Thanks for all the information, I have a BANNER conditioner, it's only a couple of years old, the majority of people seem to turn them off whilst they are away, I think I'll do the same.
When I had the Aero 8 I could just isolate the electrics with a switch when I was away and just trickle charge to keep it topped up ready for use, I don't want to go down disconnecting the battery route as it lives near the rear axle and takes some getting to!