Search results

Date Relevance Most replies

  1. L

    Solar setup for internal LED panels

    Morning, I've been in and around electric bikes for around 5 years, built a few, learnt a load about batteries and what is needed etc. I'm by no means an expert, but can work out the right battery and controller size etc for a certain motor blah blah. Anyway, the house I've been renovating is...
  2. L

    Q100H / 20A Sine Controller - Speed Sensor stopped working, display not registering MPH

    Hey, I've got a new project that is a q100h + PSW Power 20a sine controller. It's been working fine but this evening I've been tidying up the cabling a bit. Everything is back together but I've noticed the display (LCD3) isn't showing the MPH / speed no more. It's stuck at 0. I've tried a...
  3. L

    Extending battery cable with crimps, avoid?

    Hi, I have a new 52v 6ah battery that will be used at 20a max. The power cables are slightly too short so I've used some of the same cable (12 awg) and connected it with basic B&Q / Home Depot crimps. I have been shortening all the other cables by solder, but these 12 awg wires are like thin...
  4. L

    Single Speed Charge Plug Commuter – Q100H | 52v 6aH Battery

    This is my second electric project, the first being a lightweight road bike with a 48v 17.5aH battery and Q128C 210rpm rear hub. This was a fun bike to learn with but it was never quite the right combination. I've learnt that adding a massive battery and heavy (ish) rear wheel ruins the...
  5. L

    Correct size pins and bullet connectors for 9 pin motor cable

    Hey, I need to shorten the motor cable but I can actually just repin the cables instead of soldering. Anyone know the correct size pins and the bullet connectors that come on the normal motor cables from BMS etc? Same as below:
  6. L

    Q100H + 52v No load speed of only 19.3mph?

    Hey, I got my wheel back from yesterday from having a new Q100h fitted and last night got everything plugged together. It's a 260rpm motor, and I'm using a new 52v battery but my LCD3 display is showing that it tops out at 19mph under full throttle. Using the exact same controller and display...
  7. L

    Best solder for shortening cables? (PAS, Motor etc)

    Hey, New motor is being delivered next week and on of the issues I had on my last build was the extra length of wire I didn't need. All of the cables; motor, PAS, display etc are going to be shortened to make for a nicer build. I'm new to soldering, but watching some videos I don't think...
  8. L

    52v 6aH / Saddle bag battery for Q100H - Any changes for custom battery?

    Hi, I've posted about this before but wanted to separate into new thread. I've just ordered the bits for my new single speed Q100h build which is 260rpm 36v. My last project was a Q128C 36v and a 48v 17.5aH battery. My commute is 6 miles each way, the large 17.5aH didn't even go down a usage...
  9. L

    DeWalt DCB546 - What cell capability (amp draw) could they provide

    Hey, I'm naive to battery tech but getting a custom Luna Mighty Mini clone built soon for around £300 from a UK builder. Whilst searching online I came across these: https://www.screwfix.com/p/dewalt-dcb546-xj-54v-6-0ah-li-ion-xr-flexvolt-battery/2832p. Which are 52v / 6aH (same as the mighty...
  10. L

    UK plug charger for Luna Cycle Mighty Mini

    Hey, I'm close to buying the Mighty Mini but they don't stock a charger for the UK (220v 52v with a UK plug). I have no idea where to look for such a charger and what I should be looking out for price wise etc and also the right connections. Anyone able to point me in the right direction? No...
  11. L

    Can anyone confirm if the Q100h is 32h and will fit 120mm drop outs

    Hey, working on a new project and it has 32h rims and would like to keep them this time (has to go 36h last time due to Q128c). This is a single speed project so want to go down the 'h' route with a freewheel. The Q100 says its 32h but the Q100H doesn't mention it. Also, will this suit a 120mm...
  12. L

    Battery builder concerned over building a Luna Mighty Mini Clone

    Hey, I've just sold my large 17.5aH Shark 48v battery and have been looking to start a new lighter project. I'm going down the single speed route and re using my Q128C hub motor. I've been eyeing up the Luna Mighty Mini which is a 52v 6aH cube battery...
  13. L

    Which freewheel for a Q128H / Bafang BPM single speed project?

