The single charger is rated at 10 kW. This led to a question on the forums about whether it might be able to draw more than 40A if it were available. For example, would it draw 50A from a 200V source? Well, the not-terribly-surprising answer is no. We have a visiting Model S out back right now, plugged into our CS-90. The car has a single charger, and the voltage being delivered is 204V (we have three phase source here, nominally 208V). Despite the lower voltage, the maximum current you can dial in is 40A. So it is getting 8 kW.