So far, I have found that a cloudy or rainy day will really drain the batteries. I can put 6 panels (600w) to my controller and I may just add some this summer. My preferred investment would be to upgrade the batteries to Battleborn Lithium. I could get twice the usable amp hours for 1/3 of the weight. Downside is they suck in freezing temps. They literally can't be charged in 32 degrees or colder. Unfortunately some of our travels start in sub zero so it won't work well for us. AL off this being done, we haven't dry camped ever! I just like to keep everything topped up when driving or when storing.
2017 GMC 3500HD Denali DRW pulling a
2018 RW3901MB, Disc Brakes, Dual ACs, Auto Sat Dish,
Stack W/D, 5500 Onan, Andersen Ultimate Hitch, 400 Watts of Solar fun!