This E-Z-Go Express Golf Cart Battery Watering System is designed specifically for your new 72 Volt E-Z-Go Express 4×4 EV. Designed to work with any 72 Volt battery bank, whether it has the factory Trojan T1275s or other comparable 12 volt batteries. If you have 6x 12-volt batteries to equal 72v. (Common set-up in all Gem, Star and Some E-Z-Go Carts).