Apologies for the thread necro' (I thought it better to add to this rather than start a new thread)
With regard to trickle charging the ES, is there any way to have the car all locked and shut up and still have it charging on a driveway, or would the boot have to left ajar?
edit....Would there be any adverse effects on disconnecting the battery?
I am occasionally away for a month, hence why I'm asking