How Long Can a 12V Battery Run a TV?

How Long Can a 12V Battery Run a TV? - 12V 100Ah Lithium

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2 ай бұрын

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In this video, I talk about powering your TV off-grid, focusing on the efficiency and duration you can expect from a 12V lithium battery. Ever wondered, how long can a 12V battery run a TV? or more specific, How long can a 12V lithium battery run a TV? You're in the right place.
I'll break down the math for a 12V 100Ah lithium (LiFePO4) battery. Answering questions like: how many hours does a 100Ah battery last powering a television?
Starting with a simple walkthrough, I'll guide you through finding your TV's power consumption, whether through the label on the back, the manual, online resources, or an energy consumption meter-making sure you're equipped to do this calculation yourself. From there, we'll explore not just the active power consumption but also the often-overlooked aspects like idle consumption and the efficiency of the inverter, which are key factors that impact how long your battery can keep the TV running.
I'll do all the calculations, showing you how to account for everything from the TV's consumption to the inverter's efficiency and finally to the total usable energy in your 12V lithium or lead acid battery. Focusing on practical advice, I'll even share a tip that could significantly extend your battery life and efficiency by opting for a DC-to-DC converter over a traditional inverter setup, potentially offering up to 35% more viewing time.

Пікірлер: 104

@cleversolarpower Ай бұрын

🎁 Free Diagrams: cleversolarpower.com/free-diagrams/ 📖 My Best-Selling book on Amazon: cleversolarpower.com/off-grid-solar-power-simplified 💵Use coupon code: clever6 to get 6% discount for Litime batteries: cleversolarpower.com/litime (cheaper than amazon)

@seymourpro6097 2 ай бұрын

More important is "will the solar panels keep up with the electrical demand?" If you have 1200 watt hours to use, then you have 1200Wh (+20%) to put back into the battery before you have another battery full of TV watching. If the solar harvest isn't sufficient then it's not the battery but the recharging that's the problem.

@jab376 2 ай бұрын

Waoo ! Am glad to have found your channel. Know these practical calculations of real life solar energy usage situations, sets you apart from other channels. Please keep it up.

@cleversolarpower 2 ай бұрын

Thanks!

@kevinholland4156 2 ай бұрын

I have two 22" and 23" 12-volt tv's. I skip the inverter and don't need a buck inverter. The first TV is a Sylvox 4K smart TV, which uses 23 watts, and the second is a Pyle 1080 TV, which uses 20 watts. I bought them on Amazon. I really like your book.

@cleversolarpower 2 ай бұрын

Thanks for sharing your experience with 12V TV's. I'm sure other viewers will find this useful. Thanks for getting the book!

@brian7android985 Ай бұрын

Yeah, would be much more efficient if you just bypass the convertor in the TV and just go straight to the voltage it uses internally.

@samanjaff3529 Ай бұрын

Thanks very much, at last I understood what ah in battery's means, very good explaining, thanks again.

@cleversolarpower Ай бұрын

You are welcome!

@artgarcia3531 22 күн бұрын

Thanks

@CSIT-energy 2 ай бұрын

Nice video

@user-ib9gk4xw5m 2 ай бұрын

Thanks for the quality videos and pdf designs. Please make diagram for off-grid solar lithium powered cabin that can run small window unit air conditioner(dc/ ac ?}, fridge(I am considering a 12vdc compressor mid size one), minimal microwave use, modern tv, micro pc, modem/router, low draw security camera with NVR, , and a few led lights.

@integr8er66 2 ай бұрын

That is a huge system, primarily because of AC and refrigerator. Use a propane refrigerator and when AC is required just run a generator because its not worth the extra cost to size your solar system for the AC when you will only use it a few months a year, what do you do with the extra power the rest of the year? That is a waste. sizing a solar setup for a microwave Tv and lights is much much cheaper. you can do it with 600 watts of panels a 24 volt 100 amp hr battery and a 2kw inverter.

