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    Diagnosing potted battery pack | Premature Failure | Cells or BMS?

    Good points. From a car replacement standpoint the heavier the cargo the lighter I want the bike and trailer to be. You're right though, the weight savings of splitting the battery pack would probably only shed a few lbs and the Bafang Ultra is definitely capable of handling the higher power...
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    Diagnosing potted battery pack | Premature Failure | Cells or BMS?

    Yeah currently 30A max stock controller... brings up a good point though I'll likely try a controller upgrade soon (probably Archon x1) which can go up to 45A. Can you elaborate a little more on why to avoid using two packs. How about using a medium size pack paired with a smaller pack? The...
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    Another commuter build, my first.

    Beautiful work, wish I could weld like that!
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    Diagnosing potted battery pack | Premature Failure | Cells or BMS?

    Can't be certain about the cell authenticity at this point, but I've bought a few battery packs from this company and feel pretty confident they wouldn't jeopardize their brand reputation using counterfeits. Can you elaborate on 'failure is always 90% BMS'? Is it more likely that the BMS would...
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    Emtb - Bafang Ultra G510 3500W Innotrace controller

    Beautiful build, great job on the battery pack mod!
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    Diagnosing potted battery pack | Premature Failure | Cells or BMS?

    Please help clarify the main cause of premature failure for a potted 52v 12ah (Samsung 30Q) eBike battery pack. It's been having trouble balancing but with some patience it can get up to 58.6v, then rests at 58.4v the next morning (sometimes dips closer to 56-57v after sitting for a day or...
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    So far v2 has almost a hundred responses. The average score is 30 wh/mi. Still seems a bit high but I'll have to look through the responses and see if some of the question weights need to be reduced. I published a calc walk-through / 500w range test vid: https://youtu.be/SZgveHK-wJo ... my...
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    No formulas on the step 1 'Efficiency Score' form - it's basically just a quiz that tallies points and gives an estimated Wh/mi. Each point adds a Wh/mi. You can see the amount of points for each response after clicking the 'view score' button on the form. It also gives an option to see all the...
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    I just updated the original page with a v2 version of the quiz form. ... got some good feedback over on Reddit and about 50 quiz responses. The average Wh/mi score was 37 which seemed way too high since most power responses were 250w or  500w. I think the quiz was oversimplified so I made the...
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    I added battery voltage but am not sure how to weigh or penalize it. Although increasing voltage will increase the amount of watt hours and probably range - will the change in voltage change the energy efficiency?
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    You'll notice that the first responses are 0 or 1 and the last is the highest. Each point = 1 Wh/mile, which is like an efficiency penalty. We'll need to keep tweaking these.
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    I also want to share the points per response and their weights, but not sure how. Does anyone know how to embed a google sheet here?
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    eBike Range Calculators | Found a way to include the 'difficult range factors' - but it needs feedback!

    I built a few simple eBike range calculators last night in an attempt to include the 'impossible to account for' range factors, and spit out a more realistic battery capacity need and range expectation. Please give it a try and let me know if it makes sense and/or how we can improve it...
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    Bafang ultra,how strong is it.Does it overheat?

    sorry to switch us back to heat concerns, but I'm planning to regrease my Ultra - what grease are y'all recommending to keep this bad boy cool? I'm in TX so it's usually dry and summer highs are consistently over 100°F. I bought some Mobilgrease 28 mostly because the SHC100 wasn't available at...
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    Bafang ultra,how strong is it.Does it overheat?

    Awesome, that sounds like a great upgrade. I just reached out on their website contact form for details. What voltage are you running it at? Do you know if they'll do that upgrade with any Ultra or only motors purchased through them?
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    Start preparing for Daylight Saving Time now!

    https://www.youtube.com/watch?reload=9&v=-BfBxzuwYxM If you've been commuting to work or school for over a year then you are already well aware of the profound affect that the daylight saving time changes have on us. In the first week of March we roll the clocks forward at night and lose one...
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    Bafang ultra,how strong is it.Does it overheat?

    I figured out how to get the factory controller torque sensor settings setup nice for road commuting... gives a nice consistent power flow now. Here's my simple walk through vid: https://youtu.be/I4rBNGxSO7k Ultra G510 (stock controller 30A, 1560w) from Alibaba, Luna DPC-18 display, Luna Wolf...
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    Bafang Ultra Max Chain Alignment issues - help !

    Have you sorted this out yet? Looks like you have the fatbike chainwheel. I recently discovered they sell two versions, mtb or fat bike - looks like just two different interchangeable chainwheels? I also need to find Gates belt drive pulley, not sure if it's a Gates part or Bafang.
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    Old eBike cutting power after 2 seconds, need help

    Yeah that's what we're thinking, thanks Dan.
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    Old eBike cutting power after 2 seconds, need help

    My neighbor asked me to cleanup and sell their 2016 X-Treme Trail Maker e-bike. It appears to have been sitting through winter. The LifePo4 24v battery indicator shows full charge and reads 29.26v which held full charge overnight so far. The motor will run fine with no load (wheel off the...
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    Splicing higo 4-1 accessory cable

    Thanks for the response Dan. I'm actually trying to shorten the cable, not extend it. It seems that the safest and simplest option is to just splice the large cable between the controller connecter and 4-1 splitter. The wires inside it look like 26 awg so I had to order more white solder seal...
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    Splicing higo 4-1 accessory cable

    I need to splice the 4-1 higo accessory cable on my ebikekit front hub motor build because the cable is too long. The bike has hydraulic brakes so I'm not using the brake cutoff switches. I'm not sure if I should just splice before the 4-1 splitter and just keep the 2 extra cutoff plugs tied...
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