If you’ve ever sat through a blackout mid-movie, spent a camping trip without enough juice for the TV (and the post-game show you’ve been looking forward to all week), or panicked when your client brought a 55-inch screen to a pop-up event we set up and we weren’t sure if our power station would cut it, you’ve probably asked the same question I get every single day: “What size of TV can a portable power station actually power?” Portable Power Station
I’m the co-founder of a portable power station company, and over the past 7 years, I’ve fielded this question from campers, tailgaters, event planners, and even folks stuck through grid outages in neighborhoods where the power company takes twice as long to fix a line as they say they will. The short answer isn’t as simple as “a 50-inch TV” or “a 75-inch TV”—it’s way more tied to two things most people don’t stop to break down first: how much power your TV actually uses, and how much usable power your portable power station has. Let me walk you through it, since I’ve seen too many people buy a power station that’s too small (or too big, wasting money they could’ve spent on extra batteries for their portable speaker instead) because they didn’t understand the basics.
First, let’s talk about TV power use—this is the part most websites will tell you wrong, because they’ll just pull a random “average” number and call it a day, but TVs don’t all use the same amount of power. Think about it: a tiny 24-inch kitchen TV is going to use way less than a 85-inch 4K smart TV that has 10 speakers built in, a backlight that’s way brighter than it needs to be, and is running 10 background apps while you watch. Even the same size TV can vary by brand and model—we’ve tested this with every major TV line over the past 5 years because we needed accurate numbers for our own customer guides.
Let’s break this down by screen size, and I’m going to use real numbers we collected from testing: a 24-inch LED TV uses about 30-50 watts when it’s on and at normal brightness. A 32-inch is 40-70 watts, a 43-inch runs 60-100 watts, 50-inch is 80-120 watts, 55-inch is 100-150 watts, 65-inch is 120-200 watts, 75-inch is 180-280 watts, and 85-inch? That big boy clocks in at 250-400 watts, depending on if it’s LED, QLED, or OLED. OLED TVs use a little less power than QLED when they’re showing dark screens, but way more when they’re showing bright, white images—so don’t just go by the label on the box, which usually only gives a maximum wattage, not the average you’ll actually use while watching.
Now, the next part: portable power station capacity. This is where so many people get confused, because power stations list their capacity in watt-hours (Wh), not watts, and not all of that is usable power. Let’s say you have a 1000Wh power station—you might think that means it can power a 100-watt TV for 10 hours, right? That’s not how it works. First, lithium-ion batteries (the kind all good portable power stations use) can’t discharge 100% of their power without damaging the battery long-term. Most quality power stations—including the ones we sell—have a “depth of discharge” (DoD) of around 80%, meaning you can only safely use 80% of the listed capacity. So that 1000Wh unit? That’s 800Wh of actual usable power for your devices.
Then there’s the inverter efficiency. The inverter is the part of the power station that turns the DC power from the battery into AC power that your TV uses. Cheaper power stations have inverters that are only 80-85% efficient, meaning 15-20% of the power is lost as heat when it’s converted. Good, high-quality inverters are 90-95% efficient—so 5-10% lost. For our power stations, we use 93% efficient inverters, so let’s do the math for that 1000Wh unit: 1000Wh x 0.8 (DoD) x 0.93 (inverter efficiency) = ~744Wh of actual power you can use on things like your TV.
Now, let’s put that together for the TV example. Let’s say you have a 55-inch TV that uses 120 watts on average. How long will that 1000Wh power station run it? Take the usable power (744Wh) divided by the TV’s wattage (120W) = 6.2 hours. That’s more than enough for a full movie, a post-game show, and a little extra to charge your phone while you’re at a tailgate, right?
But wait—what if you have a bigger TV, say a 75-inch that uses 250 watts on average. Let’s plug that same 1000Wh unit into the math: 744Wh divided by 250W = ~3 hours. That’s enough for two hours of your favorite show, but not a full 3-hour movie, and if you try to use other things at the same time (like a portable cooler, or your laptop), that time drops even more. That’s why we get so many emails from customers who bought a cheap 1000Wh power station online, tried to run their 75-inch TV, and said it died way too fast. They didn’t account for DoD, inverter loss, and the actual wattage of their big TV—they just saw “1000Wh” and thought it could power anything.
Let’s go through common scenarios, since that’s what most people are here for. If you’re a weekend camper who wants to watch a movie after dark with your family, what size power station do you need? If you have a 50-inch or smaller TV, a 500Wh power station will work. Let’s test that: 500Wh x 0.8 DoD x 0.93 inverter = 372Wh usable. A 50-inch TV uses 100 watts average, so 372 / 100 = ~3.7 hours. That’s perfect for a 2-hour movie with an hour left to spare. If you have a 55 or 65-inch TV, step up to a 1000Wh power station, which gives you 6 hours with a 55-inch, or 3 hours with a 65-inch.
Now, what if you’re hosting a tailgate with friends, and you want a 75-inch TV for the whole game? Most NFL games are 3 hours, college games can be 3.5 or 4 hours, so you need enough power to cover that, plus maybe a little extra. A 75-inch TV uses 250 watts average, so over a 4-hour game, that’s 1000Wh of power just for the TV. You’d want at least a 1500Wh power station here—1500Wh x 0.8 DoD x 0.93 inverter = ~1116Wh usable, which is just enough for 4 hours (250W x 4 = 1000Wh). If you want to add a portable grill fan, a speaker, and charge a few phones, go up to 2000Wh, which gives you ~1488Wh usable—way more than enough for a full game plus extra.
