Can somone help me with a project I have at work??

[crossfire2k5 10+ year member]

Ok, I work for a handicapped mobility company and we are converting a Dodge sprinter for a disabled man and his wife, he is getting a power rotating seat base, lift, in dash NAV, amp, speakers, and some other stuff. He also wants us to convert the van into an RV of some sort. mini fridge, microwave, lights ect. He wants us to add two extra batteries. My question is should i use an battery isolator of some sort or a battery integrator? here is my current idea:

I have sourced a 200amp alternator for this van. I use a 3 battery isolator system, 1 starting battery and 2 aux batteries. Also I would like to add an additional charger for the two aux batteries for when the engine is not running (if he's at a campground ect). Then hook up a dc to ac converter to the batteries to run the fridge ect. Does that sound ok? Would I run into a problem if the customer had the van running and had the charger plugged in? Any thoughts on my idea?

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[helotaxi 5,000+ posts]

Have you tried asking on RV forums? This kind of thing is right up their alley. It's gonna take one hell of an inverter to power a microwave BTW. 2 batteries may not be enough reserve capacity. You might be looking at 5-6.