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  1. J

    $14.99 72v Sunwin Controller

    I've had problem after re-assembling my ebike. No action from the throttle, looked inside the controller the LED was flashing 6 times. Its a SUNWIN 1500W Controller. I've found info that tells me 6 flashes is a problem with one of the phases. I tested the phases, one of them had a short to...
  2. J

    1500W Controller SUNWIN GND Short Phase

    Hi, I've had problem after re-assembling my ebike. No action from the throttle, looked inside the controller the LED was flashing 6 times. I've found info that tells me 6 flashes is a problem with one of the phases. I tested the phases, one of them had a short to ground. So there were 3 FETs...
  3. J

    $14.99 72v Sunwin Controller

    Does anyone have an error code list for this controller? I have just re-assembled my bike and it's not working. The motor spun for a second and then nothing. Looking inside the controller, the LED is blinking 6 times in a repetitive loop. I've only changed the battery from 13s to 14s. I...
  4. J

    Adjusting BMS Battery Charger Cut Off Voltage

    Maybe I should have changed the title. The charger I have is from the website called "BMS Battery". So this post is nothing to do with the BMS as such. I want to adjust the charge voltage output for 14s. I can only get it up to 56V. The trim pot has then reached its limit. Is there anyway I can...
  5. J

    Adjusting BMS Battery Charger Cut Off Voltage

    Apologies, I meant charger.
  6. J

    Adjusting BMS Battery Charger Cut Off Voltage

    This is my actual controller, the earlier image is a similar controller. https://drive.google.com/open?id=1wZwlmoaP7RaFRsjNFAO6ZaxUQTtAb7ZQ
  7. J

    Adjusting BMS Battery Charger Cut Off Voltage

    Thanks for the reply. Yes I was concerned about the BMS not balancing the cells. As I've read that most of the BMSs don't start to balance until 4.2V.
  8. J

    Adjusting BMS Battery Charger Cut Off Voltage

    Hi, I have a new battery and want to use my old charger from BMS battery. My new battery is 14s, to requires a voltage of 58.8V. I previously had a 12s setup. I found out that the voltage on these charger can be adjusted via a trim pot, however my charger maxes out at 56V. Can I modify the...
  9. J

    Add BMS to 12s Lipo

    Hi, I have two mulitstar 6s bricks connected in serial. I bulk charge in serial. I would like to add a BMS like the one in the link How would I use my bulk charger with two of these BMS? Could I just plug each of the balance leads from each battery into each of the BMSs and connect the bulk...
  10. J

    $14.99 72v Sunwin Controller

    Thanks for the replies, I think I'll add the 3 speed switch to the controller rather than to the bars.
  11. J

    Problems with soldering xt90 to lips

    Hi all, I'm trying to solder xt90 connectors to some turnigy lipos. I've take the 5.5 bullet connector off. However the solder doesn't seem to take to the wire from the battery. Could you tell me which type of solder I need? thanks
  12. J

    $14.99 72v Sunwin Controller

    What I'm trying to understand is what the use of a 3 speed switch when you can control the speed with a throttle?
  13. J

    $14.99 72v Sunwin Controller

    With regards the the 3 speed switch. How does this work?? Are the lower speeds the same as using the throttle to control the speed? Basically I don't want a 3 speed switch and would have it default to the fastest speed. So if I use less throttle would it be the same as using a lower speed...
  14. J

    Max current for 9-pin motor connectors

    Sorry a bit off topic, but can anyone provide a link to where I can get one of these cables please?
  15. J

    $14.99 72v Sunwin Controller

    If the 3 speed switch isn't installed. Which speed will the controller be set to? Thanks
  16. J

    $14.99 72v Sunwin Controller

    Thanks for the reply
  17. J

    $14.99 72v Sunwin Controller

    Can anyone tell me what size phase wires to order to go with this controller please? I'm pretty new to this. Cheers
  18. J

    $14.99 72v Sunwin Controller

    Just taken delivery of my 48v 18fet controller. Took less than 10 days to the UK.
  19. J

    $14.99 72v Sunwin Controller

    I've just bought a 48v 1500w version. http://www.ebay.co.uk/itm/181531725413 I will update this thread with photos and other information when I receive the controller. I'm using it for my first e bike build. It's going to be coupled with a Crystalyte ht3540.
  20. J

    Haibike Dh conversion

    Adding long shocks front and back would raise the bb height, making it not very good for cornering. I will still watch your progress. :D
  21. J

    New 80-100 130kv + simple 2-stage reduction

    Subscribed. Looks very interesting.
  22. J

    Electric Dirtbike 15 KW

    It's a small bike though. I don't know much about dirt bikes. Is its like a pit bike or a kids motorcross like a kx80? Cheers
  23. J

    Electric Dirtbike 15 KW

    What make / brand is the original bike? Great build.
  24. J

    Direct Drive Genesis

    Does anyone have a link to where I can buy this type of motor please?
  25. J

    build blog->fully aluminium trail/freeride BHT Frame

    Love this bike. Quality build. Looks great. I think a motocross style seat would look better than a bicycle style!
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