ratfink09 wrote:
Would I have any problem with the alternator on our E-450 chassis keeping up with charging the chassis and house batteries while driving?
First off I'd go with the bigger battery.
As far as your alternator goes, it depends on the wiring to house batteries and how far you drive. In my case I've seen the solar panels work away at (charge) my batteries after driving for several hours.
My suggestion would be to find a way to maintain your batteries once you get home to ensure they're fully charged at that time, and stay fully charged. Solar, trickle charger, etc. I think a good deal of RV battery trouble comes from batteries put away in discharged state or allowed to draw down for months (parasitic loads) without maintenance.