Missed this thread, I never got the emails!
Yep, 6kw generator end on an 1800 RPM Liquid Cooled 3 Cylinder 1.0L Kubota D1005 engine
6kw isn't much, but the fuel usage is extremely low, and its prime rated. Has a 30 gallon fuel tank too so it can run for 60+ hours non stop without refueling