August 26, 20241 yr Hello. Just finished motorising my road touring bike. I am looking to re-flash my controller and have been looking around for the amps limit for a BBS01B 250W 48v. This motor seems to get almost zero hits on Google. Is it an unusual configuration? I am looking to use the bike for commuting in a hilly city (Sheffield) and in the Peak District, sometimes with loaded panniers for camping. So, I want a slightly conservative Amp limit to protect the motor/battery/controller/whatever. Can anyone advise a suggested setting (and explain how it was arrived at). I have a 48v 20Ah battery too if that helps. All speed settings will be UK legal. Cheers
August 26, 20241 yr I don't have BBS01, but if I were you I would just try different settings starting with 15A (assuming you have decent battery). For me 16A is more than enough for every scenario.
August 26, 20241 yr I have a 48v 20Ah battery too if that helps. Do you have more information and a product link, so the battery experts can advise re: safe continuous current discharge? BBS01B 250W 48v I'd be interesting to read if the current limit of your controller can be increased. Unfortunately, [mention=19370]peter.c[/mention]'s isn't: The 48 v 250watt bbs01 is firmware locked to 12 amps max, not found away around this in a 12+month search mine is on without a throttle as well . https://www.pedelecs.co.uk/forum/threads/250w-bafang-kit-locked-down.45792/page-2#post-705774
August 26, 20241 yr Author The Motor: https://varstrom.com/en-gb/products/bafang-250w-48v-bbs01b The 48v 20Ah Samsung 217500 Hailong battery: https://varstrom.com/en-gb/products/48v-ebike-battery?variant=43141834637465
August 26, 20241 yr Author OK. Cheers for the heads up to the other thread [mention=33660]guerney[/mention]. I'm fine with the Amps being locked. The throttle is locked too? Some said that theirs were locked at 4 mph. Mine seems to be locked to motor cadence. I did change the settings on the 500c to 4 mph. In 1st gear (R34t x F44t) it is about 4 mph, i.e. walking speed. As I go through the gears I can get to about 10 mph on the flat. I only want to just cap it a walking throughout.
August 26, 20241 yr OK. Cheers for the heads up to the other thread [mention=33660]guerney[/mention]. I'm fine with the Amps being locked. The throttle is locked too? Some said that theirs were locked at 4 mph. Mine seems to be locked to motor cadence. I did change the settings on the 500c to 4 mph. In 1st gear (R34t x F44t) it is about 4 mph, i.e. walking speed. As I go through the gears I can get to about 10 mph on the flat. I only want to just cap it a walking throughout. I did manage to limit the throttle by specifying amperage and speed values for a pedal assistance level on my DPC18 display, and assigning the throttle to that level. How is on this thread somehere: https://www.pedelecs.co.uk/forum/threads/how-much-battery-sag-is-too-much-for-a-3-year-old-battery.47298/ (After the lights, the park, and the bit starring the cat) It worked, limited throttle speed to 6kph in use (usually a little over 4kph when climbing), but I don't think the BBS01B controller is terribly good at calculating low speed. Current control worked best, got me up hills very slowly. Hard to balance going so slow on a 20" wheeled bike, however. I've removed the throttle since, not needed. Edited August 26, 20241 yr by guerney
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.