The 48-Volt Analog State-Of-Charge Meter is a convenient tool. It helps to understand how it works to be able to use it properly. This is a charge indicator, not a voltage indicator. It reads the voltage but only a threshold and not how you would imagine it. Let us see if we can elaborate. Suppose you have a multimeter at home. You put the positive and negative leads on the cart's main positive and main negative battery posts. In that case, it should read 48 volts or better. Even if it's dead.This is where we start to lose people, so hang in there. Your caddie runs on an overcharge. When you fully charge your 48-volt system, if you were to read it with your multimeter, you would find that the overall voltage was about 52. The golf cart runs on that overcharge. When you are reading 48 volts, you have plus or minus an eighth of a tank left of juice, so to speak. This golf cart meter measures that range of voltage. Call Buggies Unlimited and get one ordered.