Data through April 2026
Running cost · Computer Monitors · ENERGY STAR certified
PHILIPS 243S9
The PHILIPS 243S9's certified consumption is 43 kWh per year, which prices out to about $8.04 at the national average rate — your hours of use scale that directly. Efficiency-wise it's unremarkable in a good way: within 5% of the median certified computer monitor (rank 628 of 1482). Where you live moves the bill from $5.27 a year in North Dakota to $20 in Hawaii.
Estimated annual running cost · U.S. average rate 18.8¢/kWh
$8.04/yr
- Per month
- $0.67
- Per day
- 2¢
- Certified use
- 43 kWh/yr
- Screen size
- 23.8 in
- Panel
- IPS LCD
- On-mode power
- 13.49 W
- Sleep-mode power
- 0.24 W
What it costs in every state
| State | Rate ¢/kWh | This model $/yr | Relative cost |
|---|---|---|---|
| Alabama | 17.4¢ | $7.44 | |
| Alaska | 27.4¢ | $12 | |
| Arizona | 15.5¢ | $6.61 | |
| Arkansas | 14.2¢ | $6.05 | |
| California | 35.3¢ | $15 | |
| Colorado | 16.5¢ | $7.06 | |
| Connecticut | 32.2¢ | $14 | |
| Delaware | 18.8¢ | $8.03 | |
| District of Columbia | 25.4¢ | $11 | |
| Florida | 15.4¢ | $6.57 | |
| Georgia | 15.4¢ | $6.56 | |
| Hawaiipriciest | 46.6¢ | $20 | |
| Idaho | 12.7¢ | $5.42 | |
| Illinois | 20.5¢ | $8.74 | |
| Indiana | 17.9¢ | $7.65 | |
| Iowa | 13.9¢ | $5.92 | |
| Kansas | 15.8¢ | $6.74 | |
| Kentucky | 15.0¢ | $6.42 | |
| Louisiana | 14.4¢ | $6.17 | |
| Maine | 28.4¢ | $12 | |
| Maryland | 22.1¢ | $9.43 | |
| Massachusetts | 29.4¢ | $13 | |
| Michigan | 21.4¢ | $9.14 | |
| Minnesota | 16.4¢ | $7.00 | |
| Mississippi | 16.8¢ | $7.16 | |
| Missouri | 14.0¢ | $5.98 | |
| Montana | 13.9¢ | $5.94 | |
| Nebraska | 13.3¢ | $5.67 | |
| Nevada | 14.3¢ | $6.10 | |
| New Hampshire | 27.2¢ | $12 | |
| New Jersey | 23.5¢ | $10 | |
| New Mexico | 15.2¢ | $6.47 | |
| New York | 29.4¢ | $13 | |
| North Carolina | 16.3¢ | $6.94 | |
| North Dakotacheapest | 12.3¢ | $5.27 | |
| Ohio | 19.5¢ | $8.32 | |
| Oklahoma | 13.3¢ | $5.68 | |
| Oregon | 15.8¢ | $6.74 | |
| Pennsylvania | 21.5¢ | $9.17 | |
| Rhode Island | 28.3¢ | $12 | |
| South Carolina | 17.1¢ | $7.29 | |
| South Dakota | 14.5¢ | $6.20 | |
| Tennessee | 14.9¢ | $6.38 | |
| Texas | 17.0¢ | $7.26 | |
| Utah | 13.3¢ | $5.68 | |
| Vermont | 24.6¢ | $10 | |
| Virginia | 17.4¢ | $7.42 | |
| Washington | 14.4¢ | $6.13 | |
| West Virginia | 16.1¢ | $6.86 | |
| Wisconsin | 19.2¢ | $8.20 | |
| Wyoming | 14.7¢ | $6.27 |
Certified models closest in efficiency
| Model | kWh/yr | $/yr (US avg) |
|---|---|---|
| ASUS VZ279HG | 43 | $8.04 |
| Acer EK271U_a | 43 | $8.04 |
| DELL P2425HEb | 43 | $8.04 |
| ASUS MB249 | 43 | $8.05 |
| DELL E2425Hf | 43 | $8.05 |
| AOC X24E4U | 43 | $8.05 |
Run your own numbers
Your rate, your numbers
- Per day
- 2¢
- Per month
- $0.67
- Per year
- $8.10
43 kWh/yr × 18.8¢/kWh = $8.10/yr
Prefilled with this model's certified 43 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 PHILIPS 243S9 use?
- ENERGY STAR certifies the PHILIPS 243S9 at 43 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 PHILIPS 243S9 cost to run per month?
- About $0.67 a month at the U.S. average residential rate (18.8¢/kWh) — 2¢ a day, or $8.04 a year. Your state's rate moves this up or down; see the table above.
- Is the PHILIPS 243S9 energy efficient?
- It uses 5% less electricity than the median certified computer monitor.
- What does the PHILIPS 243S9 cost to run in the cheapest vs. priciest state?
- At current residential rates it costs about $5.27 a year in North Dakota (12.3¢/kWh) and $20 in Hawaii (46.6¢/kWh).