Charging @ 6.6kw...

Yes, that's what my father charges his with at home (30amp Clipper Creek) and that sounds like what he gets.

Consider that the Model S typically uses something like 300Wh/mile, so 6.6Kw would refill at about 22mph.

 

Is the Chargepoint station free? If not, does he even need to charge there? No point in keeping the Model S topped off all the time if he's only using 40-60 miles per day. Better to charge at home overnight and set the charge threshold to something like 70% or so.

That's one thing I really envy with the larger capacity packs. Charging is in no way inconvenient for me, but I still generally plug in twice a day. With a Model S I'd only plug in once every week or two!

 

If you really want 6.6kW charging on your Volt, you can install a Brusa. It acts as a secondary charger, basically doubling charge rate. There are over a dozen (2011 - 2012) Leaf owners that have done so. There's even a 2014 Rav4-EV that has bumped up his charging to 10kW !!! Are you up to the challenge?

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Speaking of 10kW charging - how do you know the Chargepoint is only 6.6kW's ??
Many of 'em around our area charge @ 10kW's.
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Check the numbers people post on plugshare - every Chargepoint station I've visited in the Midwest is a 6kW (208/30a) or 7kW station (240/30a). 6.6kW isn't too bad (you get like 22mi/hr charge off them) but the 6kW (18mi/hr) stations are painfully slow in comparison.

 

AHH ... no wonder! Now I see why you think 6kW is Chargepoint's max . . . . you're relating charging to the CAR .... not the capacity of the Chargepoint EVSE. But take a look at Chargepoint's web page. There, you'll find Chargepoint advertising kW levels they charge at ... at least at MANY stations. I know Chargepoint DOES make some cheep model EVSE's used at Wallgreens, Walmarts, and other low end locations. Most of those 6.6kW use 3phase power, broken down to 208 single phase (32amps). Double headed units will throttle down if/when multiple cars hook up too. And even the faster charging cars on Chargepoint will throttle down, once they past a threshold somewhere at or above the 80% fill line.

EV Models - ChargePoint

There you will find that it shows ALL cars capable of drawing 10kW's can draw 10kW's ... meaning the RAV4-EV - the 2 Tesla models - and The Mercedes. Similarly, the multiple cars that can "only charge" @ a max of 7.2kW's can only draw 7.2kW's. I even see the Audi A3 is listed. So it can use 8.3kW's at Chargepoint stations. It's just a function of the owners' cars, not a limit of the Chargepoint station. Now - what I'm curious to find out is how much ABOVE 10kW's a Chargepoint can deliver ... after all, SOME Model S's have dual chargers. There are chintzy ones, but SAE & ULR show the top end J1772 plug has a max delivery rating of 16.8kW's !!!
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That page at ChargePoint's website is simply promoting various EV models and describing the car's capability. ChargePoint themselves has never made a Level 2 AC charging station capable of more than 30A or 7.2 kW per charge cord. You can see this by looking at their products page and their legacy model page and viewing the data spec sheets.

 

Any ChargePoint station capable of more than 30A or 7.2 kW (30A x 240v) is actually manufactured by another EVSE company who has then licensed ChargePoint's Internet-based authentication and billing system support. The Level 2 AC stations manufactured and sold by ChargePoint themselves are all limited to 7.2 kW AC.

 

The 2014 RAV4 EV comes from the factory with up to 10kW charge rate capability since it uses the same basic charger unit as the Model S.

Toyota RAV4 EV - Wikipedia, the free encyclopedia

 

OH !! I see - I was going to say, I'd used 10kW Chargepoints in Europe - and the EV driver even had to provide the cord! NO wonder they looked different from those at our U.S. company property. With more & more plugins using higher charge rates - I wonder how long it's going to take Chargepoint to manufacture their own, rather than outsourcing.
Thx!