Model
Lg OLED48G5SU*
Rank #48 means 47 of the 172 television models we track cost less to run each year; the 64th efficiency percentile means it uses less energy for its size than 64% of those models.
What does the Lg OLED48G5SU* cost to run per year?
At $25 a year to run, the Lg OLED48G5SU* runs cheaper than most models in its class, ranking #48 of 172 television models we track. Its 64th size-adjusted efficiency percentile is a step ahead of the class median, though not among the very top results. At 47.5 in, it is a small television for the class, which runs 13.23 to 114.4 in; size and efficiency are the two levers behind the figure above, and this dataset does not carry a separate efficiency-factor column for this class.
Immediately around it on the leaderboard, the Lg OLED42C4PU* at $25/yr runs a little cheaper and the Samsung QN42S90FAE at $26/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 OLED48G5SU*'s $25/yr adds up to roughly $175 in electricity alone, before purchase price or repairs.
By the numbers
The Lg OLED48G5SU* 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 $25/yr, here is what the Lg OLED48G5SU* 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 OLED48G5SU* costs about $250. That is roughly $100 less than the class median, which would run closer to $350 over the same ten years.
How the Lg OLED48G5SU* compares
The television class we track runs from $3 to $117 a year. At $25/yr, it runs about $10 a year cheaper than the class median of $35, and it is about $22 a year more than the cheapest television to run at $3.
What drives its running cost
At 47.5 in, the Lg OLED48G5SU* is a small television for its class, which spans 13.23 to 114.4 in with a median of 55 in, at the small end of the class, capacity itself is doing a lot of the work to keep that figure down, separate from how efficient the unit actually is.
- 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.
- 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.
- 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 OLED48G5SU* cheap to run?
Yes, relatively. At $25 a year it ranks #48 of 172 television models we track, in the cheaper part of its class to run.
How much does the Lg OLED48G5SU* cost per month?
Roughly $2.12/mo, spreading the $25/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 137 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $25 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Lg OLED48G5SU* for its size?
64th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 47 | Lg OLED42C4PU*41.6 in | $25 |
| 46 | Lg 50QNED85TU*49.5 in | $25 |
| 45 | Sansui LE-55V455 in | $25 |
| 44 | Sansui LE-50V149.5 in | $25 |
| 43 | Lg 55QNED82AU*54.6 in | $25 |
Source
ES_1118034_OLED48G5SU*_042720260608256_2842057View certified television listingsENERGY STAR data as of July 2026Lg and OLED48G5SU* 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.