I'm considering taking the car on some slightly longer journeys this summer and don't want to be caught out in the middle of nowhere with a dead battery, so I ran out and purchased a Honda generator that can charge the car for four hours to get a few more miles out of it, if necessary.
I tried firing up the generator with a little gas and it didn't go into overload with the Zivan charger at the 60% (12 amp) setting. The generator puts out 1600 VA (technically 13.3 amps), but the charger has a power factor of 90, so 12amps/.9 is actually 13.3, which puts the generator at its rated capacity. I figure four hours of charging starting with the battery at 80% DOD will be acceptable for another 20-30 miles. I might also be able to pull off the freeway and find a plug-in at a gas station, but this would work anywhere.