Model
Samsung QN50QN90DAF
Rank #70 means 69 of the 172 television models we track cost less to run each year; the 47th efficiency percentile means it uses less energy for its size than 47% of those models.
What does the Samsung QN50QN90DAF cost to run per year?
At $31 a year to run, the Samsung QN50QN90DAF sits close to the middle of its class on cost, ranking #70 of 172 television models we track. Once capacity is factored in, its efficiency percentile of 47 is fairly typical for the class, neither a standout nor a laggard. At 74.27 W in on-mode, its power draw is a direct input into that running-cost figure.
Immediately around it on the leaderboard, the Samsung QN55S85DAE at $31/yr runs a little cheaper and the Lg 65QNED82AU* at $32/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 Samsung QN50QN90DAF's $31/yr adds up to roughly $217 in electricity alone, before purchase price or repairs.
By the numbers
The Samsung QN50QN90DAF 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 $31/yr, here is what the Samsung QN50QN90DAF adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Samsung QN50QN90DAF costs about $310. That is roughly $40 less than the class median, which would run closer to $350 over the same ten years.
How the Samsung QN50QN90DAF compares
The television class we track runs from $3 to $117 a year. At $31/yr, it runs about $4 a year cheaper than the class median of $35, and it is about $28 a year more than the cheapest television to run at $3.
What drives its running cost
At 49.5 in, the Samsung QN50QN90DAF 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. At 74.27 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 Samsung QN50QN90DAF cheap to run?
It is about average. At $31 a year it ranks #70 of 172 television models we track, close to the middle of its class on running cost.
How much does the Samsung QN50QN90DAF cost per month?
Roughly $2.56/mo, spreading the $31/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 166 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $31 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Samsung QN50QN90DAF for its size?
47th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 69 | Samsung QN55S85DAE54.6 in | $31 |
| 68 | Lg OLED48C5***47.5 in | $30 |
| 67 | Xitrix XPN-DSA656065.18 in | $30 |
| 66 | Samsung QN48S90FAE47.5 in | $30 |
| 65 | Sansui LE-55VO54.6 in | $30 |
Source
ES_1023593_QN50QN90DAF_121720230835155_1844467View certified television listingsENERGY STAR data as of July 2026Samsung and QN50QN90DAF 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.