As charging at a gas station is always going to be more expensive than charging at home you don't want to be charging more than you need. It costs me about £6.50 to fully charge my car at home or as much as £54 at instavolt. No way I'm paying that much more unless I really need it.

If I'm charging only what I need at an ultra rapid charger that'll take between 5 minutes for 20% or 18 minutes for 70%, which is between 60 and 200 miles of additional range. 5 minutes is hardly enough time to nip to the toilet, 18 minutes is enough time to get some snacks and a coffee as well from the gas station.

Plus it'll only get faster from here.