http://myimiev.com/forum/viewtopic.php?f=14&t=533
At one point or another, many of us have thought about direct solar charging (myself definitely included :lol: ). You would need a target voltage of 350-360 volts to be able to charge.
The downside is that if you attempt to tap the high voltage bus, the car must either be in READY mode or actively charging from either the J1772 or CHAdeMO port. When the car is off and not charging, the HV bus is not connected to the battery, and thus no voltage present.
You may also find that even if you manage to get something working through the CHAdeMO port, the car's vampire draw is around 250-300 watts.
There are easier places to connect to than at the AC compressor (not to mention the unknown effect of backfeeding power from something the car measures and expects to consume power).
You'd likely be better served by buying a pair of Enphase M250 micro-inverters and sending the power into your house. Or, using the panels with a smaller 36 or 48 volt battery bank and using a power inverter to charge the car through the J1772 port. I suppose another option is to have a parallel battery pack in the car that the solar charges, but dealing with the massive current when two lithium packs at different charge levels are connected becomes quite a feat.
I've been in your position, but knowing what I know now about the car, the i-MiEV doesn't lend itself well to direct solar charging. Maybe someday, someone here will figure out how to directly charge the battery without waking up the entire car, at which point your idea becomes feasible (with the car's idle load, one panel's entire output goes to keeping the car awake).