battery help

I'm totally new to caravan ownership, just bought a 2010, 16ft, 16.49-1HL. The van doesn't have a battery (so no battery monitor or battery switch) but does have a dometic fridge and Setec STII power supply. I'm keen to do the following, and would be grateful for any advice... - Add a battery...

Hello, I was hoping someone may be able to provide me with some advice or help on what could be the probable cause of my 12v power supply stopping working today in my Jayco Expanda 16.49-3. I have outlined all details below. My family and I are about to head off on a big trip in a couple of...