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Originally Posted by james.lafrance
ok... I've seen the one guy's car and he had built individual chargers on each batt, is this feasible or practical? why not charge each one individually instead of getting one big costly charger? what do you mean by 'managing' multiple chargers? can I make this car 48v now then in a few months get more batteries and step it up to 72v? Will whatever motor I find be capable of this as well as the controller & contacter? Thanks again for all your help and patience
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I run a charger for every battery. It's easy, cheap, and gives each battery individual attention rather than just "hoping" each cell is balanced. It probably doesn't matter as much if you use new batteries, but since I use other people's rejects, it's very important. As to voltages, you can go from 48v to 72v without too much to worry, but if you want to get up to the highway speeds in the 96v and up range, you'll need to advance the brushes on your motor to prevent arching. Here's a GREAT set of videos explaining the procedure: