What the A. O. Smith HPS10-66H45DV 2** costs to run
The A. O. Smith HPS10-66H45DV 2** is certified by ENERGY STAR at 1,233 kWh a year, more expensive than most models in its category to run among electric water heaters currently certified.
That $232 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
Efficient, or not, for a electric water heater
The category average is 1,105 kWh/yr; this model runs 11.6% above it, ranking 360 of 596 electric water heaters tracked here for running cost. That average is drawn from all 596 electric water heaters ENERGY STAR currently certifies, not an outside number, a $24/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the A. O. Smith HPS10-66H45DV 2**: Rinnai REHP80W ($231/yr, 1,230 kWh/yr), then A. O. Smith HPSN10-66H45DV 2** ($232/yr, 1,233 kWh/yr).
Same brand, different models
Ranked 26 of A. O. Smith's 61 certified electric water heaters, this sits between the HPS10-50H45DV 2** ($156/yr, the brand's cheapest) and the HPV10-80H01DV 2** ($311/yr, its priciest).
Cost over its typical lifespan
NAHB's Study of Life Expectancy of Home Components puts a typical electric water heater's service life at 11 years; run the A. O. Smith HPS10-66H45DV 2** that long and it costs about $2,550 in electricity, on top of whatever it cost to buy.
Weighing a replacement
Running above the category average, $232/year is exactly the kind of number that makes a newer, more efficient model pay for itself faster.
Worth comparing a few current certified models before deciding.
If you're keeping it
Whether or not the A. O. Smith HPS10-66H45DV 2** ever needs replacing, a repair is the more common failure for a electric water heater, one a protection plan budgets for ahead of time.
Where this number comes from
Ranked 360 of 596, the A. O. Smith HPS10-66H45DV 2** sits in the middle of the electric water heater category, see the guide to why your state changes this number for the other half of the math. The 1,233 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.