Power for fridge, lights etc, is from 2 x 110AH Gel batteries
charged by a Xantrex TC40i 40 Amp charger and a Redarc BCDC25 Solar regulator. Charged from the car alternator while driving, solar when camped, and 240v charger when mains power is available.
For a schematic of the trailer electrics, go to the electrical schematic
I am in the process of fitting Anderson 30A Powerpole connectors for all 12v supply inside the trailer, to replace the cigarette lighter style. The sockets on the exterior will remain, as there are no suitable weatherproof Powerpole connectors that I have found.