This is a sill post saying positive most phev cars have 7 kw minimum which means they charge to full in a little over an hour.. I am not worried though as my local Tesco will still be free anyway as you only get 50 minutes free from arming after that you have to spend £5 and only get a max of 2 hours before getting hit with a £80 fine. So bays are always free, the manager has assured me due to the managed parking they will always be free.