I have a
Renogy suitcase 100 watt panel. I just got it this week and have been experimenting with it. I run a 120 AH AGM battery in my teardrop camper. And have a Ctek DC-DC charger also. The battery and Ctek were more than fine to supply the power we needed until we added a Snomaster fridge/freezer. Then we needed to add solar, mostly for when we spend more than one night in the same place.
I just started a test to day with the panel but probably wont get useful numbers because it is just to hot outside. I have the Snomaster in the garage and the lowest temps are over night at 90 degrees. Right now the garage is 104. I'll probably run some test in real camping situations because we don't camp when it's this hot.
The Ctek is also a solar controller to 20 amp so I can add another 100w panel if I need to.
You need to know what you power requirements are first. then you can figure what is needed for panels and batteries.
Todd