This economical Cool Cell is fitted with 3 fixed shelves. It will hold up to 12 group 27 or 29 batteries. It has an optional wiring harness with positive and negative busbars for 3 strings of batteries at 48 volts or 6 strings at 24 volts. Approximately 5” of space is available above the batteries for servicing. For hydrogen safety it has a 2” Convective Hydrogen Vent.