Franksie wrote:Many thanks, I take it 3 1/2 hrs is the minimum charge time no matter what charger you use.
Well, no. The charger you're using, and more importantly, the voltage you're using, matters a lot.
The charger that comes with the car (Level 1, 110-120V) takes around 8 hours @ 12A and 12 hours @ 8A. I have never seen a Level 1 charger that can deliver 16A, because NEMA 5-15 sockets are limited to 15A (12A continuous, due to the 80% continuous current (longer than 3 hours) rule).
Level 2 charging is around 3-3.5 hours, depending on voltage. The car seems to draw a consistent 14-15A when it charges, but the power it's drawing depends on the voltage. Take 2 phases of 3 phase power, like in many commercial and large residential buildings, and feed them into the OBC, and you get ~208V RMS, and charging power of around 3 kW. Take the two hot phases of single phase power like you have in most houses to run ovens, dryers, stoves, and air conditioners, and you get ~240V RMS, and charging power of around 3.5 kW, and a slightly lower charge time. At 208V, charge time is typically around 3.5-4 hours, while at 240V, it's closer to 3-3.5 hours.
Or you can use CHAdeMO, which will top off the battery in about 20 minutes. You'd definitely need full 3 phase power for that to run the CHAdeMO charger, and you wouldn't want to use it too often either.