The short answer is that J1772 is the default that is the easiest way for any 
commercial EV driver to charge.  That does require an EVSE, at least at some 
level.  If he was installing 220V service for L2, that would be the way to go.

If installing L1, the cars generally have some sort of adapter that plugs into 
110V.  A standard outlet could then be installed.  Weather proof housing, of 
course.

Tesla has available adapters for 220V 50A and 30A outlets, but I think that is 
rare with other EVs.

Mike


On January 21, 2016 5:58:38 PM MST, Mike Beem via EV <[email protected]> wrote:
>A friend who does electrical work in the North Bay here  stopped by
>yesterday asking an EV related question: 1 of his customers wants to be
>able to offer people with EV's a place to charge when they visit
>him--What
>does he need to supply and install? In some ways I am the wrong EV
>driver
>to ask about this, as I have only installed and used Levels 1 & 2 as I
>understand the classifications. When I was building my garage/shop in
>1999
>after starting my 1st full on conversion, I installed 2 new meters: 1
>grid
>tied to our PV installation, and 1 which only operates a 50 amp service
>for
>EV charging and occasional welding. I have never used any of the "new"
>EVSE
>installations, so don't have the necessary adaptors for my daily
>driver. My
>question is--are the new EV's people are driving able to use
>receptacles
>like the 14-50, or do they need one of the (expensive!) EVSE's in order
>to
>charge?
>Thank  you!!
>Michael B
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