We are very conservative in our power usage when boon docking (almost all of the time). LED lights, parasitic usage, sometimes plug in the laptop, maybe nightly heater usage (about 3.5A draw). About 200AH of battery. Need to charge every few days. 17' TT. Got tired of carrying around a generator so added 200W of solar - during high charge time around noon in the summer it's about 9A of charging.
Solar has no problem recharging normal loads by about 2PM the next afternoon without using a generator. If I go to an area that might have a lot of shade, and am there for more than 3 days, I still drag along the generator.
Now to add solar to our new to us 35' Toy Hauler. Even though it has a built-in generator, want to charge while we are away from the trailer during the day without running the generator.