Current Affairs!

The smaller fridge in my last caravan drew about 10 amps so that's 120 watts ... no idea what a flat battery will draw though but even if it drew the same as the fridge, then that would still leave around 100 watts to play with. Nothing like the 350 watts max that VAG suggest as a max.

How about a couple of frozen bottles of milk for the fridge and don’t switch it ob whilst hitched that will keep the fridge cool and cut the power drain

I have an old caravan maintenance guide which lists caravan battery charging current as 8amp to two amps and indicates a 1 amp fuse on the fridge connection! When on tow fridges are hardly functioning and we usually pack the freezer and fridge with freeze blocks if there is a need to keep food cool while we travel. I really don't know what a flat battery would draw tbh, but I would be surprised if it was much higher that 8 amps. I will check my fuse block when next I have access to it, just out of curiosity.

I tend to agree with MM and I am pretty sure that modern electrics are so fused to prevent overload.

Most fridges I've come across have at least 100w elements. If already down to temperature before setting off, it will not be pulling power all the time though.

1 amp fridge fuse? Perhaps for the control circuit?