12v TV: What features to look for

Discussion in 'TV & Satellite' started by Ridgeway, Mar 11, 2012.

  1. Ridgeway

    Ridgeway Funster

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    Will likely buy a 12v TV soon and had a look yesterday at the MH shop however prices were pretty high to me although they did try to justify this with picture quality and viewing angle. Now having never used a TV/DVD player in our caravan I can't really imagine what to look for. We'll only use it for DVD's and mainly just during journey time so it will be a small screen size but I wouldn't want to have a "can't see the picture from" every 15mins on a 1000km journey:cry:

    Have see some 13" LCD screens with built in DVD, specced at 25w (max) for about £200 here on ebay

    Anything to look out for regarding the spec ?
     
  2. GJH

    GJH Funster Life Member

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    You mention use mainly just during journey time so the first thing to consider is that the habitation 12v system is normally switched off when the engine is running so any TV or DVD player would have to be powered by internal batteries or from the engine battery.
     
  3. tonka

    tonka Funster Life Member

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    you dont have to have a 12v only tv...
    A mains one working via an invereter can be used..
    We have one from Asda. £85.. It's 16" led very light and slim, Low power consumption.. A 150w inverter from Maplins or even cheaper via ebay and your sorted...
    Whoops just noticed your going to use it for dvd and travel so this may not suit.. However a cheap system for when you are stationary..
     
  4. Ridgeway

    Ridgeway Funster

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    So the 2nd battery wouldn't be running when you are driving, is that correct ? Does that mean that any power is coming from the engines battery ? and if so I assume that is still OK, no ?
     
  5. JeanLuc

    JeanLuc Funster

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    This is more of an issue with British vans, resulting from some apparent agreement on safety. The leisure 12V system is disabled when the engine is started so that electronic items cannot affect the engine management system. However, it doesn't seem to bother German manufacturers (unless things have changed very recently). Our 12V leisure system remains live all the time the main 12V switch is on. I have seen reports of this problem from a number of British van owners, but never from the owner of a German or French van before.
     
  6. GJH

    GJH Funster Life Member

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    The main point is that you would have to draw power from the lighter socket(s) in the cab rather than the living area.

    AFAIK the leisure circuit is turned off when the engine is on in our Burstner but maybe that's my assumption having previously had an Elddis where it is definitely the case. I do know that 12v operation of the fridge is from the engine battery and only when the engine is running. The manual doesn't say one way or the other.
     
  7. Ridgeway

    Ridgeway Funster

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    OK thanks for that, I'll cheek with the dealer to see if the leisure battery runs while driving. This way I can take a supply for the TV from within main compartment.
     
  8. pappajohn

    pappajohn Funster Life Member

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    whether you run it from the engine battery or the hab battery you will need a voltage stabiliser when the engine is running or it may well blow the TV.

    with the engine running it can produce up to 14v to either/both batteries and many 'none motorhome specific' TV's cant tolerate a high voltage.

    STABILISER
     
  9. Terry

    Terry Funster

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    Hi you can check this yourself-start engine and have a look at your Ariel amplifier -if turned on red/green light will show, you can also take your 12v power from there to power your tv :Wink:
    terry
     
  10. pappajohn

    pappajohn Funster Life Member

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    but not very power efficient though.

    taking 12v DC, inverting it to 230v AC, then running through the TV's power supply to turn it back into 12v DC again.
    so much more efficient to plug directly into a 12v supply.
     
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  11. callumwa

    callumwa Read Only Funster

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    We have two TV's in the van.

    We added a cheap 15" LCD from Makro which is on a tv bracket on the bulkhead behind the driver. The boys watch this when travelling. It has built in DVD, and will also play movies from a USB stick. It has a very good picture and the viewing angles are fine as it is directly facing the passenger seats. Cost £99. It runs on 12V but only came with a transformer converting240 AC to 12V DC.

    Our 12V system is live whilst travelling, as long as it is switched on at the control panel.

    I fitted an additional 12V cigarette lighter socket next to the TV and made up a 12V lead with a cigar plug on the end. I have no stabiliser fitted. The TV runs fine whether the engine is running or stopped.

    Keeps the boys happy apart from them arguing over what to watch.....:cry:

    Callum
     
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  12. Ridgeway

    Ridgeway Funster

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    Think we'll have the same challenge here, 4 girls to argue over which film to pick :Doh:

    I'll just keep on rolling, rolling: and turn the radio up:Laughing:
     
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  13. Ridgeway

    Ridgeway Funster

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    I wondered about that, reckon you must loose at least 20% of your power this way. Will go for a dedicated 12v unit, just trying to find a good unit at the right price with built in DVD
     
  14. MikeD

    MikeD Funster

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    My autotrail switches off the 12v system when you start the engine - so powering a rear tv could be a problem. :Sad:
    MikeD
     
  15. Terry

    Terry Funster

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    Take a lead to tv straight from L/Bat :Wink:
    terry
     
  16. GJH

    GJH Funster Life Member

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    Forgot to post yesterday that when we took the van to get some diesel we checked the 12v leisure circuit with the engine running and found that it is live.

    You learn something every day :BigGrin:
     
  17. Ridgeway

    Ridgeway Funster

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    Need to check this with the dealer when I go back tomorrow, thanks for the reminder: one more for the list
     
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