Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
BenQ EW2790U-L
At the standardized usage ENERGY STAR assumes, the BenQ EW2790U-L consumes 78 kWh a year — about $15 at the U.S. average electricity rate ($1.22 a month). It sits near the bottom of the certified table — using 73% more than the median computer monitor (rank 1223 of 1482) — so the state you live in matters more than usual. Where you live moves the bill from $9.64 a year in North Dakota to $36 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$15/yr
- Per month
- $1.22
- Per day
- 4¢
- Certified use
- 78 kWh/yr
- Screen size
- 27 in
- Panel
- IPS LCD
- On-mode power
- 24.84 W
- Sleep-mode power
- 0.33 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $14 | |
| Alaska | 27.4¢ | $21 | |
| Arizona | 15.5¢ | $12 | |
| Arkansas | 14.2¢ | $11 | |
| California | 35.3¢ | $28 | |
| Colorado | 16.5¢ | $13 | |
| Connecticut | 32.2¢ | $25 | |
| Delaware | 18.8¢ | $15 | |
| District of Columbia | 25.4¢ | $20 | |
| Florida | 15.4¢ | $12 | |
| Georgia | 15.4¢ | $12 | |
| Hawaiipriciest | 46.6¢ | $36 | |
| Idaho | 12.7¢ | $9.91 | |
| Illinois | 20.5¢ | $16 | |
| Indiana | 17.9¢ | $14 | |
| Iowa | 13.9¢ | $11 | |
| Kansas | 15.8¢ | $12 | |
| Kentucky | 15.0¢ | $12 | |
| Louisiana | 14.4¢ | $11 | |
| Maine | 28.4¢ | $22 | |
| Maryland | 22.1¢ | $17 | |
| Massachusetts | 29.4¢ | $23 | |
| Michigan | 21.4¢ | $17 | |
| Minnesota | 16.4¢ | $13 | |
| Mississippi | 16.8¢ | $13 | |
| Missouri | 14.0¢ | $11 | |
| Montana | 13.9¢ | $11 | |
| Nebraska | 13.3¢ | $10 | |
| Nevada | 14.3¢ | $11 | |
| New Hampshire | 27.2¢ | $21 | |
| New Jersey | 23.5¢ | $18 | |
| New Mexico | 15.2¢ | $12 | |
| New York | 29.4¢ | $23 | |
| North Carolina | 16.3¢ | $13 | |
| North Dakotacheapest | 12.3¢ | $9.64 | |
| Ohio | 19.5¢ | $15 | |
| Oklahoma | 13.3¢ | $10 | |
| Oregon | 15.8¢ | $12 | |
| Pennsylvania | 21.5¢ | $17 | |
| Rhode Island | 28.3¢ | $22 | |
| South Carolina | 17.1¢ | $13 | |
| South Dakota | 14.5¢ | $11 | |
| Tennessee | 14.9¢ | $12 | |
| Texas | 17.0¢ | $13 | |
| Utah | 13.3¢ | $10 | |
| Vermont | 24.6¢ | $19 | |
| Virginia | 17.4¢ | $14 | |
| Washington | 14.4¢ | $11 | |
| West Virginia | 16.1¢ | $13 | |
| Wisconsin | 19.2¢ | $15 | |
| Wyoming | 14.7¢ | $11 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Acer EK271K | 78 | $15 |
| PHILIPS 328P6A | 78 | $15 |
| ViewSonic VS20235 | 78 | $15 |
| AOC U27U2DP | 78 | $15 |
| PHILIPS 279P1F | 78 | $15 |
| Lenovo L28u-35,E28u-20,T28us-20,H22280UL0,H22280UE0,L28**-**,E28**-**,T28**-**, H22280***(*can be 0-9,a-z,A-Z,+,-,\ or blank) | 78 | $15 |
Run your own numbers
Your rate, your numbers
- Per day
- 4¢
- Per month
- $1.22
- Per year
- $15
78 kWh/yr × 18.8¢/kWh = $15/yr
Prefilled with this model's certified 78 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 EW2790U-L use?
- ENERGY STAR certifies the BenQ EW2790U-L at 78 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 EW2790U-L cost to run per month?
- About $1.22 a month at the U.S. average residential rate (18.8¢/kWh) — 4¢ a day, or $15 a year. Your state's rate moves this up or down; see the table above.
- Is the BenQ EW2790U-L energy efficient?
- It uses 73% more electricity than the median certified computer monitor, which puts it among the least efficient certified models.
- What does the BenQ EW2790U-L cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $9.64 a year in North Dakota (12.3¢/kWh) and $36 in Hawaii (46.6¢/kWh).