Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
BenQ GW2790TC-T
At the standardized usage ENERGY STAR assumes, the BenQ GW2790TC-T consumes 39 kWh a year — about $7.34 at the U.S. average electricity rate ($0.61 a month). Compared with the median certified computer monitor, it uses 14% less electricity — rank 433 out of 1482. Where you live moves the bill from $4.81 a year in North Dakota to $18 in Hawaii. It also meets ENERGY STAR's stricter “Most Efficient” criteria.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$7.34/yr
- Per month
- $0.61
- Per day
- 2¢
- Certified use
- 39 kWh/yr
- Screen size
- 27 in
- Panel
- TFT-LCD
- On-mode power
- 12.05 W
- Sleep-mode power
- 0.36 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $6.79 | |
| Alaska | 27.4¢ | $11 | |
| Arizona | 15.5¢ | $6.03 | |
| Arkansas | 14.2¢ | $5.52 | |
| California | 35.3¢ | $14 | |
| Colorado | 16.5¢ | $6.45 | |
| Connecticut | 32.2¢ | $13 | |
| Delaware | 18.8¢ | $7.32 | |
| District of Columbia | 25.4¢ | $9.90 | |
| Florida | 15.4¢ | $6.00 | |
| Georgia | 15.4¢ | $5.99 | |
| Hawaiipriciest | 46.6¢ | $18 | |
| Idaho | 12.7¢ | $4.95 | |
| Illinois | 20.5¢ | $7.98 | |
| Indiana | 17.9¢ | $6.98 | |
| Iowa | 13.9¢ | $5.40 | |
| Kansas | 15.8¢ | $6.15 | |
| Kentucky | 15.0¢ | $5.85 | |
| Louisiana | 14.4¢ | $5.63 | |
| Maine | 28.4¢ | $11 | |
| Maryland | 22.1¢ | $8.60 | |
| Massachusetts | 29.4¢ | $11 | |
| Michigan | 21.4¢ | $8.34 | |
| Minnesota | 16.4¢ | $6.39 | |
| Mississippi | 16.8¢ | $6.53 | |
| Missouri | 14.0¢ | $5.46 | |
| Montana | 13.9¢ | $5.42 | |
| Nebraska | 13.3¢ | $5.18 | |
| Nevada | 14.3¢ | $5.57 | |
| New Hampshire | 27.2¢ | $11 | |
| New Jersey | 23.5¢ | $9.17 | |
| New Mexico | 15.2¢ | $5.91 | |
| New York | 29.4¢ | $11 | |
| North Carolina | 16.3¢ | $6.33 | |
| North Dakotacheapest | 12.3¢ | $4.81 | |
| Ohio | 19.5¢ | $7.60 | |
| Oklahoma | 13.3¢ | $5.19 | |
| Oregon | 15.8¢ | $6.15 | |
| Pennsylvania | 21.5¢ | $8.37 | |
| Rhode Island | 28.3¢ | $11 | |
| South Carolina | 17.1¢ | $6.65 | |
| South Dakota | 14.5¢ | $5.66 | |
| Tennessee | 14.9¢ | $5.82 | |
| Texas | 17.0¢ | $6.62 | |
| Utah | 13.3¢ | $5.18 | |
| Vermont | 24.6¢ | $9.57 | |
| Virginia | 17.4¢ | $6.77 | |
| Washington | 14.4¢ | $5.60 | |
| West Virginia | 16.1¢ | $6.26 | |
| Wisconsin | 19.2¢ | $7.49 | |
| Wyoming | 14.7¢ | $5.72 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| ASRock CL27FFBmost efficient | 39 | $7.33 |
| COMPUMAX ML2024CM | 39 | $7.33 |
| HP HP 527pfmost efficient | 39 | $7.33 |
| LG 22MB35DE | 39 | $7.35 |
| LG 24BL450Y | 39 | $7.35 |
| HP OMEN 24e | 39 | $7.33 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.61
- Per year
- $7.34
39 kWh/yr × 18.8¢/kWh = $7.34/yr
Prefilled with this model's certified 39 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 GW2790TC-T use?
- ENERGY STAR certifies the BenQ GW2790TC-T at 39 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 GW2790TC-T cost to run per month?
- About $0.61 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $7.34 a year. Your state's rate moves this up or down; see the table above.
- Is the BenQ GW2790TC-T energy efficient?
- It uses 14% less electricity than the median certified computer monitor, placing it in the efficient third of certified models. It also meets ENERGY STAR's Most Efficient criteria.
- What does the BenQ GW2790TC-T cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $4.81 a year in North Dakota (12.3¢/kWh) and $18 in Hawaii (46.6¢/kWh).