Model
Samsung QN55S84FAF
Rank #80 means 79 of the 172 television models we track cost less to run each year; the 49th efficiency percentile means it uses less energy for its size than 49% of those models.
What does the Samsung QN55S84FAF cost to run per year?
Ranking #80 of 172, the Samsung QN55S84FAF runs at roughly $34 a year, neither the cheapest nor the priciest in its class. Normalized for capacity, it beats 49% of television models we track, an average result for the class. At 86.03 W in on-mode, its power draw is a direct input into that running-cost figure.
Immediately around it on the leaderboard, the Samsung QN55S85FAF at $33/yr runs a little cheaper and the Samsung QN55S90DAF at $34/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 QN55S84FAF's $34/yr adds up to roughly $238 in electricity alone, before purchase price or repairs.
By the numbers
The Samsung QN55S84FAF 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 $34/yr, here is what the Samsung QN55S84FAF 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 QN55S84FAF costs about $340. That is roughly $10 less than the class median, which would run closer to $350 over the same ten years.
How the Samsung QN55S84FAF compares
The television class we track runs from $3 to $117 a year. At $34/yr, it runs about $1 a year cheaper than the class median of $35, and it is about $31 a year more than the cheapest television to run at $3.
What drives its running cost
At 54.6 in, the Samsung QN55S84FAF is a mid-size television for its class, which spans 13.23 to 114.4 in with a median of 55 in, neither the size advantage of a small unit nor the size penalty of a large one applies here, so its running cost is a fairer test of efficiency alone. 86.03 W is the on-mode draw behind this figure (the class spans 9.3 to 343.5 W); two otherwise similar TVs can differ here mostly on picture-mode defaults rather than panel technology.
- 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 QN55S84FAF cheap to run?
It is about average. At $34 a year it ranks #80 of 172 television models we track, close to the middle of its class on running cost.
How much does the Samsung QN55S84FAF cost per month?
Roughly $2.8/mo, spreading the $34/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 181 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $34 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Samsung QN55S84FAF for its size?
49th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 79 | Samsung QN55S85FAF54.6 in | $33 |
| 78 | Lg OLED55B4PU*54.6 in | $33 |
| 77 | Philips 65HFL6214U/2764.5 in | $33 |
| 76 | Samsung QN55S85HAE54.6 in | $33 |
| 75 | Lg OLED48B5***47.5 in | $33 |
Source
ES_1023593_QN55S84FAE_080120250825221_9728418View certified television listingsENERGY STAR data as of July 2026Samsung and QN55S84FAF 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.