Ours was upgraded to the MS2012 because of the issues with the GFI. It should help extend the life of the fridge and other electronics according to the info I got from Magnum. Also, no more GFI issues. I don't think going bigger would help too much, at least with the stock battery bank. It will run the stuff we need it to. Going bigger without need will use a little more battery power.
Mike
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Vicki and Mike, Aria 3901- The Wined Up Bus, towing 16 Jeep JKUR.
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