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  1. S

    How to know if battery supports regen?

    Hi, How do I know my battery supports regen? Is it depending of what BMS is used? I have a battery a few years old from BMSBattery "bottle-09". I have not opened it up to look at the BMS but according to the link below this is the BMS that I have. It has a charge and discharge port. And with...
  2. S

    What charge state best to check bad cell?

    I have a battery where one paralell pack (8P) gets drained faster. And it charges faster too, though last time (if I remember correct) it charged slower so I am not sure anymore... 0,1V or so in difference. Anyway when is best time to take battery apart to compare the 8 cells? I was thinking...
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    Will my front fork setup hold or failure?

    In another of my topics a user here wrote like I was crazy if I was going to run this setup, so I would like know what others think (don't think he knew any specs, he just saw a picture). I drive my two kids in it. I have a cargo bike with 20" wheel in front, with a Leaf 1000W motor. I run it...
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    Why short voltage increase when braking? S12S

    I have the sine wave S12S from BMSBattery. It is not supposed to have regen function. But when the brake sensor activates the motor does a short sound (like braking) and the voltage on battery increases 1 volt or so. For like a second, and then acts normal again. The motor is spinning without...
  5. S

    Brake can't reach the rotor mounted on front motor

    On my new front 14 mm hub motor with IS disc mount fork, I can't get standard shimano brake adapters to fit. If I use 180 mm rotor and adapter the brake will only be able to touch the edge of the rotor. The fork has "lawyers lips" and the motor axle is 14mm. I have no normal wheel to compare...
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    Fuses on BMS balance wires?

    I have not seen much information about this. I have tried to search some but not found much. Are most people building there own batterys skipping this? Is there any good examples out here how to fuse the wires? Material and build example? It should be dangerous if the small wires gets damage...
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    Nexus 7 strong enough for mid drive?

    I have a cargo bike with Nexus inter 7 typed on it. It has internal gears, no brake (I use hand brake). Can you use a BBS02 500W/750W on those gears? Or will they soon wear out or break? I have no experience with this but if that is likely I will probably go for DD hub motor instead (20" front).
  8. S

    Buy new BBS02 and reducing the power?

    Hi, I am thinking of buy a Bafang BBS02 from em3ev. There seems to bee two versions of the 48V; 500W 18A and 750W 25A. To start with I want to use my old battery that I have on another bike, but when using up to 20A on that hub motor the voltage is dropping some. But in the future when I change...
  9. S

    20" wheel, DD or geared for steep hills?

    Hi! I have a cargo bike with 20" front wheel and need hill climbing help. Where I live there are some really steep hills, but most often not so long. Most people without motors are walking with their bikes in them. But if you pedal you are probably finished within 10 seconds, but maybe there...
  10. S

    Multipin connector for BMS?

    Hi, I have Adaptto BMS, that have 5-pin connectors for each 4S group. I dont want to solder them directly on battery so I need some connectors between them. What type is best to user here? See my attached picture how I want to do (wiring not correct). I need like 14 1-pin connectors from each...
  11. S

    Illegal to own powerful ebike?

    Hi! I was wondering what the laws says about this. I live in Sweden but can't find any information on this, but I think it is pretty similair in EU. So maybe someone knows the rules in EU for this? The law (in sweden) says 250W motor effect, 25km/h, must pedal. So say I have 3kW, then it's not...
  12. S

    Best motor type for cargo bike?

    Hi, Updated information in post written 2017-02-10 so skip my first post. I am planning to buy a 3-wheel cargo bike, se link below (link to the cheapest one, maybe I will buy another). I will use it together with my two small children, maybe a grown up in there also, to the beach and other...
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    E-bike battery for lawn mower?

    I need a new lawn mower at home and was thinking of buying a Bosch Rotak 43 li. They often sell them with two 4Ah batterys but I am not sure that will be enough. You can also buy it without battery and charger and save 200-300 usd. I have a 36V 15Ah battery on the bike my girlfriend uses (not...
  14. S

    How to measure spoke length, for replacement

    Hi, I have a Xofo xfvk 500W (I think copy of Bafang CST 500W), in a 700C wheel. I saw today that one spoke is broken. I thought I could easy find information what spoke to replace with but only find spoke calculations for new builds... Anyone know where I can buy new spokes in EU pretty quick...
  15. S

    Cheap extra charger?

    I have these two batterys with including chargers: https://bmsbattery.com/ebike-battery/684-48v116ah-bottle-09-panasonic-battery-charger-battery.html https://bmsbattery.com/ebike-battery/232-36v15ah-li-ion-alloy-05-case-ebike-battery-pack-ecitypower-battery.html I have read that you should not...
  16. S

    How do I know my battery is empty?

    Hi, I have a 48V11,6Ah bottle-09 battery from BMSB: https://bmsbattery.com/ebike-battery/684-48v116ah-bottle-09-panasonic-battery-charger-battery.html The display is this one, and the controller is a 36V: http://www.xofomotor.com/display.asp?id=807 How will I know how long trip I can use it...
  17. S

    My tourqe arm installation and cable mount? And charging...

    Hi, 1. Is this a correct installation of my tourqe arms? See my attached picture. I will have one on both sides even though the motor isn't that strong. I think I will put some rubber between the materials. Or should I change to a cable clamp like this instead...
  18. S

    11Ah LifePO4 or 15Ah Li-Ion

    Hi, I have a bike like in the picture/link below, så I guess a battery on the carrier back is the only solution. I have a 36V 250W geared front motor with a 15A controller. http://www.cykelfritid.se/pub_images/original/116841-2_2107.jpg Should I choose a 36V11Ah LifePO4...
  19. S

    Bafang CST rpm?

    I am planning to buy a Bafang CST 500W 36V, and it's cheaper on ELifeBike.com (with 28" wheel and shipping) so I thought I buy it from him. You can choose between 36V and 48V but in the list it says "36V CST 36V500W26-205". I asked him on mail what 26-205 means and he said 26 is the model number...
  20. S

    Help me choose a conversion kit

    Hello, I Have a bike like this, 28" wheels: I would like to add a motor to it, just for fun riding but if it works great maybe even use it instead of the car to my job. I have never tested an eBike but I have 20km to the work and the last time I used the bike it took me one hour and I also...
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