Battery & fridge box

Provided the towing vehicle is capable of handling the weight, but before you even consider the design etc. have a look at the threads regarding caravan weights & loading, and the disaster/s that can occur if the van starts to get a mind of it's own.

Personally, I wouldn't. I'd find some other place to locate the fridge, like in the rear of your towing vehicle.

My Engel fridge is on a slide in the back of my Hilux, works very well and doesn't effect the van.

I hope this helps, but no doubt others with a greater knowledge of vans will respond.

When you are turning/backing, I doubt if the car will "bounce" off the box.
More likely it will just crunch up both until you stop.
However, if the box is big enough to hit in the first place it is not a good idea.
Nearly all that extra weight has to be taken as ball weight, is this a good idea?
An AGM battery can be placed anywhere suitable in the van for balance and trim reasons and doesn't have to go on the drawbar. Lots of vans have batteries under the bed for example.
Kimberley Kampers have big boxes on their draw bars and one man and all his mates can't lift the draw bar.

The performance of the fridge in a box will be worse and it will use more power each day.
In a vehicle the fridge can be vented and it can also be vented if used in the van.
You didn't say how big the fridge is so hard to go further not knowing type of vehicle etc.

Tim, I'm not much of a maths guru,but it appears to me you would be adding more
than the legal weight limit on the ball with the fridge, box & battery set up...let
alone the van weight. Not a lot of upside anyway...much better to carry in car...
security, ventilation, dust, damage, temperature, onroad access, extra wiring etc. More convenient for day trips without van...........oldbaz.

Tim,

Go to this site:

http://caravanersforum.com

It is a caravan forum, it's easy to join, no cost, all you need to do is register. Because the site is pretty well devoted to caravanning there's a whole lot of people on there who an techo/mechanical, and will be able to give you very good advice, plus probably do your sums for you in working things out.

Give it a try.

Dick