I'm using a Chinese knockoff of the Renogy 120 watt portable -- it is wonderful. I have a Honda 2000 and hate using it, even though it is quiet -- I like silence!
The advantage of the portable is that we park our trailer in the shade. The cord allows me to find a sunnier patch for the panel.
I upgraded the cord to 25 feet of ten gauge wire, but otherwise this is the stock unit. I bought it from a private party, someone else here on this forum -- he wanted more power.
We are minimal power users -- LED lights, no television, etc. We have two group 31 batteries at 110 amp hours each. The panel kept the batteries topped off for days on end, even in the winter.
My only regret is that I did not do this sooner.