inverter or 12v whats the difference?

Discussion in 'TV & Satellite' started by Summies, Jan 12, 2010.

  1. Summies

    Summies Read Only Funster

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    Hi all having trawled through the threads it seems aparent that most seem to go for a 12v tv. Having searched around i have narrowed my choice down to a few Tv sets one of which is appears to be an ac supply which i can use with an inverter. The inverter would also come in handy for other appliances aswell. My question is what is the downside of using an inverter? will it drain the battery more quickly.
    thanks.
     
  2. The vagabond

    The vagabond Read Only Funster

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    Hi,
    Using an inverter will consume power faster than running the same appliance direct from 12V. Another thing to bear in mind is that not all 230V appliances will run off an inverter. My lap top power supply actualy exploded as a result of running off an inverter. Having said all that, inverters are extremely useful devises to have.
     
  3. Summies

    Summies Read Only Funster

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    Thanks 12v it is then.
    All the 12v sets i have seen so far seem quite bulky and only carry a 12month warrenty so i guess cheap and chearfull.
     
  4. pappajohn

    pappajohn Funster Life Member

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    invertors are extremely useful but are also inefficient.

    most are only around 80 to 90 % efficient so for every 10 amp needed to power an appliance the invertor will use around 11 amps of battery power, the extra being lost as heat.
    if its left turned on it will still use power even if nothing is plugged in.

    for an LCD tv and digi/sat box you ideally need a 150watt invertor so it doesnt get too hot.
    the bigger the invertor, the bigger the wires feeding it...a 1000w invertor will probably have wires thicker than the starter motor cables on your van.
    because of this the invertor needs to be pretty close to the battery...further from the battery and you need even thicker wires.
    i have a 600w invertor and the cables are as thick as a cigarette and 40cm long

    as vagabond said a lot of sensitive equipment (laptops etc) wont run on a standard, modified sinewave invertor so for those items you will probably need a much more expensive pure sinewave version.
     
  5. The vagabond

    The vagabond Read Only Funster

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    I don't know what size TV you are intending to buy but we have owned several over the years, the best by far has been our current one which is made by a company that go by the name of Roadstar. It was recommended to us by several truck drivers, cheap it was not, bulky it is but we get fantastic pictures with just the set top aerial in most places. They used to be available in Currys.
     
  6. keith

    keith Funster

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    Got a NIKKAI TV off ebay, same as the one they sell in Maplins, for around £50 3 years ago, and if I don't tell you we have had no problems with it it should go for another 3 years. :Rofl1:

    Bugger it's bound to give up next week now. :RollEyes:
     
  7. pappajohn

    pappajohn Funster Life Member

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    looking through the posts im sure you've gathered a 230v tv with a 'black box' in the power lead is just a 12v tv.....most smaller, 15"/17"/19", are 12v through the 230v transformer box.

    buy a plug to fit the tv's power socket, make up a lead with the plug, and bin the 'black box' lead.
     
  8. Summies

    Summies Read Only Funster

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    thanks all,
    i will give it a go hopefully keep the kids happy whilst on the move.
     
  9. Johns_Cross_Motorhomes

    Johns_Cross_Motorhomes Trader - Motorhome & Accessory Sales

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    Unfortunately there are very few, if any, flat panel TV's made now with optional 12v plug in supply.

    I cant get any at all for my wholesale business, all 240v AC and they do Samsung, Hitatchi, Toshiba and other well known brands. Humax have stopped making TV's as well now.

    Peter
     
  10. Dodgey

    Dodgey Funster

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    looking through the posts im sure you've gathered a 230v tv with a 'black box' in the power lead is just a 12v tv.....most smaller, 15"/17"/19", are 12v through the 230v transformer box.

    buy a plug to fit the tv's power socket, make up a lead with the plug, and bin the 'black box' lead.



    .....and some of us (like me:thumb:) go for 12 volt to 12 volt smoothing widgets, Amperor do one, piece of mind.

