Hello hope you can help me further, have bought us a new caravan. As long as he is attached to the car I have 12v in the caravan unfortunately he has no battery where he could store electricity. In our old hobby we had the problem with a battery (front in the storage compartment) at the a current converter on 230v and from this to the cee can (hope the so called) so we had electricity for about 2 nights. The battery we had always charged at home because of the caravan no electricity from the Car gotm. So history passed now to my questions 1. How or where do I have to build the batteries between so that they are charged over the car while driving. 2. Is it now because they are connected in the net from the caravan again possible to feed with a converter 230v. already many thanks for reply