@dan32one44 2 ай бұрын

Good 👍 stuff

@cleversolarpower 2 ай бұрын

Glad you liked it!

@faunoaugusto8491 2 ай бұрын

What a channel with such useful content! Thank you! So rare to find information of this nature on the internet! Quick question: If the TV has a 12v adapter output, then that's better, right? Because there is no need to connect the inverter. I was thinking of buying a TV with an power consumption of 36W - with a 12v adapter (so there is no need to connect the inverter), is that too much power for a lithium battery? Should I look for a TV with a lower output wattage? Thanks for your help!

@cleversolarpower 2 ай бұрын

Yes, a DC tv will be more efficient. You can repeat the calculation with your 36W TV. 36W is perfect.

@MyKharli 2 ай бұрын

i get about 15 minutes with my old 12v lead acid 120ah ( i mean doesn't hold charge old ) leisure battery wired into an old 400w max ups whose original battery had died on a 140 to 200w pc depending on graphic card use . . I think my ups is not designed for long high loads without fan cooling . But i live very rurally and daily brief power cuts are common so this is all i need . Don't forget to plug the router in the ups either as often phone lines are ok when power down .

@jsEMCsquared 2 ай бұрын

What about a dc tv. I had a 9 inch dual ac 120 plus dc 12 volts portable

@vinmeg69 2 ай бұрын

Nice and clear, can you please make a video how to make an off grid solar system without a battery to use an AC air pump of 180 watts 220 volts. System needs only to run when the sun shines to add more air in my fish pond.

@cleversolarpower 2 ай бұрын

I have written a post about this, check it out on my website: cleversolarpower -> off-grid-solar-without-battery

@cocolandstudio 2 ай бұрын

man i love this channel !! i've learned a lot ! thank you so much Master

@cleversolarpower 2 ай бұрын

Thanks!

@mitch3424 2 ай бұрын

to what voltage do you discharge the battery too if charged it starts at 12.8v ?

@jasonbroom7147 2 ай бұрын

LFP batteries usually "rest" (after charging) at around 13.6 volts and the BMS will typically cut of discharge current at around 2.5 volts per cell, or 10 volts, for a 12.8v nominal battery. (After discharge is cut off, cells will recover to around 11.5 volts, but it must now be charged.)

@mitch3424 2 ай бұрын

@@jasonbroom7147 thank you 👍

@egoda 2 ай бұрын

Can you teach us about Dc shunts. I would like to know how to size shunt (amps) for my solar system.

@warsaw28 2 ай бұрын

Nice. 😜

@meditationmelodymusic537 Ай бұрын

I live in SEA and its all DC power and appliances so do I need an inverter? I would think no.

@cleversolarpower Ай бұрын

If you only run DC power, and it matches your battery voltage, then you don't need an inverter. You can use a converter to change from 24 or 48V battery to let's say 12v.

@meditationmelodymusic537 Ай бұрын

@@cleversolarpower Thank You, I have another question, I have a solar 600 watt well submisable pump on 2 - 325 watt solar panels and trying to add a battery or batteries for night time and can not find any information on how to do this add batteries Litium Ion 12 Volt 100 ah what would I need to buy or do? thank You again

@Tab7.6.Tab7.6 Ай бұрын

@@meditationmelodymusic537 For what operating voltage is the pump?

@nndata 2 ай бұрын

Finlux 24" Smart TV only use 19 W, recommended

@cleversolarpower 2 ай бұрын

For that price, it's a steal!

@dr_jaymz 2 ай бұрын

The irony is that led tv's use at most 5v. Even older ones used to use around 12v for b+. On top of which most modern switched mode power supplies are happy to work with anything above 80v ac or dc they don't care they rectify it. 12V lead acid with 100ah is 100ah by its definition so its 1200Wh both chemistries have a capacity dependent on load. A typical 100ah lead acid will be more than that at very light load and considerably less at high load. The tv is a light load so you will get around 100ah.

