I pretty sure a 3K will run it. I seem to remember them telling me 2800 w generator was required. I thought about it until I found how poorly the Starcool ran off shorepower; it works much better when the stock AC and engine is running with it. YMMV
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2006 Ford 6.0PSD EB-50/E-PH SMB 4X4 Rock Crawler Trailer