mvly wrote:If Lyen told you to set your Shunt to 1 miliOhms, then set it to 75V and you should be able to regen with 24s. Just make sure you set Regen Power to the lowest because it can really damage the FETs if you set it to anything higher than that. If you don't know what I am talking about, it's best to not set it and double check with Lyen for more help.
Why would it damage fets? The regen current limit is pretty low, and always lower than our forward current limits. Sure start with low, because a light regen is great for keeping speed under control going down hills without heating up and wasting your mechanical brakes. In flat land riding, gentle regen takes more getting accustomed to when you engage. The force of regen varies significantly by motor with speed winds having less force.
I have 2 ends of the spectrum in my regen settings. My cargo bike has extremely soft regen with it set on high, so soft that I modded the shunt just to increase regen force. On my SuperV, the controller has 12 shunt wires and the shunt resistance is so low that even with regen set to Low, I get over 70A of regen current, and when you hit the brake you better be ready, because it has very strong braking force.
It's your batteries that need to be able to handle regen. OTOH, if you're already running your controller near it's limits, then regen is work, so it's a good idea to get a feel for how stressed your controller before activating regen by seeing how hot it gets. Then compare that to how hot it gets using regen.
Also, I don't know if Lyen fixed his programmer, but regen has low. medium, and high. It's not Off/Low/High like the programming version I got from him has.
If you don't do much moderate throttle cruising, and regen force is mild with your motor, then I'd also suggest trying throttle activated regen. That's what I have on my cargo bike, and everyone who's tried it loves it. There's something appealing about the simplicity of twist to go, and let off to slow down. It is problematic trying to cruise at about 1/3rd speed though with the regen sporadically going off and on. OTOH I've gone entire rides without touching my brakes and there's something liberating in that simplicity.