Can I get help with battery math...batteries-inverter-coffee

Why not just run the generator in the morning and run your keurig then? That way, you can make coffee and charge batteries at same time. From what I am hearing, people say 100 watt panel per battery. So the keurig may take a good jolt off your batteries and extend the time to get them back up during the day. Go ahead and run that genny in the morning for an hour or so and then let the solar panel catch the rest up. Then you won't need to worry. That's saying you have good sun all day long.