@Ts6451 2 ай бұрын

Sure, you can extract all the power from a lead acid battery, but you generally don't want to do that for cyclic use applications, since lead acid batteries tend to degrade more the deeper you discharge them. Of course, there are many factors involved, but as a rough rule for back of the envelope calculations, you can assume 400 cycles for 100% discharge, 1200 if you only use 1/2 the capacity, 2200 if you use 1/3, 3000 for 1/4. So, people generally advice that you over-provision a lead acid system with twice what you expect to need, as while it doubles the needed capacity, it triples the expected life. Of course, having an over-provisioned system does offer the option to actually use that extra power in an emergency/unplanned situation where the benefit of using the power might offset the degradation concerns.

@brianOcurradhin 2 ай бұрын

Efficiency Efficiency Efficiency

@crazysquirrel9425 2 ай бұрын

Mine runs a TV and cable box for about 6 hours continuously. Never tried with with a computer but I suspect the run time will be very short.

@cleversolarpower 2 ай бұрын

How big is your battery and how much power does it consume?

@crazysquirrel9425 2 ай бұрын

@@cleversolarpower I got it as a package deal with a 100w foldable panel. Not sure what size the battery in it. Can't be too big as it is not very heavy. TV draws 23w. Not sure about the cable box. Used it when we had an overnight power failure. Lasted just over 6 hours. Only needed it for short term temporary power, usually lighting was the intent.

@Tab7.6.Tab7.6 Ай бұрын

@@crazysquirrel9425 The weight & size in this case is not a factor, because in a set with a 100W panel you probably bought a powerstation based on Li-Ion or LFP cells. They have a much higher energy density with a much smaller size and weight, compared to classic batteries.

@utube521 8 күн бұрын

how many pens do U use per video?... btw... my tv runs from 12v

@cleversolarpower 6 күн бұрын

Haha, it's not my hand it's a software 😉 So my pens are still plenty.

@darrentylor5473 2 ай бұрын

Just find a tv that runs on dc... Even if you need 19 or 20Vdc a small transformer is still more efficient than an inverter...

@BLEACH500 2 ай бұрын

Im 158 into this video ill tell you now buy a 12v tv a good deep cycle battery a good panel and a good charger 😂

@maximusmeridius1240 2 ай бұрын

That's exactly what I have in my camper , it's never let me down.

@slomotrainwreck 2 ай бұрын

I have a 2009 Vizio 55 inch led TV, while watching a movie or KZfaq videos via FireTV stick the TV consumes between 150 watts up to a peak of 250 watts. I've since stopped watching TV, I just don't turn it on anymore and the savings on my electric bill is significant.

@jameshatton4405 2 ай бұрын

You don't need TV. I've got one just for playing movies. It's not even connected to aerial/antenna or internet.

@Tab7.6.Tab7.6 Ай бұрын

Maybe all you need is a more energy-efficient TV. My already "not-so-young" Samsung 49" LED curved draws an average of 55W, which is half of the power claimed in the specification (110W).

@jameshatton4405 Ай бұрын

@@Tab7.6.Tab7.6 dude that's some good usage for a 55 inch TV . Does your Samsung TV use an external power brick power supply (usually 120v or 240v AC to l down to 18v DC) or an internal internal power supply 120v/240v mains power directly into the TV?

@Tab7.6.Tab7.6 Ай бұрын

@@jameshatton4405 No no, I wrote 49“, not 55”. To be precise - Samsung UE49MU6272 Curved. Model with internal power supply, 230V main power supply goes directly into the TV. But that's not what I was going for. What I meant was that from time to time it is worthwhile to change devices and, for example, get rid of the old, power-hungry TV in exchange for a more energy-efficient LED or OLED. According to widely available data QLED TV 85“ = 140W, LED 65” = 120W, LED 55” = 60W and so on (average consumption), the values compared to your greedy Visio are definitely more acceptable. In addition, we gain better Smart features as well as image quality.

