,654$311

Run your own numbers

Your rate, your numbers

Per day
90¢
Per month
$27.32
Per year
$328

1,741 kWh/yr × 18.8¢/kWh = $328/yr

Prefilled with this model's certified 1,741 kWh/yr — adjust if your usage differs from the DOE test basis. 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.

Questions, answered with the data

How much electricity does the Smart Solar SSG2-ES 120 use?
ENERGY STAR certifies the Smart Solar SSG2-ES 120 at 1,741 kWh per year. 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.
How much does the Smart Solar SSG2-ES 120 cost to run per month?
About $27.32 a month at the U.S. average residential rate (18.8¢/kWh) — 90¢ a day, or $328 a year. Your state's rate moves this up or down; see the table above.
Is the Smart Solar SSG2-ES 120 energy efficient?
It uses 61% more electricity than the median certified electric water heater, which puts it among the least efficient certified models.
What does the Smart Solar SSG2-ES 120 cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $215 a year in North Dakota (12.3¢/kWh) and $812 in Hawaii (46.6¢/kWh).

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