@surfdado is this tutorial still up-to-date? Or does it need an overhaul?
I updated it on 8/1. Besides new motor and battery options, very little has changed over the years. It works
These values have been community standards for a while, but I will defer to members like Dado who have edited this post over the years. These are absolute cutoff values to protect the battery, not the riders, and will cause a nosedive, higher value will cause a nosedive sooner.
These values do not control tiltback, it’s last resort to protect the battery from damage. You should never get close to these values if LV tilt back is set correctly and you respect it
Again, your values are incorrect according to @surfdado and @theboardgarage.
Motor Cfg > General > Voltage Tab:
Battery Voltage Cutoff Start (2.7-2.9V/Cell):
Stock XR = 40.5-43.5V
Stock GT = 48.6-52.2V
20S2P = 54-58V
Battery Voltage Cutoff End (2.5-2.75V/Cell):
Stock XR = 37.5-41.25V
Stock GT = 45-49.5V
20S2P = 50-55V
High/Low Voltage Threshold (4.3V/Cell & 3.0-3.2V/Cell) *3.2V/Cell for older batteries
I’ve been using these settings with no problems with the various builds I’ve made. I’ve built my configuration guide based on pev.dev and picking the great minds of @surfdado @NicoAleman & @theboardgarage to protect the battery. If I’m wrong then I’m wrong.
I don’t really understand the flow of conversation or who’s saying what, but I recommend that the “cutoff” values be well below any tilt back values.
Pushing into tilt back causes more voltage sag, and if the cutoff values are too close to that, then the motor will throttle and then stop accelerating, leading to a fall.
I usually advise “cutoff start” to be about 2.3v (or 2.5v if you’re very concerned) per cell. These are values that the battery should not really get to.
I’ll usually advise to set “cutoff end” to 2v per cell. For the same reasons above.
This is stuff that’s explained (both numbers and rationale) in my older videos.
I also talk about the lower end of the voltage range in my recent balance video:
I hope they helps explain/demonstrate what the lower end of the charge area looks like.
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I see the confusion as Dado recommends these higher values in his last video. I’m sure both can be correct in some way, but I feel it’s best to remain with what has been in this guide for years, which probably came from Mario given his expertise is in batteries. Anyone reading this is free to choose the higher values dado and @Drumbeater82 suggest if they choose.
@Drumbeater82 I originally wrote this almost two years ago from notes as a checklist to help me not forget values and steps without searching multiple post or videos every time I did a motor config. At this point, it’s no longer mine. it has been modified and updated many times by the same people you tagged in your reply so I feel it’s been pretty well vetted and beyond my knowlege. I’m not saying it’s absolute and do appreciate your input.
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Thanks @theboardgarage for the clarification. I went with @surfdado recommended cutoffs but have added your settings to my configuration guide to use either settings.
Hey guys! In case you want to edit the guide, you should see an Edit button at the bottom of the first post. We made the post into a Wiki so that edits are allowed by Users who are in the @vesc-experts user group.
Thanks @rene_the_hacker. To editors- I suggest keeping this guide as simple as possible. It has already become bloated which makes it more difficult to use for its original purpose. Information like different battery and motor values or crunch & field weakening should be their own posts that are linked IMO.
@surfdado Instead of listing all the values, should be maybe just reference the new VESC Tool Config Helper and incorporate it into the tutorial?