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Unread 05-16-2009, 05:20 PM   #1
eflyguy
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Default Battery health - loaded voltage?

Stock EZGO, no idea of model. Took some V/A measurements just now seeing as I don't have to worry about wires any more - full charged voltage is just over 38V, drops to 33V at 200A if you floor it, or during a sustained 150A (i.e. the steepest part of our driveway), and recovers back to 38V immediately.

Batteries look OK to you? I couldn't find any numbers for a loaded battery here..

How much more power (torque) would a controller upgrade give me? I've seen claims of 30% - sounds too good to be true, but if the controller is eating up a bunch of the power, I guess it would be worthwhile.

My plan is to upgrade the motor, controller and batteries over time, so I have no issue changing out the controller now..
..a
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Unread 05-16-2009, 05:30 PM   #2
scottyb
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Default Re: Battery health - loaded voltage?

Quote:
Originally Posted by eflyguy View Post
Stock EZGO, no idea of model. Took some V/A measurements just now seeing as I don't have to worry about wires any more - full charged voltage is just over 38V, drops to 33V at 200A if you floor it, or during a sustained 150A (i.e. the steepest part of our driveway), and recovers back to 38V immediately.

Batteries look OK to you? I couldn't find any numbers for a loaded battery here..

How much more power (torque) would a controller upgrade give me? I've seen claims of 30% - sounds too good to be true, but if the controller is eating up a bunch of the power, I guess it would be worthwhile.

My plan is to upgrade the motor, controller and batteries over time, so I have no issue changing out the controller now..
..a


Controller don't eat up voltage? They regulate the flow like a faucet does to the flow of water.
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Unread 05-16-2009, 08:01 PM   #3
eflyguy
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Default Re: Battery health - loaded voltage?

Yeah, but a low quality controller will have a high resistance, which reduces power to the motor. I should probably measure the voltage drop across the controller under load..
..a
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Unread 05-16-2009, 08:22 PM   #4
eflyguy
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Default Re: Battery health - loaded voltage?

Just found the State of Charge sticky in the Club Car forum (why isn't it here?) but it doesn't say anything about loaded voltages..
http://www.buggiesgonewild.com/elect...-readings.html
..a
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