Smart Solar SSG2-ES 120
ENERGY STAR certified
Heat pump water heater · 120 gallons
Inthis water heater costs
about $26 a month
$314 a year
An estimate at your state's average rate — not a guarantee of your bill.
The yellow sticker says $244 a year.
You'll pay $70 more.
Sticker uses 14¢ per kWh. The U.S. average is 18.0¢ per kWh.
Energy use
1,741 kWh a year
vs similar heat pump water heater
+55%
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Cheaper to run, same size
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A year at the U.S. average residential rate.
Cost in every state
1,741 kWh a year × each state's average residential rate (EIA 12-month average through July 2026).
| State | Rate | Per year | Per month |
|---|---|---|---|
| Hawaii | 43.7¢ | $761 | about $63 a month |
| California | 33.1¢ | $577 | about $48 a month |
| Massachusetts | 30.4¢ | $529 | about $44 a month |
| Rhode Island | 29.4¢ | $512 | about $43 a month |
| Maine | 29.3¢ | $510 | about $42 a month |
| New York | 28.4¢ | $494 | about $41 a month |
| Connecticut | 28.2¢ | $491 | about $41 a month |
| Alaska | 27.0¢ | $470 | about $39 a month |
| New Hampshire | 26.8¢ | $466 | about $39 a month |
| District of Columbia | 24.2¢ | $421 | about $35 a month |
Show all 52 statesShow fewer
| Vermont | 23.9¢ | $416 | about $35 a month |
|---|---|---|---|
| New Jersey | 23.6¢ | $411 | about $34 a month |
| Maryland | 22.3¢ | $388 | about $32 a month |
| Michigan | 21.0¢ | $366 | about $30 a month |
| Pennsylvania | 20.8¢ | $361 | about $30 a month |
| Illinois | 19.0¢ | $330 | about $28 a month |
| Wisconsin | 18.8¢ | $327 | about $27 a month |
| Ohio | 18.3¢ | $319 | about $27 a month |
| U.S. average | 18.0¢ | $314 | about $26 a month |
| Delaware | 18.0¢ | $313 | about $26 a month |
| Indiana | 17.1¢ | $297 | about $25 a month |
| Virginia | 16.6¢ | $288 | about $24 a month |
| Colorado | 16.6¢ | $288 | about $24 a month |
| Alabama | 16.5¢ | $287 | about $24 a month |
| Minnesota | 16.2¢ | $283 | about $24 a month |
| Texas | 16.0¢ | $279 | about $23 a month |
| South Carolina | 15.7¢ | $274 | about $23 a month |
| West Virginia | 15.7¢ | $273 | about $23 a month |
| Oregon | 15.6¢ | $271 | about $23 a month |
| Arizona | 15.5¢ | $269 | about $22 a month |
| Florida | 15.4¢ | $268 | about $22 a month |
| New Mexico | 15.2¢ | $265 | about $22 a month |
| Kansas | 15.1¢ | $263 | about $22 a month |
| Georgia | 15.1¢ | $262 | about $22 a month |
| Mississippi | 14.9¢ | $260 | about $22 a month |
| North Carolina | 14.9¢ | $259 | about $22 a month |
| South Dakota | 14.3¢ | $248 | about $21 a month |
| Washington | 14.2¢ | $247 | about $21 a month |
| Wyoming | 14.2¢ | $246 | about $21 a month |
| Iowa | 14.1¢ | $245 | about $20 a month |
| Kentucky | 14.0¢ | $244 | about $20 a month |
| Montana | 13.9¢ | $243 | about $20 a month |
| Missouri | 13.9¢ | $242 | about $20 a month |
| Tennessee | 13.7¢ | $238 | about $20 a month |
| Oklahoma | 13.6¢ | $237 | about $20 a month |
| Nevada | 13.6¢ | $236 | about $20 a month |
| Arkansas | 13.5¢ | $234 | about $20 a month |
| Utah | 13.3¢ | $232 | about $19 a month |
| Louisiana | 13.1¢ | $228 | about $19 a month |
| Nebraska | 12.9¢ | $225 | about $19 a month |
| Idaho | 12.7¢ | $221 | about $18 a month |
| North Dakota | 12.5¢ | $218 | about $18 a month |
What the Smart Solar SSG2-ES 120 costs where electricity is expensive
At Hawaii's average residential rate of 43.7¢ per kWh, the Smart Solar SSG2-ES 120 costs $761 a year — $517 more a year than the label says. The EnergyGuide label estimates $244 a year, because every label in the country is calculated at 14¢ per kWh. At the U.S. average of 18.0¢ per kWh this water heater costs $314 a year, and in North Dakota, the cheapest state, $218 a year.
