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Assuming normal lithium-ion batteries and assuming fully charged, I'd be happy to connect them in parallel up to 0.3v difference without that device. The difference would have to be about 2v before things start to get dangerous because that's the sort of sag you get when drawing normal current...

P2 is set to 6. Did you do that? have you got 6 magnets in your motor for the speed sensor? If not, the speed calculated will be 6 times as much and if you have your speed limit set to 15 mph, the motor will cut at 2.5 mph or as soon as the magnet passes the sensor. P3 should be set to 1 for...

I just found this: https://www.ebay.co.uk/itm/36V-48V24V-36V-250W-350W-Brushless-Motor-Controller-LCD-Panel-Kit-for-E-bike-1/133420824654?hash=item1f1080384e:g:iQQAAOSw1T1ezJR5

There's no point in continuing with this. Simple logic: The motor worked before the spin-out, afterwards, it didn't. Can anybody name a single failure mode related to that that wouldn't be a result of the wires shorting or breaking? If the wires shorted, they're damaged, Any repair of the...

The first thing is to list all your settings in the LCD. Recently, we had one set to the wrong phase angle.

I was only joking. The battery looks a bit tight, but it is a large frame, so it should be OK. It has a normal BB and normal shape around it, so a motor should slot straight in.

Whatever you do, don't try other combinations. If you get it wrong, you can wipe out everything. You shouldn't be messing about with these things without a meter. Show both sides of your throttle connector so we can see all the wires and their colours. Also show a picture of the controller with...

It looks fine to me. I'm going to outbid you.

You don't have to have a pedal sensor for the throttle to work. The colours are: Green battery voltage got LEDs on the throttle Red 5v power for throttle Black 0v ground White Throttle signal Yellow and Brown are the switch wires. With everything switched on, you must check with a meter...

Any of them are going to get nicked. I would say that none are suitable anyway, unless all your deliveries are to farms.

Definitely. How else will you know their voltage?

First a warning: A heavy battery in your pannier will soon wear through. It looks safe when you're stationary, but it bounces around when you're riding. If you must put one in there, make sure that it's wrapped in bubbewrap or similar and make sure that it can't bounce. You can put two...

You don't have a torque sensor.

Normally, it's the bike that gets stolen and the owner got left with just the charger. Can we see a photo of your bike so we can see it's not stolen?

It can be explained in simpler terms. The controller is firing PWM pulses of energy at the motor. Each individual pulse has a width, which you can call the current and a height, which is the voltage direct from the battery. The energy in each pulse is the width times the height. it's the total...

Bafang BBS** uses current control, not speed control on the PAS.

That's something else they've changed then. I wonder if they've changed factories.

Most controllers work the PAS with speed control, where you get a different speed limit in each level, but the same power.

It's a standard Bigstone C300 that used to be fitted to many different bikes including the Oxygen E-mate from around 2012. It's been replaced by more modern versions like the Bigstone C300S. Probably, other Bigstone LCDs would be compatible. You can buy a controller with an LCD for around £30...

By 59v, do you mean 14S? It takes a lot to wear those gears. forum member Cwah ran a high speed Q100 at 20 amps and 48v for some time in a bike that he never pedalled and did around 30 mph. when the motor was decommissioned, I disassembled it to find it full of rust and some wear on the gears...