Can I upgrade my bafang BBS02 48 V 500W to 750W in order to have more torque ?

[bandeiri]

Hello,
I'm new to this group so bear with me..
I've recently bought a bafang BBS02 500W 48V motor for a cargo bike but sometimes when I'm carring my kids i've some trouble going up hill. I could use a bit more torque... I read somewhere in the forums that basically my 500W version of the BBS02 is essentially the same motor as the 750W but with a controller that limits the current (A) to 18A. I got a programming cable and i've tried to increase the current to 25A to get that extra power... unfortunately my firmware doesn't allow me to go over 18A.

Here are my questions :
Can you confirm that the BBS02 48V 500W and BBS02 48V 750 are the same motors ?
Someone has access to a firmware that allows me to go over 18A ? Will I have any consequences if I upgrade my motor ?

Here's a picture of my motor.

 

[Guerney]

Have you tried setting "Keep current" to 100%?

This appears to be factory default, 60% is too low = 10.8A.

10.8A X 48V = 518.4W.


You want 100% of:

18A X 48V = 864W

I've recently bought a bafang BBS02 500W 48V motor for a cargo bike but sometimes when I'm carring my kids i've some trouble going up hill. I could use a bit more torque...

Even with my 36V "250W" BBS01B motor controller limited to 15A, I had no trouble dragging a combined weight of Homcom bicycle trailer + cargo + me + 20" wheeled Dahon Helios P8 2006 folding bike = 180kg+ up steep hills. It's even easier now with the controller set to 18A. Slow but never failed at 15A, faster at 18A. Here are my firmware settings, you can see "Keep current" is 100%, and I've been cautious above 15A, in case my battery explodes. My Level 1 is sufficient to overcome motor pedalling resistance. If you don't set "Keep current" to 100%, assistance starts high and diminishes quickly, in your case to 60% of 18A, which sounds practically useless for your purposes.





"Speeed" app screens, Google Play:

 

[Guerney]

15A was enough for my trailer hauling needs, even for hilly terrain. The only reason I increased the controller's current limit to 18A, was to stay further ahead of substance maddened Gremlins chasing me on foot late at night - all I did was cycle past a gaggle of Gremlins loitering outside a pub late one night after closing time, then alll of a sudden car headlights and an engine turned on, and the unhinged screeching and uphill chasing started. However, increasing the controller limit to 18A and using it to climb hills, results in a warmer battery. My battery is over three years and thousands of kms old - I should really stick to 15A and reserve the extra 3A for unpleasant emergency occurrings like this one, when a little more hill climbing speed would have made the substance maddened Gremlins chasing on foot uphill part of the situation a little less stressful. I'd need an entirely different bike to outrun the car. Fortunately, my bike looked too weird to steal.

Turn up volume. More amps make hills safer.