Data through June 2026
Running cost · Computer Monitors · ENERGY STAR certified
BenQ GW2791-L
The BenQ GW2791-L's certified consumption is 50 kWh per year, which prices out to about $9.16 at the national average rate — your hours of use scale that directly. That's close to the middle of the certified pack — about 11% above the median computer monitor, ranked 929 of 1530. Where you live moves the bill from $6.55 a year in Nevada to $26 in Hawaii.
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$9.16/yr
- Per month
- $0.76
- Per day
- 3¢
- Certified use
- 50 kWh/yr
- Screen size
- 27 in
- Panel
- TFT-LCD
- On-mode power
- 15.86 W
- Sleep-mode power
- 0.23 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $8.19 | |
| Alaska | 28.2¢ | $14 | |
| Arizona | 15.2¢ | $7.58 | |
| Arkansas | 14.1¢ | $7.05 | |
| California | 34.7¢ | $17 | |
| Colorado | 17.1¢ | $8.55 | |
| Connecticut | 24.3¢ | $12 | |
| Delaware | 19.3¢ | $9.63 | |
| District of Columbia | 24.4¢ | $12 | |
| Florida | 15.1¢ | $7.54 | |
| Georgia | 16.4¢ | $8.17 | |
| Hawaiipriciest | 52.7¢ | $26 | |
| Idaho | 14.4¢ | $7.18 | |
| Illinois | 19.9¢ | $9.93 | |
| Indiana | 17.5¢ | $8.74 | |
| Iowa | 15.9¢ | $7.96 | |
| Kansas | 15.7¢ | $7.85 | |
| Kentucky | 14.3¢ | $7.12 | |
| Louisiana | 13.5¢ | $6.74 | |
| Maine | 29.6¢ | $15 | |
| Maryland | 21.8¢ | $11 | |
| Massachusetts | 29.6¢ | $15 | |
| Michigan | 23.0¢ | $11 | |
| Minnesota | 17.5¢ | $8.75 | |
| Mississippi | 14.9¢ | $7.43 | |
| Missouri | 16.2¢ | $8.10 | |
| Montana | 15.1¢ | $7.56 | |
| Nebraska | 13.3¢ | $6.62 | |
| Nevadacheapest | 13.1¢ | $6.55 | |
| New Hampshire | 27.0¢ | $13 | |
| New Jersey | 24.9¢ | $12 | |
| New Mexico | 15.1¢ | $7.52 | |
| New York | 29.5¢ | $15 | |
| North Carolina | 14.7¢ | $7.36 | |
| North Dakota | 14.1¢ | $7.05 | |
| Ohio | 19.2¢ | $9.58 | |
| Oklahoma | 14.3¢ | $7.16 | |
| Oregon | 16.3¢ | $8.15 | |
| Pennsylvania | 21.7¢ | $11 | |
| Rhode Island | 29.2¢ | $15 | |
| South Carolina | 15.6¢ | $7.77 | |
| South Dakota | 15.4¢ | $7.67 | |
| Tennessee | 14.1¢ | $7.03 | |
| Texas | 15.9¢ | $7.96 | |
| Utah | 13.4¢ | $6.68 | |
| Vermont | 24.4¢ | $12 | |
| Virginia | 17.2¢ | $8.60 | |
| Washington | 14.9¢ | $7.45 | |
| West Virginia | 15.4¢ | $7.72 | |
| Wisconsin | 19.6¢ | $9.77 | |
| Wyoming | 15.2¢ | $7.61 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Lenovo A22270FT0 | 50 | $9.16 |
| Lenovo A24270FL0 | 50 | $9.15 |
| PHILIPS 222B9 | 50 | $9.15 |
| BLOOMBERG BFP300-24 | 50 | $9.17 |
| PHILIPS 27E1N1100A | 50 | $9.17 |
| ViewSonic VS18524 | 50 | $9.17 |
Run your own numbers
Your rate, your numbers
- Per day
- 3¢
- Per month
- $0.76
- Per year
- $9.17
50 kWh/yr × 18.3¢/kWh = $9.17/yr
Prefilled with this model's certified 50 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh (TEC) assumes the monitor is on 35% of the day and asleep the other 65%, per the ENERGY STAR test basis.
Questions, answered with the data
- How much electricity does the BenQ GW2791-L use?
- ENERGY STAR certifies the BenQ GW2791-L at 50 kWh per year. The certified annual kWh (TEC) assumes the monitor is on 35% of the day and asleep the other 65%, per the ENERGY STAR test basis.
- How much does the BenQ GW2791-L cost to run per month?
- About $0.76 a month at the U.S. average residential rate (18.3¢/kWh) — 3¢ a day, or $9.16 a year. Your state's rate moves this up or down; see the table above.
- Is the BenQ GW2791-L energy efficient?
- It uses 11% more electricity than the median certified computer monitor.
- What does the BenQ GW2791-L cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $6.55 a year in Nevada (13.1¢/kWh) and $26 in Hawaii (52.7¢/kWh).