At best, you might get 5 amps under ideal conditions with a single 100 watt solar panel.
Please scroll down this page to see typical specifications for a 100 watt solar panel:
https://richsolar.com/collections/solar-panels/products/100-watt-solar-panelAlso note its voltage specification.
Another concern might be the campers shore power converter.
I see that the Progressive Dynamics 4000 series includes a switch to charge either lead acid or lithium batteries:
https://www.progressivedyn.com/rv/power-centers/inteli-power-4000-series/