ChrisMiller
Well-known member
Having just read the technical highlights document (linked elsewhere on this site), it appears that charging the battery from the engine is similar to using the fast chargers found (in the UK) at motorway services, in that it won't recharge beyond 86%. I can think of reasons to justify this behaviour to do with the amount of heat generated by high-power charging as the battery gets close to full - but since they're based on hazy recollections of A-level physics from 40 years ago, they may well be completely wrong (as may be my technical understanding).