Worth it depends on you and how you RV.
I personally would not be without solar, but it would be more than a single panel.
I would suspect based on the type of panel and your question it is likely not worth replacing it in your case. I do not know how that one is wired, but at best it is likely the equivalent a trickle charger.
2016 Chevy 3500 DRW, crew cab (Soon to be 2014 Volvo 630).
2016 Fuzion 325T
675ah AGM, MSH 3012 inverter, 960w Solar.