Ok so I went away in my van last week and I still havent got around to making a hole in the side of the van for the fridge flue. I will get around to it but it did get me thinking.....I go away and connect the van to hook up. The RM122 is a two way fridge (gas and 12v) so I was wondering can you somehow get a converter to convert 240v to 12v or a CTEK charger to charge the leisure battery whilst the fridge is drawing from the leisure battery. I know the electrical genius' on here will be going 'you bloody idiot of course you can!' so please enlighten me. I want to do it safely and simply. Thanks
@woollywelshbloke, you're bang on. Your best bet is a Ctek style charger wired directly to your leisure battery. The fridge feed then comes off the battery to your fridge. Very simply put. You will need to find out what your fridge draws (amps) and select your wiring, fuses to protect that wiring and battery charger to suit. i.e, if the RM122 draws 7 amps (it won't be far off this as they are power hungry) then if you can afford it go for a 10 amp charger. This will give you that little extra for lighting, accessories and radio during the evening etc. Use minimum 2 mmsq (2.5 or 3 would be better) wiring for the battery to fridge connections and protect the wiring with a 10-15amp fuse on the live. The ctek mxs 10 is the kiddie in this example as you can also use it as a power supply (constant 13.6v) when hooked up. The Ctek will also keep your battery tip-top when at home and they come with clips as well as ring terminals so you can also top up and condition your starter battery. If your fridge draws 5amps, go for the 7amp charger.... There are caravan power supplies available that output a constant voltage and 12 or 20 amps. These will work but will not look after your battery banks as safely or efficiently as the Ctek range. They are cheaper but you will need to manage how you use them so you don't gas and wreck the battery.
But... make sure there's a thermostat on the 12V section or it'll freeze solid. 12v is usually only for travelling. Well it is on my 3 way.
