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    Off grid battery charging

    I'm looking to take my camper to non electric hook-up sites and am wondering how I might charge my ebike batteries, so fellow forumites, what might you suggest for this please? The camper does have a 12v 100Ah lead acid leisure battery but no solar panels. I know of inverters that convert...
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    AKM 100sx - stripdown-how?

    I have a previous Swytch motor (actually an AKM 100sx) and whilst it is running perfectly fine, I was out of idle curiosity wondering how it comes apart, should the need arise. Below are some pics taken from a sale listing for an AKM 100sx but physically it is identical in all respects to my...
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    PAS Sensor direction of rotation question

    As we all know the Pedal Assist System (PAS) sensor only produces an "I am pedalling" signal when pedalling forward but not when turning the cranks backwards (are there excptions to this?). I am idley curious as to how the sensor works out the difference between forward and backwards crank...
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    KT Controller C5 and C14 query

    So rumaging around Endless Sphere the best description of C14 is, quote, "With the LCD3, you can set C5 for 50-100% of the max current, and set C14 for weak,normal, or strong pedal strength. 'My question is what exactly does pedal strength mean e.g. does 'strong pedal strength' mean you have to...
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    PAS Sensor for Shimano Hollowtech 2 or Campagnolo Power Torque Systems

    Just sharing with the forum how I fitted a 12-magnet drive side PAS sensor to a Campagnolo Power Torque bottom bracket on a road bike which uses external bearing cups. I chose this type of PAS sensor for its aesthetics as it is very discrete. This idea is also suitable for Shimano Hollowtech 2...
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    PAS for Sprocket Rotation-query.

    After 2 years being very satisfied with my TSDZ2 machines I am out of curiosity in the process of doing my first (front) hub conversion to see what ebike life is 'on the other side' of the argument (hub vs mid drive). So only some of the items are with me as I await the slow boat from China but...
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    9mm drop-outs, 10mm hub motor flats - a query

    As we all know the flats on many if not all hub motors are 10mm across the flats whilst drop-outs are 9mm and therefore the drop-outs need widening by filing So my latest project is to fit an Aikema 100sx (courtesy of a redundant Swytch bike kit) likely across more than one bike and therefore my...
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    carbon forks and hub motors?

    Now I know there's been many a discussion on whether it is wise to fit a front hub motor to a bike with carbon forks, but here's the thing.... I met up with a cycling buddy who I've not seen for many a year and they now ride electric and has three bikes with the Cytronex C1 kit (link) a front...
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    Swytch motor varients

    Sometime soon I shall be looking for a used Swytch hub motor, ideally in a 26" wheel. Ebay seems as good a place to look as any - for instance, recently there was one in a 26" wheel but I was unsure of the coding, particulalry the 5XX bit as other wheels I've seen have had 6XX on them. So can...
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    Swytch Battery Questions

    A friend with a Swytch Bike made the fatal mistake of not charging the battery over the winter and now it won't charge up and pressing the battery level button doesn't illuminate any LEDs He has asked for my help - I'm no novice with ebike batteries having built three of my own, but this is my...
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    Cyclefest QE Country Park, HORNDEAN, Hants - 6th July 2024

    If you happen to live in Hampshire or West sussex, the Queen Elizabeth Country Park is hosting a Cyclefest on Sat 6th July (LINK) where there will be vendors with all sorts of ebikes to try out.
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    Battery Cell Autopsy?

    Thanks to invaluable input from forum members I now build my own battery packs My oldest pack, 15 months old (a 10s 2p using LG M50LT, 21700, 5000mAh) has been brilliant and has done maybe 60 full charge/discharge cycles? Imagine then my suprise when one day recently that it didn't power up A...
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    Bosch PowerTube 625 connector differences

    A friend has a Trek eMTB and he decided to buy a 2nd battery, a Powertube 625 (£600 - eek!) Anyway, imagine his dissapointment to find that whilst the batteries intially looked the same, the connector plates at the base of the batteries were a different shape and had different connector pin...
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    250 motor repairs a month

    A friend just sent me a link to an article in the Independent Guardian newspaper (link) discussing the high failure rate of ebike systems suffering from water ingress with the eBike Centre* in the New Forest saying they receive about 250 motors a month for repairs. The Bosch Gen4 gets a...
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    ebike light circuitry question

    I bought a couple of cheap front bike lights off AliExpress a couple of years back but have never fitted them (plenty of clip-on USB rechargeables already to hand), but out of curiosity I thought I'd power them up and was suprised to see that the higher the applied voltage the less total current...
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    TSDZ2 Final fitted position question

    I have installed a number of TSDZ2 motors and have always followed the fitting instructions whereby the motor is rotated to the rear of the frame to allow the fitting of the chainstay bridging block and plate (pic courtesy of @Woosh installation guide). In reviewing mid motors for my next...
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    Help! Hub Motor Parameter Questions

    Hub Motor Parameter Questions There are so many things I don’t understand about hub motors (Brushless DC aka BLDC and of the geared variety, not direct drive), so apologies for my meanderings but if you good folks could help me out here please? 1. RPM – when the RPM of the motor is given: >...
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    Help! Recommend me a front hub motor

    I’m looking to convert our tandem which is fitted with a Rohloff IGH and both bottom brackets are therefore eccentric. The eccentric clamps are castings on the underside of the BB which therefore excludes the possibility of a mid drive motor like the Bafang BBSxx series or Tong Sheng TSDZ2...
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    BMS - common port or not?

    Before I commence my next battery build I'm wondering whether to use a common port charge/discharge version or a separate charge port version? Apart from maybe the convenience of one vs the other as in reduced number of connections, space, size and so on, are there 'electrical' or other reasons...
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    Supplementary Battery Question

    I have two bikes each with a TSDZ2 (36v 250w) and a 10s2p battery (Pack A in the pic) that gives me around 45 miles in ECO mode and which I swap between the two bikes as needed. I am very pleased with the 10s2p battery (self built using twenty LG M50LT 21700 5Ah cells) and so I'm going for a 2nd...