    Like he said above some, not all, tellys are actually 12 volt via 'the brick' but they tend not to advertise it. Best bet is wander around you local electrical place/s and look at the back. Cable goes of to a brick and can be unplugged then have a look at the socket on the telly and odds on it'll say 12V (DC).
    We got one, after someone on here recommended, a Kenmark 19", very nice and not dear really, Comet or Currys, can't remember which. Bricks somewhere in it's wrapper, not needed, along with it's leg as I nailed it to the cupboard.
     
    Last edited: Jan 12, 2010
  11. hilldweller

    hilldweller Funster Life Member

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    Very little downside apart from the added wiring. The slight extra power isn't going to worry you.

    The big question is: cheap and cheerful inverter that might cause problems with sensitive equipment or expensive sinewave inverter that produces just what comes out of your house sockets. Your choice.

    A possible problem with a TV - top view/bottom view. We've just bought a Samsung for home, as we sit down the picture noticeably dims. It's obviously made for a low coffee table not high up to suit a kitchen. This would be a disaster on the wall of a MH. Staggeringly good picture otherwise.
     
  12. pappajohn

    pappajohn Funster Life Member

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    NOOOOO!!!!!!!

    to run the tv while 'on the move' it will need a voltage stabilizer.....

    you're vans alternator can produce upto 15v and the tv cant stand a voltage that high.

    this is the type i use.....another £40 but what cost a new tv everytime you start the engine.

    VOLTAGE STABILIZER
     
  13. spongy

    spongy Read Only Funster

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    we have an avtec tv runs on 240v or 12v we only ever use it on 12v and have no need for an inverter. Tv plays cd's dvd' has an analogue and digital tuner, gives an excellent picture. Only downside is cost about £380

    spongy
     
  14. Planetgen

    Planetgen Read Only Funster

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    I think Alden do one? I think its made just for motorhomes?
     
  15. Summies

    Summies Read Only Funster

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    do you run your avtex with a stabilizer whilst on the move?
    regards
     
  16. pappajohn

    pappajohn Funster Life Member

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    not sure but i think the avtex will run on 12v/24v dc and 230v ac directly so it wont need a stabilizer but at £380 i'd go for the stabilizer and a cheaper tv.
     
  17. Spireman

    Spireman Read Only Funster

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    Our 17" flat screen including Freeview and a DVD was £129.95 from Asda last year. I would have to go and look to be sure but I think the make is Beir(?) It has a plug/ transformer which plugs into a socket marked 12v. This got dumped, and we run it on an Amperor voltage stabiliser unit.
    I have seen very similar units in Tesco, recently, but with a different manufacturers name---
    Picture quality is great,sound quality not bad, tuning is stupidly easy, downside is I reckon it pulls around 60w.
    John
     
  18. pappajohn

    pappajohn Funster Life Member

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    if using a voltage stab, one thing to look for is the type of power socket.
    amporor have a good selection but dont cover them all.
    my last tv had a cicular, din type plug with 4 irregular offset pins....couldnt get a plug anywhere.

    as a last resort you can cut the plug off the black box and use that.
     
  19. JaG

    JaG Funster

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    12v TV/DVD

    We have a MEOS 12v/24v 15inch TV/DVD - see link below.
    It works fine on 12 volt and we have used our 150 watt Inverter on it as well with no problems.
    This is one awesome TV as it has:
    Analogue TV
    Digital TV
    DVD Player, which supports DIVX, so computer discs play in it
    Computer link, we use our netbook on it
    Best of all, well for the woman in your life, it has a card reader/recorder. You can set it up like Sky and record programmes while you are out. No excuse now not to go to the pub while Emmerdale is on.
    Although on the high side at £199 it is still cheap by other TV prices.
    Picks up really good, picture good, though the field of vision is quite narrow compared with expensive models. We are happy with it. Link here:
    http://cgi.ebay.co.uk/15-inch-Porta...tronics_Video_Televisions?hash=item35a63bd205

    Graham & Jean
     
  20. hilldweller

    hilldweller Funster Life Member

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    Doesn't look high to me, that's a really good spec.
     
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