Quote:
Originally Posted by MazdaMatt
So the moral is - More batteries is better, always. 12 battereis in series will be happy batteries and give you high speed. 12 batteries in two six-battery strings will give you less-happy batteries and mad acceleration.
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I THINK that more batteries is always better, with few exceptions.
1) Weight - you just can't keep adding weight to a vehicle and expect it to perform the same
2) Voltage limitations of existing charger, controller, and motor
If you already own a 72V charger and a 72V controller, it may not made sense to upgrade to 144 volts, if you just have to buy new of each. Instead, it may make sense to do "buddy-pairs" of batteries to add the additional range, although no more speed, to the vehicle without having to upgrade everything else.
12 batteries in 2 6-strings most likely won't give you mad acceleration. Most likely, you would be limited by your controller, unless you are using crappy used batteries like I am in the car.
Also, those electric drag racer guys (NEDRA, etc) get really picky about exactly battery size, capacity, configuration, chemistry, - but they aren't designing eco-grocery-getters...