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  1. M

    17S4P Power/Battery surge

    Its running an 12 fet 4110 controller. This is only a test at higher volts and normally running is 10-15Ah. The final item will be 7P minimum. Strangely, the power is not cutting off instantly after throttle off. MIke
  2. M

    17S4P Power/Battery surge

    Hi, I was running a 14S7P Samsung29E pack on a MAC 10T motor. As an experiment, I installed a new 17S4P pack with Panasonic 18650PF 2900 to test at the higher voltage. I didn't get 21% speed increase expected from the higher V, in fact I only got about 8%. Worse, I'm getting power surge under...
  3. M

    MAC 10T Jerky start

    P.S., Fetcher, what is the mid-motor on your ID/face photo Mike
  4. M

    MAC 10T Jerky start

    Thanks Fetcher. It seems there is hope with a slower power ramp up, although the controller has now started making noises intermittently while the motor doesn't move. Its quite hot as well, hope its not cooked before I've finished the experiment. Mike
  5. M

    MAC 10T Jerky start

    I checked, the sensors are connected and I am using an EM3EV controller. Is it possible that the nylon gears are distorting, absorbing the energy and then snapping back ? There is enough power so that is not the issue, its just "snatching" off the line. On the flat it's pretty smooth, not really...
  6. M

    MAC 10T Jerky start

    I'm running a MAC 10T on 14S7P and a 26" tire. Starting on the flat is fine but the start on a 15% incline is not - its jerky (I don't pedal). I'm only 180lbs. I'm trying to improve the bike and don't remember if I connected the hall sensors or not. Perhaps not and I don't remember if there are...
  7. M

    What range would entry-level ebike commuters need/want/use?

    Firstly, I'm no expert, my only claim is to have built an ebike including the removable battery. My experience is that although I like biking and do plenty without electric assistance, when on my ebike I'm lazy and don't pedal at all - unless I see police. Suspect I'm not alone on that one. With...
  8. M

    Samsung INR-18650-29E optimal charge/discharge protocol

    I'm effectively drawing 20Ah (1C) continuous although the controller will draw up to 35ah uphill or under acceleration for short periods.
  9. M

    Samsung INR-18650-29E optimal charge/discharge protocol

    I run a pack of 98 29E's in a 14S 51V, 7P 20Ah config. The BMS cut's off at about 46V, which is 3.3V per cell. I'm pretty happy, I get 40km at 45kph. The CA tells me I've used just over 18Ah and I estimate that there is about 1 useful Ah left in the pack and 1 further Ah where I don't want to...
  10. M

    Question - more volts or more amps ?

    Thanks for your contributions. I’ve drawn the following conclusions from your experiences. 1) All other factors held equal, increasing the volts will give more range or more speed or faster acceleration (torque) and potentially a bit of all. The relationship of volts and speed is theoretically...
  11. M

    Question - more volts or more amps ?

    Like everyone, I'm trying to get the most RANGE out of my battery pack which consists of (so far) 91 Samsung 29E batteries in a 13S, 7P configuration (at 45 kph - 28mph). Yesterday I was running a smaller 13S Panasonic test pack at the low end of its charge capacity and producing only 42V. It...
  12. M

    18650 battery pack build Kepler style

    Perfect. Thank you so much, I am indebted !
  13. M

    18650 battery pack build Kepler style

    Dear Kepler Thanks for your help. Paul did supply me with a BMS, photo attached. Following your photos, the black lead will be attached to the battery negative and the blue lead to the controller. It seems that you have another smaller but still high current black lead that is connected (I...
  14. M

    Programming an Infineon 12 fet 4110 - settings help please

    I can't help you but perhaps you can help me. I've bought an infineon 3077 12fet and am in the process of building a new 7P13S battery to be matched with a MAC10T. In testing, the motor pulled over 50kph (on a different controller provided by Aidewise, the local motor supplier). The legal...
  15. M

    18650 battery pack build Kepler style

    It's a work of art Kepler and instantly impressive. I want to build my own 13S 1000W battery (therefore it won't be so beautiful), to fit my bike, but have trouble finding a compact BMS. Could you give me a clue on the brand and source of your controller ? Mike
  16. M

    18650 battery pack build Kepler style

    It's a work of art and instantly impressive. I want to build my own 13S 1000W battery (therefore it won't be so beautiful), to fit my bike, but have trouble finding a compact BMS. Could you give me a clue on the brand and source of your controller ? Mike
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