| Where | Rate | Cost a year | vs the label |
|---|---|---|---|
| Hawaii | 43.7¢ per kWh | $761 | +$517 |
| California | 33.1¢ per kWh | $577 | +$333 |
| Massachusetts | 30.4¢ per kWh | $529 | +$285 |
| Rhode Island | 29.4¢ per kWh | $512 | +$268 |
| Maine | 29.3¢ per kWh | $510 | +$266 |
| North Dakota | 12.5¢ per kWh | $218 | −$26 |
Electricity prices: EIA 12-month average through July 2026, residential sector, average revenue per kWh. Label figure calculated at 14¢ per kWh, the rate the FTC requires on labels.
Full specs
At the U.S. average residential rate this one costs $314 a year — about 55% more expensive to run than the average heat pump water heater ($203 a year across 510 certified models).
Every model on this scale is ENERGY STAR certified. Range across 510 heat pump water heaters, priced a year at the U.S. average residential rate.
- Brand
- Smart Solar
- Model number
- SSG2-ES 120
- Type
- Heat pump water heater
- Capacity
- 120 gallons
- Annual energy use
- 1,741 kWh a year
- Combined Energy Factor (CEF)
- 2.85
- ENERGY STAR Most Efficient
- No
- On the market since
- January 2024
- Certified
- January 2024
- Tank volume (gallons)
- 120
- First-hour rating (gallons)
- 83
- Uniform Energy Factor (UEF)
- 2.85
- Draw pattern
- High-Usage
- Heat pump type
- Split System HPWH
- Recovery efficiency (%)
- 287.00
- Tank height (in)
- 64
- Tank diameter (in)
- 28
Where to buy
We do not sell appliances. These open a search on the retailer's own site.
Common questions
+How much does the Smart Solar SSG2-ES 120 cost to run per month?
about $26 a month at the U.S. average residential rate of 18.0¢ per kWh, or $314 a year. Your cost depends on your state's rate — see the table above.
+How many kWh does the Smart Solar SSG2-ES 120 use?
1,741 kWh a year, as the manufacturer filed it with the EPA, in the ENERGY STAR certified product database.
+Is the Smart Solar SSG2-ES 120 energy efficient?
It is listed as ENERGY STAR certified. It uses about 55% more electricity than the average heat pump water heater (average: 1,123 kWh a year).
+How does the Smart Solar SSG2-ES 120 compare to the average water heater?
The average heat pump water heater in our database uses 1,123 kWh a year, costing $203 a year at the U.S. average residential rate. The Smart Solar SSG2-ES 120 uses 1,741 kWh a year, costing $314 a year.
How we calculate this
Annual energy use (1,741 kWh a year) is the figure the manufacturer filed for this model with the EPA, in the ENERGY STAR certified product database. Running cost is that figure multiplied by a state's average residential electricity price from the U.S. Energy Information Administration (12-month average through July 2026, average revenue per kWh).
The annual figure for a water heater assumes a hot water draw of 10, 38, 55 or 84 gallons a day, set by the heater's first-hour rating, per the DOE test procedure (10 CFR 430 Subpart B, Appendix E). Full methodology.
Sources: EPA ENERGY STAR certified product data, updated weekly · U.S. EIA electricity prices, 12-month average through July 2026.