Not sure what you mean by a Combi-TV ? - Do you mean a TV that also features an optical disc player, or a 12VDC/240VAC unit ?
I dropped on lucky by having been donated an unbranded 19’’ portable TV for the kids. I actually found it in the boot of my car one morning and thought one of my work colleagues had put it there as a joke as they know I generally have a dislike for unbranded, or to put it more correctly, generic electrical goods.
However, after astablishing that my wife had loaded it in the car because she was to polite to refuse the offer from her sister, just before dropping it in the black wheelie bin, having recently taken delivery of our new caravan I couldn’t help but notice that the accompanying 240V AC adaptor had an output of 12VDC. After a quick trip to Maplins (no longer of course !), I was equipped with a 12VDC Jack plug, a cigarette lighter style plug and a meter of suitably rated twin cable.
This then became our caravan TV. Even when we have an EHU (which so far has been every single outing), we still power the TV by plugging it into the 12V cigarette lighter style connector in the front binnacle. Of course, this would also work if we were to be off grid, helped along nicely by our van’s roof mounted 100W solar panel especially since the older generation (pre-LED) TV’s consume more power than the latest models.
If you do just buy a 22’’ Smart TV, the chances are it would take a direct 240VAC input, or it would have an accompanying power supply with an output of 18 or 19.5V DC. No good for off grid. I know this because in the interest of upgrading from this generic, yet perfectly functional set, I visited a few branches of everyone’s favourite electrical retailer, checking the back of all of the possible contenders, and examining their accompanying power supplies. A few strange looks and whenever the sales guys came over, I explained what I was checking but of course they had no idea what I was talking about
You could opt for a dedicated camping/caravanning TV which is marketed as taking a 12VDC input, but I find that in general they’re extremely overpriced for no justifiable reason for what again generally tend to be generic sets rather than premium branded ones.
Just in case it may be of interest, here
’s a link to a previous post of mine which details the make and model of the TV. It will surely be obsolete now, but maybe you can find something similar.
If you won’t be needing to use the TV off grid, and lets face it, I haven’t, despite being somewhat proud of my effort, then of course any mains powered unit will do, provided it fits the allocated space and mounting arrangement in your new caravan.
Best of luck, hope this helps, and let us know how you get on.