The Yamaha 2400 will run the AC but I've not tried at altitude. My guess is that it still will if you let the AC cap charge a few seconds before going to AC from fan. It's fairly bulky and I store it in the TM's hall strapped down during xport. It's quiet and starts first pull, when I remember to turn the ignition switch on. It's way over kill for just the batteries and we haven't bothered with a micro. We have a 12V hairdryer for the wife. It just idles when charging batts.
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