Maximum - 12 volt Deep Cycle Batteries Connected in Parallel

If you need such big battery bank, you might evaluate your power consumption.
I had 4 GC batteries in my conversion and even before LED lights I could use them for lighting, water pump and 1l of hot coffee made every morning + occasional microvawe use.
On usual camping it took me 3 days before I had to start generator.
You can always substitute the weight of the batteries with the weight of solar panels or weight of generator.
Obviously you will find guys who will want to run washer & dryer on battery power.