I ran our refrigerator and freezer a few times a day through two power outages with that generator, so you are talking an apples to grapefruit comparison. I saved $400 in meat in the freezer with it.
I use the trailer 10 times a year, and use a generator no more than an hour a day on about half the days.
So, at about a gallon (maybe two) of gas a year I don't see buying any solar panels there.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears