I use 2 6v golf cart batteries. They'll last far longer than 12v's. We had to replace our fridge last year. The new one has all kinds of electronic crap on it and uses far more power. The batteries used to last a week or more. Now it's more like 5 days, less if my wife runs the fan in the range hood. Fans pull a lot of power but the one in the bathroom is essential.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.