WattCost

Data through April 2026

Running cost · Computer Monitors · ENERGY STAR certified

BenQ GW2490TC-T

At the standardized usage ENERGY STAR assumes, the BenQ GW2490TC-T consumes 36 kWh a year — about $6.83 at the U.S. average electricity rate ($0.57 a month). Compared with the median certified computer monitor, it uses 19% less electricity — rank 287 out of 1482. The same unit costs $4.48 a year in North Dakota but $17 in Hawaii — electricity rates, not the appliance, make the difference.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$6.83/yr

$2.09 · cheapest certified computer monitors$76 · priciest
Per month
$0.57
Per day
2¢
Certified use
36 kWh/yr
Screen size
23.8 in
Panel
TFT-LCD
On-mode power
11.54 W
Sleep-mode power
0.16 W
11 kWh403 kWh
Where the BenQ GW2490TC-T (▮) sits among all 1,482 certified computer monitors, by annual kWh

What it costs in every state

BenQ GW2490TC-T: 36 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$6.32
Alaska27.4¢$9.93
Arizona15.5¢$5.62
Arkansas14.2¢$5.14
California35.3¢$13
Colorado16.5¢$6.00
Connecticut32.2¢$12
Delaware18.8¢$6.82
District of Columbia25.4¢$9.22
Florida15.4¢$5.58
Georgia15.4¢$5.58
Hawaiipriciest46.6¢$17
Idaho12.7¢$4.61
Illinois20.5¢$7.43
Indiana17.9¢$6.50
Iowa13.9¢$5.03
Kansas15.8¢$5.73
Kentucky15.0¢$5.45
Louisiana14.4¢$5.24
Maine28.4¢$10
Maryland22.1¢$8.01
Massachusetts29.4¢$11
Michigan21.4¢$7.76
Minnesota16.4¢$5.95
Mississippi16.8¢$6.08
Missouri14.0¢$5.08
Montana13.9¢$5.04
Nebraska13.3¢$4.82
Nevada14.3¢$5.19
New Hampshire27.2¢$9.89
New Jersey23.5¢$8.54
New Mexico15.2¢$5.50
New York29.4¢$11
North Carolina16.3¢$5.90
North Dakotacheapest12.3¢$4.48
Ohio19.5¢$7.07
Oklahoma13.3¢$4.83
Oregon15.8¢$5.73
Pennsylvania21.5¢$7.79
Rhode Island28.3¢$10
South Carolina17.1¢$6.19
South Dakota14.5¢$5.27
Tennessee14.9¢$5.42
Texas17.0¢$6.17
Utah13.3¢$4.82
Vermont24.6¢$8.91
Virginia17.4¢$6.31
Washington14.4¢$5.21
West Virginia16.1¢$5.83
Wisconsin19.2¢$6.97
Wyoming14.7¢$5.33

Certified models closest in efficiency

computer monitors within reach of 36 kWh/yr
ModelkWh/yr$/yr (US avg)
ASUS BE24E, BE24EQSB, BE24EQSB-P, BE24EQSB-J, BE24EQSB-W, BE24EQSB-G, BE24EQSBZ, BE24EQSBY, C624EQS, C624EQS-P, C624EQS-J, C624EQS-W, C624EQS-G, C624EQSZ, C624EQSY, BE24EQK, BE24EQK-P, BE24EQK-J, BE24EQK-W, BE24EQK-G, BE24EQKY36$6.84
HP 524pf36$6.83
LG 22MP41536$6.83
DELL E2420Hf36$6.84
MSI PRO MAX 241PHW E1436$6.83
PHILIPS 241E2FD36$6.82

Run your own numbers

Your rate, your numbers

Per day
2¢
Per month
$0.56
Per year
$6.78

36 kWh/yr × 18.8¢/kWh = $6.78/yr

Prefilled with this model's certified 36 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 GW2490TC-T use?
ENERGY STAR certifies the BenQ GW2490TC-T at 36 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 GW2490TC-T cost to run per month?
About $0.57 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $6.83 a year. Your state's rate moves this up or down; see the table above.
Is the BenQ GW2490TC-T energy efficient?
It uses 19% less electricity than the median certified computer monitor, placing it in the efficient third of certified models.
What does the BenQ GW2490TC-T cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $4.48 a year in North Dakota (12.3¢/kWh) and $17 in Hawaii (46.6¢/kWh).

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