[HawgRyder]

If I understand the test correctly...you are measuring the back flow in the diodes of the alt.
Sounds about right....diodes are low resistance one way....high resistance in reverse.
Alts are normally a 3 phase unit....meaning...you have 3 sets of diodes installed in 3 pairs (wired in series)...with the output connected to the joint in each pair.
This gives you a full wave rectifier network on each phase.
This also explains why sometimes you get a "whirring" noise from an alt...(heard in the radio)...one of the diodes may be leaking a bit.
And....a Solar charger might be OK....but would require the car to sit in full sun all day to charge....not the best for the paint job...LOL.
Bob