That would be (one example) 4x 6 volt @ 200 AH "golf cart" batteries in series (for 25 volts) and 3 parallel strings (for 600 AH @ 24 volt battery bank). Or 12 golf cart type batteries. It is good to start with less expensive batteries as many of us have "killed" our first battery bank pretty quickly (mistakes, not paying attention, etc.).
Now to charge the battery bank, we do two calculations. One sizing the array to give 5% to 13% or so rate of charge. The other based on hours of sun per day for your region and your daily loads. First, sizing for charging.
5% is good for a weekend/summer seasonal system. 10%+ rate of charge is better for full time off grid system: