BMW introduces everyone to the ChargePoint network:
2012/02/28
2012/02/22
2012/02/17
So typical me - after joining the official BMW Active E
forum board: http://forum.bmwactivatethefuture.com/
And posting a reading a bit, I've done a bunch of research
on charging and have a few useful observations to share:
1) The BMW Active E is equipped with the new standard plug
for electrical vehicle charging in the U.S. (SAE J1772):
http://en.wikipedia.org/wiki/SAE_J1772/
2) For the size battery in the Active E (32Kwh lithium-ion),
a normal household electric circuit (110-volt/16-amp) will take 16-20 hours to
fully charge the battery (also called Level 1 charging in the J1772
standard). At Level 2 (240-volt/32-amp),
that's down to four to five hours.
3) The car's internal A/C current charging circuit will draw
a max of 32A at 240V according to BMW's specs, which means the Aerovironment
EVSE-RS unit is a pretty good match.... however:
a) Max realized current
on an A/C charging circuit is about 80% of the amperage.
b) The EVSE-RS is
rated 40A input, 30A output - so the car might not get the most it can draw.
c) There are other
cars on the market that can charge at higher rates (EX: Tesla @ 70A): http://www.teslamotors.com/goelectric/charging/j1772-mobile-connector/
As someone who is very going to purchase an electric
vehicle when this closed-end lease runs out, and it may have an even bigger
battery (like the Tesla S), and since I'm still not even sure when my Active E will be showing up, I think I'm going to do some more research before just going
with the Aerovironment EVSE-RS unit.
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