Mini BMS there's no longer making their BMS headboards or sell boards. I looked on the eBay for BMS's and found one that could send information to an Android phone about the cells voltage's along with voltage of whole pack average voltage and current. They seem to be made for bicycles but they did have a 30 cell model. They can be programmed for different cutoff voltages and different amounts of cells. To control the shut-off when charging or discharging they use a bank of mosfets so the amount of power these transitions can handle is not up to what a car or a golf cart needs. I made a little relay board that uses their control to turn the relay off and on and have use them in a few battery packs for cars. They don't have a lot of balancing capability I believe 60 milliamps is the rating of current. The app for the telephone shows individual cell voltages and also data logs each individual cell voltage along with the average voltage of the whole pack and the charge discharge current. I bought mine from eBay for $100 and then contacted the original supplier who says if I buy 10 I can get a reduced price. I did a short YouTube video of one of these units hooked up to some cells that I'm charging from my solar panels. There are a few other videos on YouTube of this model but not a lot of information nor is there much information from the company , xiaoxiang . They say nothing of the data logging capability . https://youtu.be/Yj7a1wzpQGQ if this doesn't work you can just YouTube for my name Steve clunn. We have a few here now and I'm going to order more could use some orders to help fatten up the order if anyone is interested contact me offline from www.Greenshedconversions.com Steve Clunn -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20171226/e697a60b/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)