[Astro]

I just thought of another advantage if it was possible to fit an inverter type A/C.
Because it is totally separate to the controller and motor you don't need to have included it in the original design. It could be retrofitted to an existing set up.
Especially for those that have fitted a single ended shaft motor.
I imagine the existing vehicle A/C evaporator and blower could be re-used but the expansion valve would have to be changed to a reverse cycle type expansion valve (works in both directions). So really you would only need the outdoor unit as long as it didn't rely too much on the electronics of the indoor unit.
I had better stop derailing David's thread. I will investigate this further and if i have more information to share i will start a new thread.