How to sense voltage of 48 V 600 Ah VRLA battery bank for Arduino
A voltage divider should do fine. As long as you have no load on the divider and are using it to only read the battery voltage then you will be fine. 

If you use the divider equation of Vdiv = Vin*(R2/R1+R2) then you can choose your own resistor values to give yourself a readable voltage.