Data through April 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 $7.25 at the U.S. average electricity rate ($0.60 a month). That's 15% less than the median certified computer monitor, placing it comfortably in the efficient third of the field (403 of 1482). Where you live moves the bill from $4.75 a year in North Dakota to $18 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$7.25/yr
- Per month
- $0.60
- 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 | 17.4¢ | $6.70 | |
| Alaska | 27.4¢ | $11 | |
| Arizona | 15.5¢ | $5.96 | |
| Arkansas | 14.2¢ | $5.45 | |
| California | 35.3¢ | $14 | |
| Colorado | 16.5¢ | $6.37 | |
| Connecticut | 32.2¢ | $12 | |
| Delaware | 18.8¢ | $7.23 | |
| District of Columbia | 25.4¢ | $9.78 | |
| Florida | 15.4¢ | $5.92 | |
| Georgia | 15.4¢ | $5.92 | |
| Hawaiipriciest | 46.6¢ | $18 | |
| Idaho | 12.7¢ | $4.89 | |
| Illinois | 20.5¢ | $7.88 | |
| Indiana | 17.9¢ | $6.89 | |
| Iowa | 13.9¢ | $5.34 | |
| Kansas | 15.8¢ | $6.08 | |
| Kentucky | 15.0¢ | $5.78 | |
| Louisiana | 14.4¢ | $5.56 | |
| Maine | 28.4¢ | $11 | |
| Maryland | 22.1¢ | $8.50 | |
| Massachusetts | 29.4¢ | $11 | |
| Michigan | 21.4¢ | $8.24 | |
| Minnesota | 16.4¢ | $6.31 | |
| Mississippi | 16.8¢ | $6.45 | |
| Missouri | 14.0¢ | $5.39 | |
| Montana | 13.9¢ | $5.35 | |
| Nebraska | 13.3¢ | $5.11 | |
| Nevada | 14.3¢ | $5.50 | |
| New Hampshire | 27.2¢ | $10 | |
| New Jersey | 23.5¢ | $9.06 | |
| New Mexico | 15.2¢ | $5.83 | |
| New York | 29.4¢ | $11 | |
| North Carolina | 16.3¢ | $6.26 | |
| North Dakotacheapest | 12.3¢ | $4.75 | |
| Ohio | 19.5¢ | $7.50 | |
| Oklahoma | 13.3¢ | $5.12 | |
| Oregon | 15.8¢ | $6.08 | |
| Pennsylvania | 21.5¢ | $8.27 | |
| Rhode Island | 28.3¢ | $11 | |
| South Carolina | 17.1¢ | $6.57 | |
| South Dakota | 14.5¢ | $5.59 | |
| Tennessee | 14.9¢ | $5.75 | |
| Texas | 17.0¢ | $6.54 | |
| Utah | 13.3¢ | $5.12 | |
| Vermont | 24.6¢ | $9.46 | |
| Virginia | 17.4¢ | $6.69 | |
| Washington | 14.4¢ | $5.53 | |
| West Virginia | 16.1¢ | $6.18 | |
| Wisconsin | 19.2¢ | $7.40 | |
| Wyoming | 14.7¢ | $5.65 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| AOpen 27UT2most efficient | 38 | $7.25 |
| EIZO FlexScan EV2495 | 38 | $7.25 |
| ghia MG2223 | 39 | $7.25 |
| Lenovo T24d-30 | 38 | $7.25 |
| PHILIPS 240B9 | 39 | $7.26 |
| PHILIPS 242E2 | 38 | $7.24 |
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 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 $0.60 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $7.25 a year. Your state's rate moves this up or down; see the table above.
- Is the ViewSonic VS17978 energy efficient?
- It uses 15% 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 $4.75 a year in North Dakota (12.3¢/kWh) and $18 in Hawaii (46.6¢/kWh).