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RVing message boards => Destinations, RV Parks, Routes => Camping at Wal*Mart and other non-campgrounds => Topic started by: Contestedmilk on October 01, 2016, 04:25:24 PM

Title: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: Contestedmilk on October 01, 2016, 04:25:24 PM
I am currently full-timing in my Jayco Jay Feather Baja Sport pulled by a '04 Suburban. I am looking to add solar panels to my room in order to watch tv when boondocking. I am not sure how much power my tv requires.  I'm also not sure if I need to purchase another deep cycle battery so hold the solar power I will be collecting. I am quite new to RV life, (2 months to be exact) and am looking for advice and wisdom.
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: Gary RV_Wizard on October 01, 2016, 04:28:31 PM
Your tv runs on 120vac power, not 12v, so you need an inverter to make 120vac from 12vdc. Then you need battery(s) to store the power, since the DC power from the solar panel varies from zero to (whatever its max is). And you probably want to watch tv after dark, too.
Somewhere on the tv, and in its manual, it will state the wattage, or possibly the current (amps) @ 120v. Either one lets you calculate the power demand from battery/solar. At a rough guess, about 100 watts, which means a continuous 9 amps from whatever 12v source powers the inverter.
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: Frankedj on October 01, 2016, 04:38:43 PM
I used a Kill-a-Watt meter on my two flatscreens when I calculated my solar.

24" used 20 watts
48" used 60 watts
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: NevadaBrowndog on October 06, 2016, 05:33:42 PM
You can buy 12v televisions too, below is one but there are many.

https://www.amazon.com/SuperSonic-1080p-Widescreen-Compatible-24-Inch/dp/B0082ULKUE/ref=sr_1_1?ie=UTF8&qid=1475793170&sr=8-1&keywords=12v+tv
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: SeilerBird on October 06, 2016, 05:55:56 PM
I used a Kill-a-Watt meter on my two flatscreens when I calculated my solar.

24" used 20 watts
48" used 60 watts
The amount of power the TV draws will change depending on the volume of the TV and the brightness of the screen at the time you measure it.
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: Frankedj on October 06, 2016, 07:27:06 PM
The amount of power the TV draws will change depending on the volume of the TV and the brightness of the screen at the time you measure it.

I never use audio from a TV. It is either a sound system or sound bar for audio. I also took my measurements using the TV's as multiple computer monitors with white screens. I also tested them using fast moving graphics/video.

After taking measurements I rounded up.
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: SeilerBird on October 06, 2016, 07:37:24 PM
I was just pointing out that there really isn't one figure that you can rely on as the absolute power consumed by a TV. It varies, it is not like a hair dryer that is always the same wattage.
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: Frankedj on October 06, 2016, 08:58:40 PM
The Kill-a-Watt meter was essential when I started designing my electrical a year ago. Just hooked in the final piece 2 days ago. A Magnum 2000 watt pure sine inverter.
Title: Re: What is the needed wattage to power a standard 30'' LG TV while boondocking?
Post by: DearMissMermaid on October 09, 2016, 08:00:22 AM
Many TV's are already 12volt but come with a 110 cord only.

Amazon sells 12volt cords that work with these TV's.

My 16 inch is 12 volt but came with 110 cord. We have used it with a tiny 200 watt inverter. A 12 volt cord would make more sense since my RV came with 3 cigarette lighter outlets.

I used a computer display table mount attached to the corner of my booth table for mine. It goes up and down and rotates, so the TV can be aimed 360 degrees, super handy to watch it from anywhere in the forward section of the coach.

Where there is a will, there is a way.

Yeah, people laugh at my "tiny" 16 inch TV, but the color is vibrant and clear. It can be aimed at kitchen or club chairs or either side of the booth or in the middle for both booth sides to watch.

Alternatively I have a cord run from it to the stereo speakers, so if a really good movie is on, I can get great sound. Also have same cord running to the comfy chair with headset so when my friend visits and wants to watch shoot-em-up testosterone movies, I can listen to my music and he can wear TV headset. We both like this arrangement when need be.I think he likes it cause he can tune me out.  ::)

Alternatively get a tiny power inverter to run the TV only. They are fairly cheap from $20 or so.