Hello vw lovers I finally bought my first one and I love her. I'm trying to figure out how to get the fridge and sink working? She is 72/71 campmobile. Her electric hook up works but she has no leisure battery. Contemplating getting one but have been advised it's expensive so I'm wondering can I get water and sink to work without battery and also the fridge. The fridge seems to be more like a container made from Styrofoam how can this work? If any oft can help please drop me a line. Many thanks Kiki