I don't think that swing is from discharge to charge but rather a big change in voltage depending on state of charge. I.e an electron in at 70 volts might come out at 55 if soc is 90% but in at 45 volts comes out at 36 volts if soc is 20%. But, I haven't really seen any data on them for sure, and have never used them myself. Seems like there is a lot of marketing and not much solid engineering data on them yet.
Z On Tuesday, December 23, 2014, Robert Bruninga via EV <ev@lists.evdl.org> wrote: > Efficiency... > > > The aquair batteries... have an even wider swing-- > > something like 36 to 70 volts... > > Giving them terrible efficiency. That's almost 50%. Given that an > electron-in to charge at 70 volts comes out at 36 volts is a 50% loss of > "power" and hence efficiency. Such batteries are great for standby back > up systems where efficiency is of no concern. But for a daily solar > cycle, adds another 50% loss factor on top of an already abisymal 30% > performance per dollar. > > > Bob, WB4APR > > On Tuesday, December 23, 2014, Ben Goren via EV <ev@lists.evdl.org > <javascript:;>> wrote: > > > On Dec 22, 2014, at 7:09 PM, Jan Steinman via EV <ev@lists.evdl.org > <javascript:;> > > <javascript:;>> wrote: > > > > > Flooded cell NiFe have a fairly high internal resistance and, as you > > note, a large voltage swing. But they are the champs when it comes to > > longevity. > > > > Does that voltage swing require special inverters, etc., to use them > > in something like an off-grid function? Or is it likely to "just work"? > > > > b& > > _______________________________________________ > > 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) > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141223/81254e > 23/attachment.htm> > _______________________________________________ > 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) > _______________________________________________ > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20141223/3c5df0ae/attachment.htm> _______________________________________________ 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)
