New polar cub Mach 8 AC and the Honda eu2000i question

If your convertor is putting out 55A at 12V, that's 660W on the DC side. If the AC side is 950W, that's a low efficiency of 69.5%. I question the 950 number. Did you see this in a spec sheet? Measure it?
The 290W difference would be dissipated as heat if the efficiency is really so low.

If I set the stat too low, my Polar Cub will ice up and stop cooling.