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 > How big of an Inverter to run a TV and direct tv box?

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rbmurray210

VA

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Posted: 04/28/11 08:50pm Link  |  Print  |  Notify Moderator

Hey guys and gals how big of an inverter would a person need to run a 19" tv and direct tv box only? and about how long would it run on 12v battery with a good charge?

More To See

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Posted: 04/28/11 09:07pm Link  |  Print  |  Notify Moderator

19 inch Visio draws about 70 watts name plate, but I just measured it at 18 watts without any signal for a picture.
DTV box draws 35 watts

Thus a standard 150 watt inverter would more than handle the 105 or so watts you need. I like to use a pure sine wave inverter on all electronics. But they are much more expensive.

The inverter would draw about 10 amps so you should be able to run it off a battery for maybe 20 hours -- but it depends on how far down you want to draw the battery.

* This post was edited 04/28/11 09:29pm by More To See *


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hershey

Albuquerque,(fulltime) NM, USA

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Posted: 04/28/11 10:17pm Link  |  Print  |  Notify Moderator

I ran a tube TV and satellite receiver with a 400 watt inverter. I'd suggest you get a 600 watt. That will be more than adequate and won't cost any more money. I think I only paid about $25 for the one I used.


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Keith M

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Posted: 04/28/11 10:48pm Link  |  Print  |  Notify Moderator

The newer the equiptment with the energy star tag will use a lot less electricty than 10 year old stuff. As an example last year I swapped out a Dish Receiver that was using 45 watts do a Direct TV receiver that only uses 9 watts. In fact Direct has one receiver thats only 7 watts. My old tube TV used 120 watts. I went to a slightly bigger LCD set that uses 56 watts. I cut my consumption to about a third of what it was. Vizio and a couple of others make 19 inch sets that are in the 33 watt range. If you go that way you are down to 40 watts. You could probably go about 4-5 hours on a single good battery for one night. The next day unless its on a charger all day it wont get charged up and then you will be down to two hours of run time. If you wanted to do this right you would get two batteries, preferably golf cart batteries and run an lcd=led tv and the low wattage direct box. The following day put the batteries on a charger-generator for 2-3 hours. If you are running a tube tv on a single battery and an old receiver you will be lucky to get two hours.

* This post was edited 04/28/11 10:55pm by Keith M *

Keith M

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Posted: 04/28/11 10:53pm Link  |  Print  |  Notify Moderator

Get as big an inverter as you can afford. The smaller inverters will have a fan that runs all the time and they arent as efficient. I wouldnt get anything less than 800 watts. I know you dont need it but for an extra $50 or so it will be worth it. The fan can be annoying when watching tv. The bigger the inverter the less likely the fan will go on unless its under heavy load or it warm. Sometime you can find them in the $40 range on Ebay or occaisionally the Auto Zone, Pep Boys , Reillys etc will discount them steeply.

smkettner

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Posted: 04/28/11 11:18pm Link  |  Print  |  Notify Moderator

I use this one from GoPower



http://www.boatandrvaccessories.com/GP-SW300-12

As said you probably only need 150w, especially if you plan to just plug into the 12v connector. I chose this model for the low idle draw and the provision for a remote power switch. I hardwired it in behind the electric panel with an automatic transfer switch.


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jcamp123

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Posted: 04/29/11 05:12am Link  |  Print  |  Notify Moderator

I use a 700 watt unit. Runs my 32' TV, Satellite box, DVD player, switch box, small fan for Satellite receiver and enough left over to use a small crock pot.
Works for me,
Joe


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pianotuna

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Posted: 04/29/11 05:39am Link  |  Print  |  Notify Moderator

Hi,

I'd go 400 and lean towards 800 watts in size. That may allow small power tools to be used. I found an 800 watt toaster!!!


Regards, Don
Full Time in a Kustom Koach Class C 28'5", 256 watts Unisolar, 875 amp hours in two battery banks 12 volt batteries, Magnum 3000 watt PSW inverter.

Keith M

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Posted: 04/29/11 05:46am Link  |  Print  |  Notify Moderator

Since you posted on Class A I am going to assume you have more than one battery. I looked at a rig this year that came from the factory with 6 big deep cycle batteries. From my earlier post I mentioned 4-5 hours on the 40 watt low watt set up. However before you get the battery drained too far down you low voltage alarm will go off. Its relatively loud and very annoying. Most people who use these things alot will remove the alarm. It looks like a watch battery and can be safely removed. A bigger inverter in my opinion will have less chance of having the low voltage alarm go off.

skipnchar

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Posted: 04/29/11 06:57am Link  |  Print  |  Notify Moderator

About 400 watts MSW should do the job nicely and with high efficiency for a low initial cost.


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