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  1. bachmaninoff

    MS Windows-7 screwed me, Linux/Ubuntu discussion

    Windows has screwed me over a few times. The most annoying thing is when you have to re-install for whatever reason, and then you don't have access to internet for over a month, and it says you have to activate. I don't like software (that I've paid for) dictating such terms. Of course all...
  2. bachmaninoff

    Recommendation for 72V 25ah pack (commuter)

    I took the plunge and got another 48V 25AH from Sunthing. [fingers crossed!] I'll be sure to open this up (all the way) when I receive it - as well as posting the photos here.
  3. bachmaninoff

    Recommendation for 72V 25ah pack (commuter)

    Haha, no doubt! Hmmm: http://www.ebayitem.com/131549442996 Man, maybe I should just double my pack... I'll need a new controller, but maybe this is where I'm headed anyways...
  4. bachmaninoff

    Recommendation for 72V 25ah pack (commuter)

    That would probably be the most cost effective if its feasible. So even if my current pack has some wear on it, I could stick them on the same BMS? EDIT: I didn't get the original battery from sun-thing, but they look close on the outside...
  5. bachmaninoff

    Recommendation for 72V 25ah pack (commuter)

    Interesting, thanks for the info!
  6. bachmaninoff

    Recommendation for 72V 25ah pack (commuter)

    I think I need a 72V 25AH+ battery. I currently have a 48V 20AH lifepo4 pouch pack which is great for my 40mi commute (round trip), but I find myself wanting more. :) Perhaps a kind soul could steer me in the right direction. I bought a C7225-NC (36V-72V, 25A) controller from ebikes.ca...
  7. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Sorry - I didn't get any notification that there were additional responses on this thread, plus I've been away on deployment. This pack has been holding up pretty well. I use it almost exclusively to commute to and from work (40mi round trip with some decent hills). On my KMX trike I've put...
  8. bachmaninoff

    Tool for opening motor.

    Haven't seen this exact one, but there's one similar on GreenBikeKit: http://www.greenbikekit.com/bafang-8fun-bldc-hub-motor-opening-wrench.html I ordered this last week...
  9. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    You are most welcome, thanks for your help! I had a blast checking this out!
  10. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Ok, I'm going to assume there's a pot in the charger to do this... Looking forward to taking it apart! Will do, when I was feeling them before they felt pretty solid. Definitely! Thanks dnmun for all your help and suggestions!
  11. bachmaninoff

    considering hill grades on first ebike build

    Absolutely! Do you have a preference for geared or direct drive hub motor? Or are you thinking about a middrive solution? https://www.electricbike.com/motor-tech-learn-the-terms-part-1/
  12. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Pack has been on the charger for a few hours now and I haven't seen LED1 turn amber for a while... Voltages (while plugged in) are as follows: 1. 3.56 2. 3.54 3. 3.56 4. 3.55 5. 3.56 6. 3.56 7. 3.55 8. 3.56 9. 3.56 10. 3.56 11. 3.56 12. 3.54 13. 3.56 14. 3.56 15. 3.58...
  13. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    The charger LED1 may look green in the photo, but its switching back and forth between amber and green. I put on 1.5ah yesterday just having the cycle illuminator, CA, rear light and LED whip turned on, and did a quick throttle check too. Let me know if you need a different angle on these...
  14. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    I was wondering the same thing... Did re-connecting the sense wire have an effect on this maybe? I did solder the sense wire back on the tab and I'm assuming it was the correct tab since my bike works now. Sounds great - I appreciate your help! First thing tomorrow I'll take the pack back...
  15. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Ok I soldered the loose wire back onto the tab. Now I can measure all the voltages individually from the BMS, and still getting 57V+ across all cells. However I'm measuring 47.5V both at the plug and the BMS output. I guess I have a faulty BMS? Edit: Let it sit for a while, now its reading...
  16. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Ok, did some multimeter readings on the pouch tabs themselves before I solder the wire back to the tab... Cell 12 measures 3.61V, and cell 11 measures 3.83V... Commencing research on lifepo4 pouch tolerance. Looking at: https://www.endless-sphere.com/forums/viewtopic.php?f=14&t=55103...
  17. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Bingo - wire is the same wire that was common to both weird measurements. amberwolf, Gregory, dogman dan and dnmun - thanks for your help!
  18. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Hey Gregory thanks for the help with those photos! Ok, looks like I'm going here next... Will post results in a while.
  19. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Wow thanks for all the help! I have measured cells 1-16 (haha can't believe I missed half of them!) as follows (plugged into charger with charger showing green and red LEDs) : 1. 3.67V 2. 3.59V 3. 3.68V 4. 3.59V 5. 3.63V 6. 3.62V 7. 3.61V 8. 3.60V 9. 3.61V 10. 3.61V 11. ...
  20. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Not really happy with the soldering on those points, so tomorrow I'll probably check the connections and re-wet those points of necessary... Looks like some other points could use that too.
  21. bachmaninoff

    I should've read this forum before I bought my battery from sun-

    Indeed I shall thanks: http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=64888
  22. bachmaninoff

    Troubleshooting 48V 25ah lifepo4

    Purchased this from Golden Motor USA on ebay, and have been pretty happy with it putting over 1200 miles on my KMX. It has gotten me to and from work without having to charge at work - 40 miles round trip with some serious hills! Sadly it decided to stop accepting a charge yesterday. Tried...
  23. bachmaninoff

    I should've read this forum before I bought my battery from sun-

    That's awesome that you were able to fix this! I also have 25ah battery (but 48V) that has stopped charging yesterday (looks like the same BMS). Tried two different chargers, lights up red and green on both. Voltage on battery reads 47V with a multimeter (has been 57V fresh off the charger up...
  24. bachmaninoff

    How do I short the 3 speed wire

    On my KU123 I also have a three speed switch input, which I keep in the high setting by shorting two of the wires together since I control speed with the throttle. So if you want an actual switch for it, looks like you need to get this...
  25. bachmaninoff

    Bafang BPM2/KU123 or EBK on Bike-E

    I've recently been riding my BikeE with an e-bikekit system (circa 2011), but with the BPM2 instead of the EBK geared motor. Seems to be plug and play! Used this configuration 6 times, so it's got 240 miles on it so far. I had to put Loctite on the spoke threads since they kept coming loose...
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