Using a 240v TV from 12v supply
21 replies
replied on 11/04/2017 18:38
Alan and Nicky replied on 11/04/2017 18:41
Navigateur replied on 11/04/2017 18:53
replied on 11/04/2017 19:00
Posted on 11/04/2017 19:00
Others can advise better than I can. Personally I would not wish to purchase an inverter to run the TV as there are inefficiencies in the conversion and I doubt that a suitable one is that cheap.
Somebody else can advise further I have no doubt. My solution would be not to watch TV
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young thomas replied on 11/04/2017 19:08
Posted on 11/04/2017 19:08
i guesshe's not looking to 'invert' from 'no mains' to 'mains' to ise this tv on 230v, rather to try and get the existing tv to run on 12v...
this can be don as many tvs are down rated to 12v via an external pack (you will know if you have one of these) or internally, where a tv engineer might be able to assist for a small fee.
replied on 11/04/2017 20:10
hitchglitch replied on 11/04/2017 21:31
Posted on 11/04/2017 21:31
People go to extraordinary lengths just to watch TV when they are away and have no mains supply. Your TV is designed to run on mains and there is no simple way to make it run on 12 volts dc.
So, you can buy a 12 volt TV. It's a lot more expensive than a mains TV and uses quite a lot of power so then you start to think about solar panels etc. to keep your battery topped up.
Life is far simpler without the entertainment system. Without mains your battery will last a long, long time just running LED lights (to read a book at night perhaps?) or to flush the toilet, ignite the fridge.
Still, given that I am anti-TV when away you can ignore me completely. Also, it's so much more fun to have a challenge and fit lots of gadgets. How about a satellite dish?
EmilysDad replied on 11/04/2017 22:36
Posted on 11/04/2017 20:10 byTo run from 12v the TV it will need a stabilised 12v supply which I suspect is built into the TV but designed to be fed from a 230v supply. Powering the TV directly from the vans 12v un-stabilised supply is therefore not an option. Assuming the TV is a flat screen LED it will not require a vast amount of power so one option is to put is an inverter but the cost could be quite high just to run a TV. A simple and probably less expensive option would be to get a 12v TV.
replied on 12/04/2017 07:02
Posted on 11/04/2017 22:36 by EmilysDadOur 12 volt telly (came originally with a 240 volt AC / 12 volt D.C. transformer) & has been used successfully on sites with & without EHU. The battery itself will smooth the 12 volt supply enough.
hitchglitch replied on 12/04/2017 07:58
Posted on 12/04/2017 07:58
The dc supply on EHU will be a maximum of around 13.7 volts and the van battery will provide smoothing. Without EHU the battery voltage will be 12.7 volts max., dropping to, say, 12.3 volts at lowest. So actually the dc voltage is within a reasonable operating range. Van chargers are deliberately designed to produce a voltage that will keep the battery topped up (but not properly recharged unless they are smart chargers) and provide a dc voltage within a reasonable operating range that most dc appliances will tolerate.
The question is whether for the particular TV this range of voltages is acceptable and, more important, is there an internal transformer/rectifier to 12v dc that you can actually get at and connect to.
Alan and Nicky
Caravanner from Lancashire