Your best bet would be to rewire the cells to put out 4x amps, 1/4x voltage and use a 12v motor - that would be plenty of power for a mill creek 16.
Do not use a resistor to drop voltage, you will waste most of your power.
If you need to keep the pack at 48v to swap out to your bike you can buy a 48/12 transformer. Make sure it can handle the amps, though.
Denny Wolfe
On 9/21/2011 3:30 PM, Kellan wrote:
Hi,
I have a 48V 15ah lithium ion (LiFePO4)battery that I use for an electric bike I built. I would also like to use it to power a small boat, possibly my CLC Mill Creek 16.5 open cockpit kayak. The simplest thing for starters would be to use a stock trolling motor. Will I need to step the voltage down to 12V? Can I do that with just a resistor? If so, how do I determine what resistor to use.
Thanks,
Kellan
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