You are adjusting to less solar for six months by some reduction on consumption and some increase in 120v input.
I am looking at double the consumption in the cold months with furnace on and lights on more and no intention of reducing other consumption, so that is on top of less or no solar. This means a vast increase in generator/charger time or shore power time for the next six months. You can add all the panels on the roof you want, it does no good in the dark or under overcast skies. Waste of money. Solar is for when you have some sol.