If I ever needed more electrical power in my Westy, the first thing I
would do is revise my electrical needs downwards. The wiff might veto that,
so I would probably opt for a 27 lbs Honda generator.  Really quiet, burns
almost nothing, doesn't add drag on the roof, and I can remove it for daily
driving. I think it beats the heck out of any multi-battery, solar powered,
setup.  I still might do a dual battery setup, but only if I swap the
Dometic for a Norcold, and the battery will be the absolute minimum for 16
hours of fridge use, probably half the size of what most people use.
    Any more than that, and I will be Dennis Haynes twin brother, towing my
Westy behind the 40 footer, diesel generator cranking out enough amps to
make frozen margaritas.

   John