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Is there something extra needed for 240V?
I think you will find the VAST majority of public charging to be 208V or one leg of three phase power. This combined with the fact that most stations are limited to 30 amps we have an effective charge rate of 6kw. This is SLOW when on a trip.
Is it easy (cost effective) for commercial sites to convert to 240V?
Our office connection to Ottawa Hydro is 600V, 200A, 3-phase.
Because resistance heating elements are more efficient using 3 phase. Maybe true or not(?).
There is also 480V three phase (which is what industry in the US uses) It is the same configuration but with 480V between legs, and 277V from a leg to neutral.
Question for the electricians: I've got 120v/208v power at my house. What would I need to transform the 208v line feeding my NEMA 14-50 up to 240v? Since I'm limited to 40A continuous, I might be willing to buy the 15% upgrade if the price isn't too steep.
Question for the electricians: I've got 120v/208v power at my house. What would I need to transform the 208v line feeding my NEMA 14-50 up to 240v? Since I'm limited to 40A continuous, I might be willing to buy the 15% upgrade if the price isn't too steep.
In theory, if you could find a 208 to 240 volt transformer with the proper capacity rating, you could step your 208 volts up to 240. HOWEVER, since you are limited to pulling 40 amps from your 208 volt circuit, you would only be able to realize about 35 amps continuous (minus any transformer losses) on the high (240 volt) side, meaning that you're still delivering the same amount of POWER to the car. There's no free lunch. (Power (watts) = Voltage (volts) * Current (amps))