Frank L

iTrader: (148)

I have a 4s 2200 mAh lipo and I am looking for a voltage cut-off device and also what is the actual cut-off voltage?

Duster_360

iTrader: (21)

Low voltage cutoff is based on a cell minimum voltage of 3 - 3.2v, so a 4S cutoff would be 12-12.8v, 12.0v would be a minimum and would have no safety margin. Since this is a small capacity lipo, I'd sues somethimng like 12.2-12.3v to have a little safety margin.

Here's a 4S lvc -

http://www3.towerhobbies.com/cgi-bin...?&I=LXPGN1&P=7

trdsupra88

iTrader: (25)

I set the LVC on my 4s packs to 14.1 and that seems a lil low because the car slows down before it even reaches that...

Duster_360

iTrader: (21)

You mean 12.1v??

I've not run a 4S yet, I use 6.2 - 6.4v for 2S. If I used the same thing per cell, that would be 12.4 - 12.8v. 12.8v seems kinda high.

What pacs are you running - sounds like your car is stressing them pretty good.

trdsupra88

iTrader: (25)

The car loses power at 14.5ish...they are elite 4s 4800s...works fine for me...

Rc8.2e

I run 1/8 buggies and on my 4s, my lvc is around 3.3-3.4 volts.

fat500

iTrader: (51)

I have a hWing SCT speed control I have the auto cut off set to auto but it won't cut off the lipo in my e-buggy off at a safe voltage it will run it down until dead. What should i set at. Tks

Cain

iTrader: (294)

If it has the ability to set a hard total voltage cutoff, then do that instead. I don't really like relying on the speed control to correctly detect the voltage per cell, if you get a weak cell and one that is high you can get issues with overdischarge on the weak one.

So all that said, if it lets you set a hard voltage value, in general for 4S I did a minimum of 3.2V per cell, which works out to 12.8V or just do 13.0V and call it good. I have done alittle higher in higher draw situations like E-Truggy, 3.5V per cell or 14.0V. Packs held up much better in those situations.

fat500

iTrader: (51)

Thanks...Exactly what I needed