We just bought a 2022 transcend by grand design end it comes with a 12 V fridge. There are 2 6 V batteries on it and a 165 W solar panel. I know there are many scenarios that will impact how much solar you need but I have the following question. Under worst case scenario with minimal sunlight how long would the 2 12 V batteries? Would you get 24 hours out of it? Just trying to determine if I need to add another solar panel.