I have seen 5 amps during a rain event from my 198 watts of solar, but on another rain event at high Noon there was not even enough light for my charge controller to turn on.
Lots of variables on this obviously and no hard numbers can be applied across all locations and all rain events as to what solar can or cannot provide during one.
I personally don't use any electricity to make coffee, or food, and am always a little surprised that those living on battery power choose to do so. Especially when they do not have enough charging sources to meet their needs most of the time.
The second my vehicle parks, the engine is off, I can't imagine idling to recharge, or run an engine at all to recharge, but again, that is a personal choice, and not one for everyone.
