I think the charging systems know this and take things into accountGreat stuff. I've had the P300SE for about a week now. So have got to grips with the charging (my first phev) etc. One thing that I hadn't realised straight away was that you shouldn't charge to 100% as most battery degradation occurs between 80-100%. So ideally you want to charge little and often between 15-75% charge if that makes sense. As the battery will then perform better for longer. Of course, when you need the full 34 mile leccy range, then by all means charge to 100%.