Lenovo 91AX: $15 a year to run
This model (Computers) uses 71 kWh of electricity a year, which costs about $15 a year and $150 over 10 years at 21.0¢/kWh.
Energy use
71 kWh
per year
Running cost per year
$15
21.0¢/kWh
Running cost over 10 years
$150
Efficiency rank
1,643 / 1,748
Product details
| Type | Desktop |
|---|---|
| Available since | March 14, 2025 |
Compared with the average model (Computers), this one costs about $10 more a year.
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| Lenovo 91F4 | 71 | $15 |
| Acer Veriton X6720G | 71 | $15 |
| Lenovo 12X8 | 71 | $15 |
| HP TPC-F134-MT | 69 | $14 |
| MSI EdgeMesa N AI+ X | 68 | $14 |
| Lenovo ThinkCentre M6e HPT | 68 | $14 |
| ASUS D700SFC | 66 | $14 |
| ASUS D700SF | 66 | $14 |
- Refrigerators
- Freezers
- Washing machines
- Dishwashers
- Tumble dryers
- Room air conditioners
- Dehumidifiers
- Water heaters
- Electric cooktops and ranges
- Televisions
- Air purifiers
Source: ENERGY STAR (U.S. EPA) · 21.0¢/kWh (August 2026) · Methodology