Lspangler wrote:
Is there anyway to make an inexpensive inverter switch over to 12v automatically when 120 v is not available and back when it is?
..to my 2 6v GC batteries.
I don't understand the question. An expensive IC will detect shore power and pass that to the coach. Is that what you mean?
You're going to find that just 2 batteries will not likely run your Keurig for the whole 6 minutes. Get 2 more.
Harbor Freight stuff is notoriously questionable quality. Cheap out now and you may wish you'd gotten a pure sine inverter later.
Don Rowe site Inverter FAQ Inverters by Phredinverter threadMSW v. pure sineInverters and MW thread