Solar conundrum (updated with shopping list)

Thanks for the replies. My thought was get a bigger solar system and add the batteries of needed. That way I am on the roof installing all at once. I will look into building my own combiner box and the strain reliefs for going into the fridge vent. I want to stick with the 4ga that way I can handle whatever I need to throw at it later on down the road. Man there is so much to consider!!