Originally Posted by moose
Great, I'm planning dual alternators as well but possibly more lithium storage. For A/C I think 400Ah is more like 3-4 hours instead of 8 hours. It depends on the outside temperature though and running at night will take less energy. I'm looking at DC-based A/C units with variable motors so they aren't cycling all the time wasting energy. As far as EarthRoamer goes, I believe I read that they are using typical window units as most campers do in a box with a vent to the outside.
that is what I have decided... I Portable 9,000btu AC inside the van. It needs 1/2 the power of a 9,000BTU roof top A/c/
I just ordered the dual alternator today. I will keep you all up to speed on this. The system will cost $9,500. A lot.
About $6,000 more than an Onan with roof top A/C and instal, but no loud generator and a lot less weight, much cleaner and simple. When your Onan has a problem, it is harder to find someone to fix it too. And the roof top A/C is ugly and when off road has that much more of a chance to get hit by branches. We will be doing two vans as one is for a film crew.
The vans will also have the new Yamaha 2000 portable generators as back up.