A.O. Smith Voltex AL 80 Gal
#2 in 80 GallonFull review
A solid 240 V heater with leak protection included, sold at Lowe’s as the Signature 900 line.
Lowe's $2,798$2,798
The A.O. Smith Voltex AL 80 Gal is the better heat pump water heater overall, rated 3.8 to 3.7. The A.O. Smith Voltex AL 80 Gal leads on warranty. The LG Inverter Heat Pump 80 Gal wins on cold rooms.
LG Inverter Heat Pump 80 Gal
#5 in 80 GallonFull review
The pick for a cold garage or basement: its heat pump keeps working in rooms down to 23 °F. Sold through LG’s HVAC dealers.
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the A.O. Smith Voltex AL 80 Gal for warranty (10-year tank, 10-year parts, 1-year labor vs 10-year tank, 1-year parts).
- Choose the LG Inverter Heat Pump 80 Gal for cold rooms (heat pump runs down to 23 °F room air vs heat pump runs down to 37 °F room air).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 80 gallon heat pump water heater; a clear win is highlighted. How we rank explains each one.
| Factor weight | A.O. Smith Voltex AL 80 Gal | LG Inverter Heat Pump 80 Gal |
|---|---|---|
| Overall rating | 3.8/5 | 3.7/5 |
| Efficiency 35% | 63 3.88 UEF | 64 3.90 UEF |
| Hot water 20% | 80 95 gallons in the first hour | 76 94 gallons in the first hour |
| Warranty 20% | 75 10-year tank, 10-year parts, 1-year labor | 30 10-year tank, 1-year parts |
| Cold rooms 15% | 32 heat pump runs down to 37 °F room air | 88 heat pump runs down to 23 °F room air |
| Noise 10% | 69 45 dB(A) | 50 noise not published (neutral score used) |
Specifications
| A.O. Smith Voltex AL 80 Gal | LG Inverter Heat Pump 80 Gal | |
|---|---|---|
| Ratings (ENERGY STAR) | ||
| Size (nominal) | 80 gal | 80 gal |
| Tank volume (measured) | 82 gal | 72 gal |
| Uniform Energy Factor | 3.88 | 3.90 |
| First-hour rating | 95 gal | 94 gal |
| Draw pattern | High | High |
| Yearly energy use | 1,279 kWh | 1,272 kWh |
| Heat pump cut-off (low) | 37 °F | 23 °F |
| Sound level | 45 dB(A) | - |
| ENERGY STAR ID | 2408847 | 2682263 |
| Installation | ||
| Power | 240 V | 240 V |
| Circuit | 30 A, 208/240 V | 30 A, 208/240 V |
| Backup element | 4,500 W | 5,000 W |
| Operating air range | 37 to 120 °F | 23 to 120 °F |
| Minimum room size | 450 cu ft | 700 cu ft |
| Size | 69 in tall, 27 in across | 62.7 in tall, 19.7 in across |
| Weight | 302 lb | 224 lb |
| Refrigerant | R-134a | R-134a |
| Features | ||
| Wi-Fi | Built in | Built in |
| App | A. O. Smith (iCOMM) | LG ThinQ |
| Demand response port (CTA-2045) | Yes | - |
| Leak detection | Yes | - |
| Modes | Hybrid, Heat Pump, Electric, Vacation | Auto, Turbo, Heat Pump, Vacation |
| Warranty and models | ||
| Warranty | 10 yr tank, 10 yr parts, 1 yr labor | 10 yr tank, 1 yr parts |
| Also sold as | American HPS10280H045DV, Lochinvar HPSA080KD, Reliance 10-80-DHPTS, State HPSX-80-DHPT | - |
| Released | 2022-06 | 2023-04 |