    Hey, looking at a new project and planning out the parts. I never change gear and sit on 34 front / 15 rear and this is perfect. I'm purchasing a new bike that I can strip the gears off and use as a single speed, for this reason i'll also be getting a q128h or a bafang BPM. What do I need to...
  14. L

    Does a motor keep providing assist even when it exceeds its winding speed?

    I'm running a Q128c (36v 201rpm) at 48v and get 22mph as its top speed but wondering what happens when I pedal faster than that? If going downhill at 22mph+ the throttle will not provide any assist and the display shows no watts being used, but, what happens if I'm on a flat ride and pedaling...
  15. L

    Options for a small (6-10ah) 48v battery

    Hey, had some issues with a road bike project so stepping back and reworking the setup. I'm replacing the broken q128c with a 36v 260rpm 500w Bafang CST and potentially a S12s controller but currently have a 20a sine wave controller. The main issue I had was the added weight of my battery...
  16. L

    Torque arms possible for these drop outs?

    Looking at a second hand bike for a winter single speed electric project and come across a cyclecross frame that can take 40+c tyres. The drop outs are a bit strange, which sort of torque arms would I need?
  17. L

    Estimating current battery usage

    Hey, I have a fairly lightweight build using a roadbike with a q128c. I've broken the q hub but upgrading to a Bafang 270rpm. My battery is a 48v 17.5aH GA cells from Insat Internation in the UK. The issue im having is that the extra weight from the battery is ruining the ride experience. Every...
  18. L

    What's the max capabilities of my battery with 25a cont. and 50a peak burst?

    Hey, I finished my first eBike project and have done a fair few miles on it so far. Im hooked! The commute to work is much nicer than a car. My bike is a road bike with a Q128c rear hub, 20a sine controller and 48v 18ah battery. However, I recently bent one of the connectors on the motor and...
  19. L

    Q128C Cutting out since knocked / bent connectors

    Hi, i've done around 100 miles so far on my q128c set up and its been flawless. Today however whilst fixing a puncture I knocked the connecters (don't ask) and a few of them bent slightly. It still fits in the connector slots correctly and initially everything seemed alright. However every so...
  20. L

    How to correctly estimate range and maximum power

    Hi, Theres still two bits of a maths / logic that I haven't got my head around. 1. I have a 48v 18.4aH battery and a Q128C + 17a controller. Whats the logic to work out far roughly range I have? The LCD3 display shows current output so I know that much? 2. How do you know the max power a...
  21. L

    Issues with indexing since swapping to electric hub and back again

    Hi guys, Long story short... I had a ribble road bike and purchased a q128c and a new rim that was laced onto it. I carried out the conversion and everything was fine apart from the fact I could only use the 2 larger cassette gears. I’ve taken the bike to a local bike expert who has been...
  22. L

    Any new ideas on a throttle with drop bars?

    Hey guys, My road bike project has undergone some changes and now looking to properly mount a throttle to the drop bars. I've googled a ton but haven't found anything yet that looks nice. My current throttle is the thumb throttle but cable tied to the right drop bar. Has anyone come up with a...
  23. L

    Torque arm options for these drop outs

    Hi, been looking at these torque arms I have over the past couple of days and can't see how they should fit best. The dropouts are bit of an odd shape and I can't get the longer arm to sit flush against the frame arm. However, there is a hole in the dropout angle that matches up exactly with...
  24. L

    Fitting PAS to square BB on road bike

    Hi, trying to figure out how to fit PAS to my road bike project. Here are both the sensors I have: I've taken off my crank arm and test fitted the lower sensor from the picture: I've then refitted the crank arm: Something about this feels incorrect? Its pushed the crank arm out and...
  25. L

    First Project - Ribble Road Bike [Q128C]

    After around a month of research I finally started my conversion last night. I have to credit 'D8veh' over on Pedelecs and 'molybdenum' from here for giving me plenty of advice! I have no prior knowledge or eBikes / electronics so its been a massive learning curve, if you notice anything I say...
Back
Top