I just bought a Club Car golf cart and the guy had let it set for about 6 months and I'm having a problem with the battery charger. I can not get the battery charger to come on. I charged them with a regular battery charger to get some juice in them so maybe the cart charger would come on. How much does the whole pack need to turn on the charger. I have 45.6 volts in them should this be enough or do I need to keep charging. It is a 2001 48 volt system.