Well after reading a bit on-line, it seems that they have a business model running a bit differently:
- they "almost give-out" the charging station to terrain owner (owner of highway shop/gaz-station, etc.)
- the owner only has to supply electricity (and as said electricity is cheap)
- in exchange, the owner gets an increased traffic in the shop/restraurant
(people, who have 10 to 30 minute to kill until full charge and buy food/drinks).
In that context, it's in the land owner's best interest to have a open technology in the charging stations:
- the more open the standard, the more different drivers can stop to charge, and thus the more customers.
And Tesla in turn has a small advantage too:
- the more shop/restaurant along the highway are likely to rent such stations, the more charging spots there are going to be overall, and the less potential customer will be afraid by range problems.
- thus market for eletrical vehicle increase (of which Tesla has a substantial mind-share, and produce the longest-range vehicle)
- thus market for car lithium batteries increase (a field where Tesla is leading, to the point that some people want to persuade them to drop the Model S and concentrate entirely on batteries for other companies).
Or to put it differently: all this charger will need batteries to charge, and Tesla is apparently the best game in town for batteries.
(It would be as if Sanyo started to provide "free charging station" around in a country where Enloop have the strongest market penetrance)