I have used the cars charger Scheduler and calendar to charge my Zoe ZE40 using off-peak electricity for some time without any problem. However , for a few weeks I have found that the charger will start at the correct time but fails to stop at the set time and continues on charging until it is 100% This is very frustrating. and of course is not good for the battery. Has anyone else had this problem and found a fix or got any ideas on how to solve the problem please