For those interested in how my solar and battery mods worked out in a test.
We have the 2022 25FKBS. I added two 200w solar panels, changed the battery to a 460ah lithium, and upgraded the converter to charge it better. So we should have 590w of solar, with the one panel that was already on it.
The reason for all that is because our camping will be almost totally boondocking.
So I turned on the fridge (12v), turned on every light on the rig, inside and out, turned on the inverter, plugged a fan into an outlet. I had all that running continuously for 3 days and nights. Never did the battery get less than 45%, and that was only in the morning after running all night, and after the second night. During the day it charged back up to be almost 90%.
It seems that we could boondock pretty much indefinitely as far as the battery goes. I don't even really see us using as much power as we did in this test, as we won't have all the lights on all the time.
Two of the days were very sunny, one was cloudy.