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  1. E

    help with BMS S12SN controller

    Hello, I recently received a S12SN controller from BMS Battery and thought I'd have an easy time swapping out the KU163 controller that came with my Q11 motor, but alas, tis not so. I had a lot of help from several folks when I did the original setup and was hoping to call on their knowledge...
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    help troubleshooting first ebike build

    A small plea for help: I excitedly assembled my first ebike kit yesterday, a bmsbattery Q11 48V 1kw kit, and attached the battery-- a calibike 48V 15Ah battery-- and whalah! Nothing. No power, no sound, nothing when I gave a little twist on the throttle. I'd appreciate any suggestions for...
  3. E

    choosing the right battery

    I'm hoping someone can give me some guidance as I'm still struggling with the electrical math. I bought at Q11 48V 1kw ki from BMSbattery that I am waiting on. I understand from reading Micah Toll's book that it comes with a 30A controller. The BMS website says the controller is "1kW...
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    considering hill grades on first ebike build

    Hi Folks, I'm contemplating my first e-bike build and am wondering whether I should be factoring in a 17% grade hill that will be a part of nearly every ride as I choose motors and battery systems. I'm electrifying an old Schwinn tandem, about 50 lbs, and I weigh in at 215lbs. The tandem may...
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