We do manage to keep the fridge going and batteries around 70 to 75 per cent through the night, with good conditions, and miserly power useage for uses other than our 12v truck fridge. We also have to use a 100 watt "portable" to add to the production of the 200 watts of fixed solar. And, in less than ideal conditions, I chase the sun around the path with that panel. Even then, in low sun, crummy days, we will have to kick in a half hour with the honda 1000, sometimes both morning and night, if it's raining, especially if we have to use the power greedy furnace fan.
Unlike many, we have very limited power needs. No electrical cooking or heating gear. No keurig. No induction hot plate. No microwave. Led lights even seldom get used. We charge phones during the day, and often from the truck while driving. No laptops. No tv. Not a lot of streaming on our phones. A couple years ago, we chased down phantom draws on the power, and we're pretty much down to the essentials-- which are mostly monitors and the charger/converter.
We use a cooler with ice for beverages. I'm very conscious of where everything is loaded in the fridge, and how many times I open the fridge door each day, spilling cold air.
No inverter, either. We used to have one, but with only 2 group 27 batteries, and the very limited storage, that just doesn't make sense. We removed it.
I wouldn't necessarily recommend our minimal setup for new campers. It requires a lot of monitoring, (and, a good monitor) and discipline. We're ok with that, but it was our choice. And, we're used to it. We're solar powered by choice, since 2008, and almost never camp with hookups. Power misers by choice.
And, we both love the new truck fridge, danfoss/ secop compressor, indel product. Quiet, efficient, even cooling, even a bit more capacity than our old Dometic. No orange lights from the panel at night. 🙃
That said, we've already purchased new solar panels to double our fixed panel production. I would love to upgrade to lithium batteries, but it would be a waste right now when the agms are still working well. That's a someday in the future thing. If we find we actually need them.
Sherry