Data through June 2026
Running cost · Computer Monitors · ENERGY STAR certified
ViewSonic VS17978
At the standardized usage ENERGY STAR assumes, the ViewSonic VS17978 consumes 39 kWh a year — about $7.06 at the U.S. average electricity rate ($0.59 a month). That's 14% less than the median certified computer monitor, placing it comfortably in the efficient third of the field (423 of 1530). Where you live moves the bill from $5.05 a year in Nevada to $20 in Hawaii.
Estimated annual running cost · U.S. average rate 18.3¢/kWh
$7.06/yr
- Per month
- $0.59
- Per day
- 2¢
- Certified use
- 39 kWh/yr
- Screen size
- 23.8 in
- Panel
- In-cell Self Capacitive type multi-point touch LCD
- On-mode power
- 8.88 W
- Sleep-mode power
- 1.98 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 16.4¢ | $6.31 | |
| Alaska | 28.2¢ | $11 | |
| Arizona | 15.2¢ | $5.84 | |
| Arkansas | 14.1¢ | $5.44 | |
| California | 34.7¢ | $13 | |
| Colorado | 17.1¢ | $6.60 | |
| Connecticut | 24.3¢ | $9.36 | |
| Delaware | 19.3¢ | $7.43 | |
| District of Columbia | 24.4¢ | $9.39 | |
| Florida | 15.1¢ | $5.81 | |
| Georgia | 16.4¢ | $6.30 | |
| Hawaiipriciest | 52.7¢ | $20 | |
| Idaho | 14.4¢ | $5.53 | |
| Illinois | 19.9¢ | $7.66 | |
| Indiana | 17.5¢ | $6.74 | |
| Iowa | 15.9¢ | $6.13 | |
| Kansas | 15.7¢ | $6.05 | |
| Kentucky | 14.3¢ | $5.49 | |
| Louisiana | 13.5¢ | $5.19 | |
| Maine | 29.6¢ | $11 | |
| Maryland | 21.8¢ | $8.41 | |
| Massachusetts | 29.6¢ | $11 | |
| Michigan | 23.0¢ | $8.85 | |
| Minnesota | 17.5¢ | $6.75 | |
| Mississippi | 14.9¢ | $5.73 | |
| Missouri | 16.2¢ | $6.24 | |
| Montana | 15.1¢ | $5.83 | |
| Nebraska | 13.3¢ | $5.10 | |
| Nevadacheapest | 13.1¢ | $5.05 | |
| New Hampshire | 27.0¢ | $10 | |
| New Jersey | 24.9¢ | $9.61 | |
| New Mexico | 15.1¢ | $5.80 | |
| New York | 29.5¢ | $11 | |
| North Carolina | 14.7¢ | $5.67 | |
| North Dakota | 14.1¢ | $5.44 | |
| Ohio | 19.2¢ | $7.39 | |
| Oklahoma | 14.3¢ | $5.52 | |
| Oregon | 16.3¢ | $6.28 | |
| Pennsylvania | 21.7¢ | $8.37 | |
| Rhode Island | 29.2¢ | $11 | |
| South Carolina | 15.6¢ | $5.99 | |
| South Dakota | 15.4¢ | $5.91 | |
| Tennessee | 14.1¢ | $5.42 | |
| Texas | 15.9¢ | $6.14 | |
| Utah | 13.4¢ | $5.15 | |
| Vermont | 24.4¢ | $9.41 | |
| Virginia | 17.2¢ | $6.63 | |
| Washington | 14.9¢ | $5.74 | |
| West Virginia | 15.4¢ | $5.95 | |
| Wisconsin | 19.6¢ | $7.53 | |
| Wyoming | 15.2¢ | $5.87 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| AOpen 27UT2most efficient | 38 | $7.06 |
| EIZO FlexScan EV2495 | 38 | $7.06 |
| ghia MG2223 | 39 | $7.06 |
| Lenovo T24d-30 | 38 | $7.06 |
| PHILIPS 240B9 | 39 | $7.07 |
| PHILIPS 242E2 | 38 | $7.06 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.60
- Per year
- $7.15
39 kWh/yr × 18.3¢/kWh = $7.15/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 ViewSonic VS17978 use?
- ENERGY STAR certifies the ViewSonic VS17978 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 ViewSonic VS17978 cost to run per month?
- About $0.59 a month at the U.S. average residential rate (18.3¢/kWh) — 2¢ a day, or $7.06 a year. Your state's rate moves this up or down; see the table above.
- Is the ViewSonic VS17978 energy efficient?
- It uses 14% less electricity than the median certified computer monitor, placing it in the efficient third of certified models.
- What does the ViewSonic VS17978 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $5.05 a year in Nevada (13.1¢/kWh) and $20 in Hawaii (52.7¢/kWh).