ALSETRIA HPWH-80G vs AMERICAN HPACO-45 1+AXST-80 1: which uses less energy?

At the high draw pattern the ALSETRIA HPWH-80G uses 1,240 kWh a year and the AMERICAN HPACO-45 1**+AXST-80 1** 1,306 — 65 kWh (5%) less, about 653 kWh over ten years. Both are filed as an electric tank, so the comparison holds. Enter your ZIP below to price the difference.

Side by side

Compared within one class only: models filed as an electric tank at the high draw pattern.

Filed and computed figures
Figure	ALSETRIA HPWH-80G	AMERICAN HPACO-45 1+AXST-80 1
UEF (Uniform Energy Factor)	4 (better)	3.8
Energy use per year (kWh)	1,240 (better)	1,306
First hour rating (gal)	91	95
Rated storage volume (gal)	74	73
Installed cost range	$3,993–$4,924	$3,938–$4,714
ENERGY STAR certified	yes	yes
Sound level (dB)	49	not filed
Refrigerant	R-134a, GWP 1430	R-744 (CO2), GWP 1
On the market since	2024-11-10	2026-02-13

DOE CCD · 2026-09-19

What it costs to run

ALSETRIA HPWH-80G — 1,240 kWh a year AMERICAN HPACO-45 1**+AXST-80 1** — 1,306 kWh a year

ALSETRIA HPWH-80G is 66 kWh a year lower than AMERICAN HPACO-45 1**+AXST-80 1**.

DOE CCD · 2026-09-19

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Reliability

Not published: Reliability, failure rates and each model’s actual warranty term.

The registries these figures come from certify energy performance under a federal test; none of them records how long a unit lasts or how often it fails, so this page does not rank the two on reliability.

What is here instead:

The filed efficiency, capacity and tank size of both models, side by side below.
Both are ENERGY STAR certified, which requires a manufacturer warranty of at least six years; the actual term for each model is not published.
Time on the market, as filed with ENERGY STAR: the ALSETRIA HPWH-80G since 2024-11-10, the AMERICAN HPACO-45 1**+AXST-80 1** since 2026-02-13. A sale date, not a lifespan.

Which should you pick?

Pick the ALSETRIA HPWH-80G if running cost matters most: it uses 65 kWh less a year on the same test.
Pick the AMERICAN HPACO-45 1**+AXST-80 1** if you need more hot water in your busiest hour: it lists a first hour rating of 95 gallons against 91.
Neither if your household's busiest hour needs more than 95 gallons of hot water — neither lists more. Check whether a 75-gallon heater is enough.

Each model on its own

ALSETRIA HPWH-80G

Its filed figures, class position and running cost on your ZIP.
AMERICAN HPACO-45 1**+AXST-80 1**

Its filed figures, class position and running cost on your ZIP.