I could not find that charger with the 7.7KW output on the web site. I am not sure if they still have some bugs they are working out or if this just hasn't made the web site.
The Focus has a 23kwh battery and theoretically a 7.7 kw charger would bring it up in 3 hours. That isn't horrible but you need to find 40-50a at 240v. If I wanted to really be "portable" I think I would make up some adapter cables for a bunch of different receptacles and pack a long power cord.