@Tab7.6.Tab7.6 Ай бұрын

@@jameshatton4405 No no, 49" with internal power supply.

@Weneedaworldcaliffat Ай бұрын

with a regular acid lead battery and an 300w invertor i used my tv32 inch 8h a day for a week and the battery not even 50% discharged

@Tab7.6.Tab7.6 Ай бұрын

It must be a seriously big battery 😉 Let's assume, simplistically, that a 300W inverter consumes about 10W on its own consumption (on average 0.6Ax12.7V + taking efficiency into account). A 32" TV needs, in an very optimistic scenario, 25W. Together we have 35W, multiplied by 8 hours we get 280Wh, this value multiplied by 7 days = 1960Wh. 1960Wh divided by a standard 12V lead-acid battery voltage gives a capacity of 163,33Ah. Because you wrote that after a week of such use the battery is not even 50% discharged, this means, that it must have a capacity of more than 326.66Ah. Where can I buy such a huge lead acid battery? Is this a battery from a forklift? 😁

@Weneedaworldcaliffat Ай бұрын

@@Tab7.6.Tab7.6 no just a regular camper deep discharge ...with no solar panel ...but yeah it is big like the size of 2 honda civic battery

@Tab7.6.Tab7.6 Ай бұрын

@@Weneedaworldcaliffat If it is a camper then the TV will rather be connected directly to the vehicle's DC12V installation, without the need for a 300W inverter. And then yes, there are single deep discharge batteries offered in big capacity, dedicated to campers.

@mervynsowman51 2 ай бұрын

Some inverters won't let you fully discharge a battery.

@adelaidemarie 2 ай бұрын

Fire tv 43” 63watts

@TechnoEveryday 2 ай бұрын

🎉🎉🎉

@LuciaGomez-yb3om 2 ай бұрын

My litime 3000 watt inverter only use 10Wh idle

@Tab7.6.Tab7.6 Ай бұрын

Yes, it is possible. My 1100/2200W 12/230V inverter draws 0.55A at idle, which for a battery voltage of 12.7V means less than 7W (or 7Wh per hour). The calculations in the video are examples, anyone can make their own on this basis.

@stevecam724 2 ай бұрын

Why not get a 12V tv and drop the inverter?

@androidbox3571 2 ай бұрын

It will depend upon the watt rating of the TV, you have 1200 watts available, high school physics.

@user-sr5tc3vq3z 2 ай бұрын

120v-60hz 2.5A

@Tab7.6.Tab7.6 Ай бұрын

120V x 2,5A = 300W.

@4486xxdawson 2 ай бұрын

Here is a tip ,,, convert the tv to 12 volt not the power from 12 to 110 , there is a video on it ,,,,,,,,,,, power converters are not efficient.....

@gushardy4421 2 ай бұрын

Are you familiar with ELECTRODACUS products?

@cleversolarpower 2 ай бұрын

No, I'm not. Should I?

@gushardy4421 2 ай бұрын

@cleversolarpower yes you should it's a game changer, in my opinion. The hands down top of the line BMS and charge controller.

@zalllon 2 ай бұрын

I don’t know any TVs or even computer monitors that have a power brick

@cleversolarpower 2 ай бұрын

I saw a fellow KZfaqr mention it on his channel. Ha has a van with a small tv screen. I figured I could mention it here in case someone has the same.

@peterpan31000 2 ай бұрын

They all have power bricks either external or internal, the electronics dont use 120volts its a lot less so there is always a stepdown transformer.

@ghz24 2 ай бұрын

Samsung tvs have a brick supply, at least the 32 inch I got did. It was the coolest thing about the TV I didn't like the "set up an account" part.

