Thanks Barry for that very helpful reply to the question I asked and the additional info re the Schaudt charger charging the engine battery when my van is hooked up. I had proof that this was not happening across my first winter and was told by my suppliers’ electrician that being hooked-up only charged the leisure battery. I was hooked-up to power a low wattage fan heater and had noticed that the engine battery seemed more weak than I expected in cold weather and no run out for 2 weeks. (Please remember that I bought my van new and it was the first winter, therefore, for its engine battery.) Unless my van is configured differently from yours I should be able to find a blown fuse. I would be pleased not to have to connect up my CTEK charger – it does a good job (I think) because it keeps the voltage constant at 13v – because it will make it easier to hop in and drive off!
Best wishes,
Keith.