I personally don’t see the point in these but Jackery, specifically, is killing it with their social media marketing. This is little more than some lithium batteries, an inverter, and a solar controller. I had a buddy making these back around the year 2000 but with Lead Acid batteries.
Your RV already has one or more batteries. I’d much rather spend the same amount of money and upgrade my RV’s battery bank system and add an inverter than I would be to introduce yet another device that I have to worry about keeping charged.
The only benefit that I see is that this gives you something for use at a stick and brick house and the RV. But if it’s just solely for the RV- upgrade your existing setup and don’t worry about bringing more pieces into the mix.
Lithium Battery Upgrade: