Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
ViewSonic VS20439
At the standardized usage ENERGY STAR assumes, the ViewSonic VS20439 consumes 45 kWh a year — about $8.55 at the U.S. average electricity rate ($0.71 a month). Efficiency-wise it's unremarkable in a good way: within 1% of the median certified computer monitor (rank 752 of 1482). Where you live moves the bill from $5.60 a year in North Dakota to $21 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$8.55/yr
- Per month
- $0.71
- Per day
- 2¢
- Certified use
- 45 kWh/yr
- Screen size
- 23.8 in
- Panel
- IPS LCD
- On-mode power
- 14.43 W
- Sleep-mode power
- 0.2 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $7.90 | |
| Alaska | 27.4¢ | $12 | |
| Arizona | 15.5¢ | $7.02 | |
| Arkansas | 14.2¢ | $6.43 | |
| California | 35.3¢ | $16 | |
| Colorado | 16.5¢ | $7.51 | |
| Connecticut | 32.2¢ | $15 | |
| Delaware | 18.8¢ | $8.53 | |
| District of Columbia | 25.4¢ | $12 | |
| Florida | 15.4¢ | $6.98 | |
| Georgia | 15.4¢ | $6.97 | |
| Hawaiipriciest | 46.6¢ | $21 | |
| Idaho | 12.7¢ | $5.76 | |
| Illinois | 20.5¢ | $9.29 | |
| Indiana | 17.9¢ | $8.12 | |
| Iowa | 13.9¢ | $6.29 | |
| Kansas | 15.8¢ | $7.16 | |
| Kentucky | 15.0¢ | $6.82 | |
| Louisiana | 14.4¢ | $6.55 | |
| Maine | 28.4¢ | $13 | |
| Maryland | 22.1¢ | $10 | |
| Massachusetts | 29.4¢ | $13 | |
| Michigan | 21.4¢ | $9.71 | |
| Minnesota | 16.4¢ | $7.44 | |
| Mississippi | 16.8¢ | $7.61 | |
| Missouri | 14.0¢ | $6.36 | |
| Montana | 13.9¢ | $6.31 | |
| Nebraska | 13.3¢ | $6.03 | |
| Nevada | 14.3¢ | $6.48 | |
| New Hampshire | 27.2¢ | $12 | |
| New Jersey | 23.5¢ | $11 | |
| New Mexico | 15.2¢ | $6.88 | |
| New York | 29.4¢ | $13 | |
| North Carolina | 16.3¢ | $7.37 | |
| North Dakotacheapest | 12.3¢ | $5.60 | |
| Ohio | 19.5¢ | $8.84 | |
| Oklahoma | 13.3¢ | $6.04 | |
| Oregon | 15.8¢ | $7.16 | |
| Pennsylvania | 21.5¢ | $9.74 | |
| Rhode Island | 28.3¢ | $13 | |
| South Carolina | 17.1¢ | $7.74 | |
| South Dakota | 14.5¢ | $6.59 | |
| Tennessee | 14.9¢ | $6.78 | |
| Texas | 17.0¢ | $7.71 | |
| Utah | 13.3¢ | $6.03 | |
| Vermont | 24.6¢ | $11 | |
| Virginia | 17.4¢ | $7.89 | |
| Washington | 14.4¢ | $6.52 | |
| West Virginia | 16.1¢ | $7.29 | |
| Wisconsin | 19.2¢ | $8.72 | |
| Wyoming | 14.7¢ | $6.66 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| Acer V247Y | 45 | $8.55 |
| Acer B277U | 45 | $8.55 |
| ASUS VA27DCP | 45 | $8.55 |
| PHILIPS 27B2N22 | 45 | $8.55 |
| PHILIPS 27B2N3200A | 45 | $8.55 |
| HP HP 724pu | 45 | $8.55 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.71
- Per year
- $8.47
45 kWh/yr × 18.8¢/kWh = $8.47/yr
Prefilled with this model's certified 45 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 ViewSonic VS20439 use?
- ENERGY STAR certifies the ViewSonic VS20439 at 45 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 ViewSonic VS20439 cost to run per month?
- About $0.71 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $8.55 a year. Your state's rate moves this up or down; see the table above.
- Is the ViewSonic VS20439 energy efficient?
- It uses 1% more electricity than the median certified computer monitor.
- What does the ViewSonic VS20439 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $5.60 a year in North Dakota (12.3¢/kWh) and $21 in Hawaii (46.6¢/kWh).