On 29 Aug 2013 at 11:51, Zeke Yewdall wrote: > It seems like it's staying on till about 1.7vpc, and that's probably > not good for the batteries to drop below that, right?
The rule of thumb for lead is that you stop (or reduce load) when the battery voltage under load falls to 1.75 volts per cell. You hope that will prevent cell reversal. It doesn't always. As for where to go, I'd start with replacing the one battery that read low. That's probably just a quick fix, though. Some kinds of AGMs can deliver huge currents with aplomb and are suitable for fast, short range EVs. Others are hardly much better than the infamous flooded marine batteries that die in a few months of such use. But you don't say what the batteries are (or if you did I've forgotten). Could you remind us of such matters as vehicle weight, what batteries you're using, what motor, what controller? This is a Beetle, right? I'm pretty sure I remember folks back in the late 1970s and 1980s building Beetles with 72v golf car battery packs. They gave up the back seat to batteries, of course. However, I checked the EV Album (searched with startpage.com, as Evalbum search wouldn't work for me) and found only this one, I guess originally converted by Lawrence Rhodes : http://www.evalbum.com/1466 And another with 8v golf car batteries : http://www.evalbum.com/1689 David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
