A. O. Smith HPACO-45C 1**+AXST-80C 1**: running cost
ENERGY STAR certifies the A. O. Smith HPACO-45C 1**+AXST-80C 1** at 1,306 kWh/yr, more expensive than most models in its category to run for its category.
That $246 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 18.2% above it, ranking 473 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 $38/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 HPACO-45C 1**+AXST-80C 1**: A. O. Smith HPACO-45 1**+AXST-80TTP 1** ($246/yr, 1,306 kWh/yr), then A. O. Smith HPACO-45C 1**+AXST-80CTTP 1** ($246/yr, 1,306 kWh/yr).
Comparing A. O. Smith's own models
Ranked 40 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
Over the 11-year service life NAHB reports for this category, running the A. O. Smith HPACO-45C 1**+AXST-80C 1** costs roughly $2,701 in electricity, separate from the purchase price.
Is it worth replacing?
At $246/year, this is on the expensive side for a electric water heater; the cheapest certified model in this category runs about $121/year, worth knowing before buying either the A. O. Smith HPACO-45C 1**+AXST-80C 1** or its replacement.
Worth comparing a few current certified models before deciding.
If you're keeping it
$246/year to run is the predictable cost of the A. O. Smith HPACO-45C 1**+AXST-80C 1**; a protection plan covers the unpredictable one, a repair bill.
Where this number comes from
Ranked 473 of 596, the A. O. Smith HPACO-45C 1**+AXST-80C 1** 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 1,306 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.