I've had 3 compatible battery charge sources: solar, alternator and gen/charger while driving. No problems. And shore plus solar is SOP.
The typical idiot tank level sensors only serve one purpose: The salesman tells you what a great monitor system you have. My fresh water one is reasonable.
The ideal wine tempeature is 57F and it's not a refer.
MW will be fine. But be aware that they can draw 150A DC so the typical few minutes of use is best. But be aware that at those draws proper wiring is critical - ie short and big.
