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Old 03-08-2009, 03:24 AM   #40 (permalink)
Coyote X
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Join Date: Dec 2007
Location: Southen West Virginia
Posts: 654

Metro XFi - '93 Geo Metro XFi Convertible
90 day: 62.17 mpg (US)

DR650SE - '07 Suzuki DR650SE
90 day: 55.26 mpg (US)
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I am putting it on the shaft. There is room beside the transmission with the 3 cyl to run the chain up to where the motor will be sitting.

The 72301 controller is on its way. I went ahead and ordered the 72V 8A charger they have. I picked up the last 2 batteries today also and got a pair of battery boxes for the batteries that go behind the seats. So hopefully next weekend I can start installing everything. The sprockets have also came in. I have a 9 tooth drive sprocket and 32, 34, and 36 driven sprockets. The last thing I need to find is some welding cable. I am thinking for 300 amps I probably need 2 gauge minimum. 0 if I can find it. 4 gauge is probably good for going from the controller to the motor depending on the distance. I also need to order the parts to build a battery balancer and the stuff to modify the alternator to make it output 14.4V or 86.4V depending on what I want to charge.

The instructions for the controller leaves out a few details. Like do I need to ground the 72V to the chassis or leave it floating and just connect it directly to the controller only? And is it better to put the controller close to the batteries or closer to the motor? I could easily fit it in the trunk but if it is better near the motor I could make room for it under the hood as well.

On ebay I could get 3x6 solar cells 1.75W each. So with 200 of them I could get a few amps of charging. It would peak at 4.5A@72V. So if the car was parked outside with partially discharged batteries for a while I might get enough charge to get a few more miles out of it. I am really tempted to try that out after I get this electric drive working. It is another one of those things that won't pay off in saving money but it would be really cool to have on the car.
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