solar question

Recently bought a used truck camper. It will have solar panels on it. Batteries are going to cost more than the panels. I operate on the "thumb rule" of 100W of solar panel for each 100AH of usable battery (or 200ah rated). Just going with Harbor Freight's new 100W panel. Hard to beat the price. $100 less 20% employee discount. The first panel was bought on sale PLUS the 20% discount which brought it down to about $70 or so (can't remember exactly). Unfortunately they only had one in the store and the sale ended before anymore were shipped in. For my use, the solar panels will be powering a small AC refrigerator during the day (on a timer so it shuts down at night). And keeping the batteries up. The truck/camper combo will be a daily driver and used for work shifts that end at midnight (or later) and the next shift is at 7:30AM or when the roads are too icy to risk driving in the wee hours. So the truck/camper will be under parking lot lights most nights. Plus it is to haul the dog around during the day so she's not left home alone. Solar battery chargers (the most accurate description of "solar" power systems) are not a good fit for everyone, despite what many proponents claim. The truck will eventually have 4 (6V 215AH GC-2) batteries plus 4 (100Watt) solar panels. For the stated use, solar will likely be a good fit.

https://www.harborfreight.com/100-watt-monocrystalline-solar-panel-57325.html