Need to run 24 volt loads off a 48 volt bank
But using a small MPPT controller to charge a small 24 volt bank from the 48 volt bank is still an interesting option to me. (pretty standard) then you will need 14kwhr worth of batteries. This will cost you around $4000 for decent lead acid batteries. In that case if your average draw is 1kw then you will need a ~144kwhr battery bank