Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
SiComputer NI27
At the standardized usage ENERGY STAR assumes, the SiComputer NI27 consumes 39 kWh a year — about $7.36 at the U.S. average electricity rate ($0.61 a month). Compared with the median certified computer monitor, it uses 13% less electricity — rank 439 out of 1482. The same unit costs $4.83 a year in North Dakota but $18 in Hawaii — electricity rates, not the appliance, make the difference. It also meets ENERGY STAR's stricter “Most Efficient” criteria.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$7.36/yr
- Per month
- $0.61
- Per day
- 2¢
- Certified use
- 39 kWh/yr
- Screen size
- 27 in
- Panel
- TFT LCD
- On-mode power
- 12.42 W
- Sleep-mode power
- 0.18 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $6.81 | |
| Alaska | 27.4¢ | $11 | |
| Arizona | 15.5¢ | $6.05 | |
| Arkansas | 14.2¢ | $5.54 | |
| California | 35.3¢ | $14 | |
| Colorado | 16.5¢ | $6.47 | |
| Connecticut | 32.2¢ | $13 | |
| Delaware | 18.8¢ | $7.35 | |
| District of Columbia | 25.4¢ | $9.94 | |
| Florida | 15.4¢ | $6.01 | |
| Georgia | 15.4¢ | $6.01 | |
| Hawaiipriciest | 46.6¢ | $18 | |
| Idaho | 12.7¢ | $4.97 | |
| Illinois | 20.5¢ | $8.00 | |
| Indiana | 17.9¢ | $7.00 | |
| Iowa | 13.9¢ | $5.42 | |
| Kansas | 15.8¢ | $6.17 | |
| Kentucky | 15.0¢ | $5.87 | |
| Louisiana | 14.4¢ | $5.65 | |
| Maine | 28.4¢ | $11 | |
| Maryland | 22.1¢ | $8.63 | |
| Massachusetts | 29.4¢ | $12 | |
| Michigan | 21.4¢ | $8.36 | |
| Minnesota | 16.4¢ | $6.41 | |
| Mississippi | 16.8¢ | $6.55 | |
| Missouri | 14.0¢ | $5.48 | |
| Montana | 13.9¢ | $5.43 | |
| Nebraska | 13.3¢ | $5.19 | |
| Nevada | 14.3¢ | $5.59 | |
| New Hampshire | 27.2¢ | $11 | |
| New Jersey | 23.5¢ | $9.20 | |
| New Mexico | 15.2¢ | $5.92 | |
| New York | 29.4¢ | $12 | |
| North Carolina | 16.3¢ | $6.35 | |
| North Dakotacheapest | 12.3¢ | $4.83 | |
| Ohio | 19.5¢ | $7.62 | |
| Oklahoma | 13.3¢ | $5.20 | |
| Oregon | 15.8¢ | $6.17 | |
| Pennsylvania | 21.5¢ | $8.39 | |
| Rhode Island | 28.3¢ | $11 | |
| South Carolina | 17.1¢ | $6.67 | |
| South Dakota | 14.5¢ | $5.68 | |
| Tennessee | 14.9¢ | $5.84 | |
| Texas | 17.0¢ | $6.64 | |
| Utah | 13.3¢ | $5.20 | |
| Vermont | 24.6¢ | $9.60 | |
| Virginia | 17.4¢ | $6.80 | |
| Washington | 14.4¢ | $5.61 | |
| West Virginia | 16.1¢ | $6.28 | |
| Wisconsin | 19.2¢ | $7.51 | |
| Wyoming | 14.7¢ | $5.74 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| LG 24BP55Q | 39 | $7.36 |
| HP HP P22 G5 FHD Monitor | 39 | $7.36 |
| DELL E2225Hf | 39 | $7.35 |
| LG 22MB35DE | 39 | $7.35 |
| LG 24BL450Y | 39 | $7.35 |
| Samsung S24HG31*** (* = 0-9, A-Z or blank) | 39 | $7.38 |
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 SiComputer NI27 use?
- ENERGY STAR certifies the SiComputer NI27 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 SiComputer NI27 cost to run per month?
- About $0.61 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $7.36 a year. Your state's rate moves this up or down; see the table above.
- Is the SiComputer NI27 energy efficient?
- It uses 13% less electricity than the median certified computer monitor, placing it in the efficient third of certified models. It also meets ENERGY STAR's Most Efficient criteria.
- What does the SiComputer NI27 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $4.83 a year in North Dakota (12.3¢/kWh) and $18 in Hawaii (46.6¢/kWh).