Lenovo 91DE: $18 a year to run
This model (Computers) uses 85 kWh of electricity a year, which costs about $18 a year and $179 over 10 years at 21.0¢/kWh.
Energy use
85 kWh
per year
Running cost per year
$18
21.0¢/kWh
Running cost over 10 years
$179
Efficiency rank
1,694 / 1,748
Product details
| Type | Desktop |
|---|---|
| Available since | July 31, 2025 |
Compared with the average model (Computers), this one costs about $13 more a year.
More efficient alternatives
| Model | kWh/year | Cost/year |
|---|---|---|
| Acer Veriton Vero N4720GT | 85 | $18 |
| Acer Veriton M2250G | 85 | $18 |
| MSI PRO DP180 AI 8HG | 84 | $18 |
| Transource SCO-3050 | 84 | $18 |
| Acer Veriton X6240G | 83 | $18 |
| ELCOSYSTEMS V701ML-TWR | 83 | $17 |
| HP Elite SFF 800 G9 Desktop PC | 83 | $17 |
| ASUS D700MF | 83 | $17 |
- 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