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  1. P

    My motor cuts out after 4 miles?

    Sounds like if I really want to fix this problem then I need better batteries. The problem is that I can spend $100 to $120 for 72V 12ah SLA. For the equivalent in Li batteries would set me back $1000 for the pack and chargers at least. No way. "40 amps for these batterys = 8 minute run time...
  2. P

    My motor cuts out after 4 miles?

    I just got home. I noticed that when it cut out is when the voltage would drop below about 55V. Wow. This essentially means that I can't use the bike to go to work. There's no way I'm biking up hill for over 4 miles. This morning I really went very light on the throttle and I still had to pedal...
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    My motor cuts out after 4 miles?

    Ok, I rode this morning 9 plus miles to work, with the controller installed outside so wind can cool it. When I got 5.6 miles into it the power cut off again. Of course, I had 3.5 more miles to go - uphill. That's alot of weight to lug up a hill. It did the same thing, on for 2 seconds, off for...
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    My motor cuts out after 4 miles?

    Well, I went ahead a bought a load tester. All of the batteries are fine. The problem probably is that, in my infinite wisdom, I had decided to place the controller underneath a gortex bag with the chargers and batteries. I guess my rationale was to prevent the controller from getting wet...
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    My motor cuts out after 4 miles?

    1. Yes. The controller gets hot, which is odd because that new 40amp 72v controller is supposed to have the upgraded mosfets that are supposed to handle the current. 2. A battery certainly could be bad. I, however, have no idea how to do a load test. Do I have to buy some soft of load...
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    My motor cuts out after 4 miles?

    I have a mountainbike with a rear X-Lyte 5 hub motor. I have six 12V 12ah SLA batteries (72V 12ah total). I recently got a new 40 amp immediate start controller. After about 3.5 to 4 miles of normal hybrid riding, the power suddenly cuts off. I have to wait a few seconds and it kicks back on for...
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    Riding in the rain shorted out my ebike

    Well, I have a thumb throttle. But there is a portion of the lead that goes to the controller that was not waterproofed. It was pouring. I could see that it could short out. But now that I have a new controller and everything, luckily the throttle still works normally. So it needed to be dried...
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    Riding in the rain shorted out my ebike

    That 50amp controller is $310 without shipping. Damn. 50amps would drain my batteries in a couple minutes probably. About the fuse, if I had a 40amp controller, would I use a 50amp 100V fuse? Or what?
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    Riding in the rain shorted out my ebike

    I do not have ebrakes. I also do not have a fuse. I unplugged the controller from the motor and the resistance went away. Yay! So this means that something is shorted out in the controller. Of course, the main thing that will get shorted out is the mosfets. Too bad. The batteries are fully...
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    Riding in the rain shorted out my ebike

    I have a rear wheel XLyte hub BLDC Motor. I use a 72V 20amp controller. I have two 36V SLA in series (so 72V total). Horrible problem a couple days ago. I was riding to work in the rain. Suddenly the power kicked on wide open, eventhough I was not pressing the throttle. I had to brake...
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