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  1. A

    Integrated controllers

    For my next build I'm seriously contemplating an integrated controller due to less wiring and possible points of water ingress. What are the advantages or disadvantages of integrating the controller in the battery versus the hub motor? I would imagine the hub is the preferred location (a la the...
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    An excellent battery bag

    Out of exasperation I gave up on traditional ebike battery bags a couple of years ago since they were all constructed so poorly and would end up ripping after a couple of months. I wanted to share with the community what I have discovered to be a vastly superior solution to battery bags: wide...
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    Measuring individual cell voltage via female jst-xh?

    I've got a 14S (4S+4s+4s+2s) 15Ah (3x5Ah) LiPo battery that is paralleled together via the balancing taps. The parallel harnesses I bought have 6 female inputs but I only use 3 of them at one time. The male ends of the parallel harnesses terminate in a 14S jst-xh male port that is connected to...
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    Best waterproof thumb throttle?

    Well my current throttle (Wilderness Energy) just gave up the good fight to a rainstorm, even though I've always kept it sealed inside a ziplock bag with a zip-tie. This is the second one I've lost to the rain. Are there any good thumb throttles on the market that aren't so vulnerable to the...
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    New BMS, only outputting exactly 1/2 input voltage

    I just wired up a new 14S BMS from Greentime and it is only outputting exactly 1/2 the input voltage. I've used these BMS before on other battery builds and never had an issue. I hooked up a backup BMS (the same 14S greentime one) to the same battery and it worked without any problems. I was...
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    Motor recommendation for lightweight build

    I'm looking for a lightweight motor that can handle about 1200W or so (20A x 60V) for a front hub build. I was thinking of going with a Crystalite 400 series but was wondering if that might be overkill and I could possibly go even lighter. Not too interested in a geared motor due to noise and...
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    Controller keeps cutting out (not BMS or battery-related)

    My SO's e-bike cuts out at the exact same point in her trip each day, on a flat point of the road. I originally diagnosed it as a poor cell that was possibly tripping the LVC of the controller. I had been running a 12S LiPo setup w/o a BMS so that could not have been the culprit. I decided to...
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    Safest way to add 2S 'booster' pack

    I've got a 15Ah 12S LiPo battery pack that has started sagging enough on hills to trigger the LVC on one of my ebikes. It's about 1yr old. I also have another 15Ah 14S battery with 58.8V charger and a BMS that I built. I'd like to add additional 2S batteries to the 12S pack and hook it up to a...
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    Wheel dishing

    I just finished rebuilding my front aotema hub motor into a new wheel (Sun Rhyno Lite) with new 13/14g single-butted spokes. I followed Sheldon Brown's wheel building advice and tightened all of the nipples equally onto the spokes and then slowly tightened up the wheel uniformly until it "felt...
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    HK sold out of 7s LiPo -- any other good vendors

    I'm building a 14S LiPo battery for my bike, and had ordered 4x7s 5.8Ah Zippy Compact batteries from HK 4 days ago. Well they just sent me an email telling me that their inventory was off and they don't actually have the batteries! Well I went to browse for different 7s batteries but they only...
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    New wheel for Aotema

    Hi, I have an Aotema front hub motor laced in the 700c stock wheel included in most of the kits the Aotema is sold with. It is a lousy rim and the sidewall is already dented in several places. The stock rim can basically only take Maxxis Hookworms because it is so damn wide, also the rim...
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    Charging battery while still connected to controller?

    Hello, i was wondering if it is generally safe to charge a battery (via a BMS) while it is still connected to the controller. For example, using a BMS with separate discharge and charge (-) ports, such as: I would just have a y-adapter on the (+) wire, one side of which is always connected...
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    How many of you are invested in battery tech companies?

    I'd consider this forum to be one of the most knowledgeable about battery technology and the implications that it holds for the future. How do you see the next 10-20 years playing out in regards to energy storage? Will EVs of all shapes and sizes continue to be niche products or will most of our...
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    Max continuous wattage for sensorless Aotema

    Hi, i was wondering what a safe continuous wattage would be for the sensorless aotema hub motor. I am using the stock 22A controller right now at 48V but would be interested in trying a 30A or 45A controller at 48V for some of the steep hills around my house. Sound safe enough?
  15. A

    Looking for a BMS solution

    Past (I like to include some background so you'll know where I'm coming from and hopefully which direction to send me): I converted my commuter to an ebike about two years ago using an Aotema front hub motor kit. I've been running 4x6s Hobby King LiPo 2s2p for a 10Ah 48V pack that connects to...
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    How much electricty does it take to charge my pack?

    My work offered to let me charge my ebike battery there if I wanted to. It is slightly less convenient for me, because I never know what my plan may be on the weekend. However, if it will save me sufficient money I'd be game for it. So how much power does the average pack cost to charge? I have...
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    Best connectors for my 8AWG lipo

    So I finally got everything put together (Aotema kit, 4x6s 35C HK lipo), took my ebike for a ride around the neighborhood ( :D ) and everything worked great. Came back to charge the batteries and the 5.5mm bullets on one of my lipo packs shorted, shattering the bullets :evil: :evil: :evil...
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    What is this connector?

    I thought I was finally going to build everything today but of course I ran into a new wrench. This is the connector from my controller that will go to my LiPo battery. I glanced at it a few weeks ago and just assumed it was a bullet connector, but that is obviously not the case. Anyone know...
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    Are these batteries and charger for my new kit OK?

    So after much research, I purchased this kit for my existing bike: http://www.ebay.com/itm/301009247892?_trksid=p2059210.m2749.l2649&var=600165093404&ssPageName=STRK%3AMEBIDX%3AIT I have very short commutes but a big hill and would like to carry the least amount of battery with me as possible...
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    First-timer, need a DIY kit recommendation

    Location: Alabama, USA Existing bike: Bikesdirect.com 700C unbranded alum hybrid with custom VooDoo steel fork, 32 conti tires, rear rack with crate, pedals, pedal extenders, stem, fenders, vert grips, mirror, 3x8 alivio Use: Commuter Commute: (Steep) downhill 2 miles from home to work, 1 mile...
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