@panagdimi 2 ай бұрын

A device with an external power brick is easier to adapt to direct DC to DC power. But all electronic appliances will have inside the case a step down transformer and bridge rectifier which converts 120 AC (in the US at least) to DC voltage. Most likely that will be around 12 volts, so all you have to do is trace the circuit where the step down transformer is feeding to and provide your direct DC to DC there. If you know what you're doing (and always being extra careful) it's a good idea to measure the transformer's unloaded output voltage, and that will tell you what type of DC power you need to provide. And always take into consideration the necessary current requirements. At 120 voltage AC it will probably be a few amps but at 12 volts DC that number will be much higher so make sure your external brick can handle that. Fairly easy procedure if you know what you're doing, but do not attempt if you don't know (what you doing). 😋

@ghz24 2 ай бұрын

@@panagdimi That is true but alot more effort than picking a TV that already has one and just replicating the power plug type. I'd be uncomfortable doing modifications to a TV but completely comfortable replicating the 19 volt center positive power brick with a buck or boost converter. But good point if you want or already have a specific TV that doesn't have dc input.

@dellawrence4323 2 ай бұрын

Why are you using only 50% of the lead battery capacity in your calculations please Sir?

@cleversolarpower 2 ай бұрын

Because a lead acid battery is best to discharge only to 50% to increase it's battery life. It's a tradeoff we make to increase battery lifespan.

@CaptainLongbeardTuds Ай бұрын

I was always told never to discharge a lead acid battery more than 20%. An AGM battery goes down to 50% and lithium ion can safely be discharged by 80% of its full capacity...

@dellawrence4323 Ай бұрын

@@cleversolarpower I see, thankyou.

@dosdoktor Ай бұрын

Most TVs step down to 12V for all intents and purposes. Why do you invert?

@cleversolarpower Ай бұрын

Because most people have 110V or 230V available and don't have a 12V TV.

@TommyTemperShow 2 ай бұрын

I just use a 12 volt TV

@hawkofthenorth4829 2 ай бұрын

I can run a Gaming PC with 2 monitors consuming 135w for 8 hours without charging with my 100ah battery.

@Tab7.6.Tab7.6 Ай бұрын

But I understand that only 2 monitors consuming 135W together, without gaming PC? And that's why the 100Ah battery lasts for 8 hours?

@whydontyouaskme Ай бұрын

My monitor is 18inch uses 15watts at 50℅ brightness and 27 at 100% brightness. You do not need to use 100% Amazon purchase

@tibomoltini2851 2 ай бұрын

i like to calculate with Amps. 76w/12.8V=6 A 100Ah(battery)/6 = 16.66 h

@cleversolarpower 2 ай бұрын

Amps are useful if you know the voltage of the battery. 6A at a 24V battery is double the power than on a 12V battery. So I like to use watthours to make it universal.

@tibomoltini2851 2 ай бұрын

@@cleversolarpower thanks a lot for your channel, i learned a lot on solar installations 👍

@Tab7.6.Tab7.6 Ай бұрын

Calculations on a current basis should take into account the efficiency of the inverter. The most common situation is that with a 12/230V inverter, the current drawn from the battery is 1/10th of the power drawn at the output of the inverter. That is, in simple terms, loading the inverter with a power of 76W, 7.6A is drawn from the battery (at 12.7V). However, calculations on watt-hours are much more accurate, since the value of the current drawn increases as the voltage on the battery decreases.

@action4free369 Ай бұрын

Its the same with all battery typs. All with 100ah do exact the same think. P=uxi I love this braindead shit 😂😂

@mattarko 2 ай бұрын

Ye inverter is a waste of energy. Almost every devices use dc. This explain how inefficient is the process.

@cleversolarpower 2 ай бұрын

Yes, this is what most people forget about.

@Droningonuk Ай бұрын

Just get a 12v tv

@steveharrigan3425 Ай бұрын

writings won't help so use video to show how long it will last by watching the tv when it plugged in to it and show it and show the time but write in the board won't help and that will cause fake and not helping it at all and no math work need for that so show the real tv with power unit and the battery has been hook up is the best to see it got that so I don't trust this way got that

@cleversolarpower Ай бұрын

I tested this myself. Much better to present it on a whiteboard than a messy video.