want to build said:
For my 30lb Minnkota, I built a 24AH pack using 8AH lipo pouch cells three years ago. I use it in a kayak.
All-in price is $70 for my pack: $30(cells)+$14(I upgraded resistor-network minnkota controller with much more efficient PWM variable speed)+$25(water-proof case, fittings, copper cable).
hi very interesting. are ;you saying there is a device that we can add to the old minnkota tech to give it the caracteristic of the new minn kota teck( only using the power needed at low speed)? if you have an how to link about that i would appreciate it .
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Exactly. It is actually a very simple modification.
Remove control assembly, several wires lead to motor through downtube. The red/black wires are the DC brushed motor leads, the yellow wires are resistor (which are housed in motor housing) wires. You no longer need resistor wires. Just hook controller up to motor red/black, and hook power up to controller. Done.
You will need a waterproof enclosure for new controller. I simply put the controller inside the same enclosure I used for the battery and called it a day.
The MPP controller provides gobs more range compared to stock speed controller, especially when you troll at slower speeds (when resistors would have been reducing current to motor).
Includes forward/reverse PWM features.
Here is a link.
https://www.amazon.com/s?k=60A+pwm+speed&ref=nb_sb_noss_2
I bought mine on ebay and got it for about $15.....its $19 now:
https://www.ebay.com/itm/US-10-55V-100A-5000W-Reversible-DC-Motor-Speed-Controller-PWM-Control-Soft-Start/402377320655
60 amp sustained rating should work fine for up to 50lb thrust motor.