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Old 02-08-2009, 11:29 PM   #7 (permalink)
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Originally Posted by bennelson View Post

I am also imagining a circumstance where a low-budget EV might need to travel a short section of higher speed road. Near me, it's all 25 mph roads except right outside my house, where it's 45, and it's a 55 mph zone just on the other side of the hill. A 48 volt controller, with a bypass to 60 or 72v would work great in that instance.
Ooh, maybe 96V worth of batteries? Run them in parallel strings at 48V with the controller, with a bypass contactor that series-connects them at 96V? That way, your batteries always still get discharged at the same rate. Just make sure that you're below the top speed of the 48V controller before cutting the controller back in.

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