I do not understand why such a car has such a battery failure, if left standing for a week or two, or in my case in a hospital car park with the radio on for 40 minutes. RAC called and sorted. Battery tested by RAC and good. The least should be a warning on dash OR maybe an sms or email from the cars system. 1300 pages of manual and no comment, I can find. Odd at best. This is not explainable or needing owners to obtain a solar charger. It is a design fault.