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Old 06-28-2008, 02:29 AM   #3 (permalink)
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Not necessarily. For example, you can use 6 12v chargers to charge a 72v system (6*12 = 72). You don't even have to hook anything up or disconnect anything each time. This is often a cheaper route than a single 72v controller. The cost savings gets much more huge when you use a higher voltage system. 12 12v chargers can be purchased for like $250, whereas a 144v charger is like $1500!
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