My bus has been standing for a while but I usually start it monthly and run it for 45 minutes to an hour, moving it around to reposition the tyres. However, the two reletively new 12volt batteries were found to be flat recently, and I'd always used the battery isolator. What I failed to realise was that the tacho is wired seperately and does not pass through the isolator, so the batteries had very slowly discharged. Not had a bus with a tacho before so did not give this any consideration. I've now disconected the tacho as the bus is for private use only.

Thanks for the above replies.

John.

My bus number (if any): RM108