Model
Lg OLED42C5***
Rank #54 means 53 of the 172 television models we track cost less to run each year; the 39th efficiency percentile means it uses less energy for its size than 39% of those models.
What does the Lg OLED42C5*** cost to run per year?
The Lg OLED42C5*** is a relatively cheap runner for its class: about $27 a year, rank #54 of 172. Its 39th size-adjusted efficiency percentile is a step behind the class median, though not among the weakest results. At 77.8 W in on-mode, its power draw is a direct input into that running-cost figure.
Immediately around it on the leaderboard, the Samsung QN50QN90FAF at $27/yr runs a little cheaper and the Sansui LE-55TA1 at $27/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A television typically stays in service for somewhere around 7 years; over that span, the Lg OLED42C5***'s $27/yr adds up to roughly $189 in electricity alone, before purchase price or repairs.
By the numbers
The Lg OLED42C5*** normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $27/yr, here is what the Lg OLED42C5*** adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Lg OLED42C5*** costs about $270. That is roughly $80 less than the class median, which would run closer to $350 over the same ten years.
How the Lg OLED42C5*** compares
The television class we track runs from $3 to $117 a year. At $27/yr, it runs about $8 a year cheaper than the class median of $35, and it is about $24 a year more than the cheapest television to run at $3.
What drives its running cost
At 41.5 in, the Lg OLED42C5*** is a small television for its class, which spans 13.23 to 114.4 in with a median of 55 in, and smaller television models generally cost less to run for the same job, all else being equal. At 77.8 W on-mode (the class spans 9.3 to 343.5 W), its power draw is what ENERGY STAR actually measured to produce this running-cost figure; brightness settings move that wattage more than screen size alone.
- On-mode brightness. The picture mode you leave a TV on, vivid or eco, moves its real-world wattage more than almost anything else you control directly.
- Screen size. A bigger panel needs more backlight or more emissive pixels to reach the same brightness, so energy use climbs with diagonal screen size across most panel technologies.
- Hours of use. ENERGY STAR's on-mode wattage figure assumes a standard number of hours per day; a TV left on longer than that, or used as ambient background noise, accumulates more of that hourly cost.
Common questions
Is the Lg OLED42C5*** cheap to run?
Yes, relatively. At $27 a year it ranks #54 of 172 television models we track, in the cheaper part of its class to run.
How much does the Lg OLED42C5*** cost per month?
Roughly $2.24/mo, spreading the $27/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 145 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $27 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg OLED42C5*** for its size?
39th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 53 | Samsung QN50QN90FAF49.5 in | $27 |
| 52 | Samsung QN48S90HAE47.5 in | $27 |
| 51 | Samsung QN43QN90DAF42.5 in | $27 |
| 50 | Lg 55QNED85TU*54.6 in | $26 |
| 49 | Samsung QN42S90FAE41.5 in | $26 |
Source
ES_1118034_OLED42C5***_110520240818736_4073844View certified television listingsENERGY STAR data as of July 2026Lg and OLED42C5*** are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.