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Discussion Starter #1
The Opel version will use 220V for a charge time that is less than 1/2 of the charge time for the U.S. version at 110V. I would install a 220V line with code required NEMA 6R-20 sockets in my garage to cut the charging time. I hope that the circuitry is designed accordingly, so we can just get an optional cord with the 220V plug instead of the 110V plug.
 

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This has been discussed before and I believe that Lyle has confirmed that the US version will be able to accept 110 or 220 volt.
 

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The projected times to recharge

The projected times to recharge shoulb be 3 hours at 220V and 6 hours at 110V:

If your electric circuit is 15 amperes and the voltage is 110V, then the GM charger should be around 12 amperes (to avoid the breaker to open).
So, 110V * 12amps = 1320 W-h or 1.32 kW-h
Then, to recharge 8 kW-h, the time needed will be 8000/1320 = 6.06 hours
 

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Charge times.

Assuming 15% battery loss, 95% electronics efficiency, and battery fast charge capability for 8 kWHr:
Standard 115V wall socket @15A: 6hrs
Special 115V plug @20A: 4.2 hrs
220 V @20A: 2.2hrs
Three phase 220 V @20A: 1.3 hrs.
Industrial three phase 440 V @20A: 38 min.
EEStor to onboard EEStor: 1 min
 

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Discussion Starter #7
220V for faster charging

Tom:
Thanks! If one were to use a 220V 1 phase line with NEMA 6R-30 sockets (-.- plug configuration), I can cut charging time down to 2.2 hrs!
3 phase would be even better, but I don't know if the proprietary plug that GM would provide is capable of that. I guess that would require a twist lock connector like a L14: http://www.elect-spec.com/nema_twist.pdf.
Does anyone know whether 220V 3 phase has been previously mentioned?
 
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