I think the takeaway is these are convenient battery packs with a built-in inverter to run 120 V appliances. Great if your tent camping for a couple of days or a picnic but not for RV use in my mind. Still need to charge these things as they don’t generate anything and they have very low capacity ( run down fast) The other Takeaway is they are extremely expensive for what you get.
I would change to lithium battery in your trailer .. 200 amp hours 2400 watts! can be had for 650 bucks 100 watts 1200 watts for $350 much more than thes portable stations and then add a panel or two more portable solar to the existing 190 watts you have . Then adjust your existing solar controller for lithium if you can ( higher charge rates ) and your small refrigerator ,coffee maker etc will do just fine.
.what I hate is some call these things solar generators many without any solar panels included and they aren’t. Deceptive marketing at best.