What about grid outages? If you’re keeping a TV on during a blackout, you might not need it on 24/7, but you want enough power to watch the news, a show, and maybe a movie over the course of a few days. If you have a 65-inch TV, that’s 200 watts average. Let’s say you use it 2 hours a day: 400Wh per day. A 2000Wh power station (the size most people get for home backup) would give you ~1488Wh usable, so that’s almost 4 days of TV time. Add a few LED bulbs, a fridge, and some phone chargers, and a 2000Wh is still manageable—just don’t run your TV 8 hours a day, obviously.
Wait, what about OLED vs. QLED vs. LED? I mentioned this earlier, and it’s a common question. OLED TVs use less power when showing dark content, but when they’re showing bright, white scenes (like a soccer field, or a news broadcast with a white background), they use almost the same as QLED or LED. We tested a 65-inch OLED vs. a 65-inch QLED side by side: when watching a dark movie, the OLED used 130 watts, the QLED used 150 watts. When watching a bright football game, the OLED used 190 watts, the QLED used 185 watts. So the difference is small for average use, but if you’re watching content with a lot of dark scenes, OLED can save you a little power, which adds a fraction more runtime on your power station.
Now, what are the mistakes we see people make all the time? First, buying a power station that only lists “max” inverter capacity, not continuous capacity. A lot of cheap power stations will say they have a 2000W inverter, but that’s only a 10-second surge—your TV only needs about 100-200 watts to start, and then runs on a steady 80-150 watts. If a power station has a 1000W continuous inverter, that means it can power things that need up to 1000 watts nonstop, which is what you need for a TV. A lot of folks will buy a power station with a big surge rating but small continuous rating, and wonder why their TV won’t turn on—because the inverter can’t handle the steady load. That’s why all our power stations list both surge and continuous inverter rating, front and center, so you don’t make that mistake.
Another mistake: not accounting for other devices. If you’re powering your TV plus a soundbar, plus a streaming stick, plus a portable cooler, all that adds to the total wattage. A soundbar uses 20-50 watts, a streaming stick uses 5-10 watts, so add 60 watts to your total if you have those, which means your power station will run the TV a little less. We always tell customers to add 10-20% to the TV’s wattage to cover extra accessories, just to be safe.
What about TVs that use 12V vs. 110V/220V power? Most modern TVs use standard AC power (110V in North America, 220V in Europe, AU, etc.), which is what all portable power stations output. Older TVs, especially RV or boat TVs, might be 12V DC, which you can plug directly into a car port on the power station—no inverter needed, so you lose zero power to conversion, which gives you a little extra runtime. That’s a good tip for anyone with an older TV, or a TV in an RV: check if it’s 12V first, that’ll save you some wattage.
Let’s test a real customer example, because I had one last month that shows how this all works. A guy reached out to us, said he had a 75-inch TV and wanted to take it camping, and had a 1000Wh power station he bought from a big-box store online. He said it only ran his TV for 1.5 hours, which was way less than he expected. We walked him through the numbers: his TV is a 75-inch QLED, which we tested at 270 watts average when watching a bright movie (higher than our earlier average, because he likes his screen at full brightness, which is common). The power station he bought had a 75% DoD (cheaper batteries) and a 82% efficient inverter, so usable power was 1000Wh x 0.75 x 0.82 = 615Wh. 615 divided by 270 watts = ~2.2 hours, which is close to what he got, but he was also running a portable speaker that uses 30 watts, so total wattage was 300 watts, so 615 / 300 = ~2 hours, and with inefficiency from the inverter, that dropped to 1.5. We suggested he upgrade to our 1500Wh power station, which has 80% DoD and 93% inverter efficiency, so usable power is 1500 x 0.8 x 0.93 = 1116Wh. Even with the TV at 270 watts and speaker at 30, that’s 1116 / 300 = ~3.7 hours, plus he has extra power for charging his phone and a portable cooler. He bought it, and sent a message a week later saying he watched a full 3.5-hour movie with his family and still had power left over—perfect.
Now, what about the future? A lot of newer smart TVs use even less power, thanks to better LED and OLED technology. We tested a new 2024 65-inch 4K smart TV last month that only uses 110 watts average, compared to 150 watts for a 2020 model, so that’s a 27% drop in power use. That means a power station will run newer TVs longer, so if you’re buying a new TV, keep an eye on the wattage listed for the specific model, not just the average for the size.
At the end of the day, there’s no one-size-fits-all answer to “what size TV can a portable power station power,” but the formula is simple: take the usable power of your portable power station (watt-hours x DoD x inverter efficiency), divide that by the total average wattage of your TV plus any accessories you’ll run with it, and that gives you the runtime. We’ve seen everything from tiny 24-inch TVs running on 100Wh power stations for 10 hours (great for kids’ movies at camp) to 85-inch TVs running on 3000Wh power stations for 5 hours (perfect for big outdoor events).
If you’re in the market for a portable power station for your TV, whether for camping, tailgating, backup power, or events, we can help you pick the right size—no guesswork, no overpaying for a unit that’s too big, no wasting money on a unit that’s too small. We’ve tested every model we sell with a wide range of TV sizes, and we can walk you through the exact runtime for your specific TV, accessories, and use case. If you’re ready to learn more or place an order, feel free to reach out to our team to connect on your needs.
References
All in One Home Energy Storage System U.S. Department of Energy, “Television Energy Use and Efficiency,” 2023.
Consumer Reports, “Portable Power Station Buying Guide,” 2024.
International Energy Agency, “Residential Appliance Energy Consumption Database,” 2023.
Energy Star, “TV Efficiency Specifications and Test Methods,” 2022.
Zhejiang Xiehang New Energy Equipment Co., Ltd.
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