Since 1995, 48 volt Club Cars come with an OBC. The OBC is a small device that is wired into the golf cart that’s purpose is to regulate the batteries charge. As you use and drive your golf cart, the OBC records the amount of energy consumed and then directs the charger to replace exactly the amount of energy needed to fully replenish the batteries.Generally folks will use the abbreviation OBC. This is simply an abbreviation for “On Board Computer” and is widely used when referring to the OnBoard Computer in your 48V Club Car.