On Dec 23, 2014, at 2:21 PM, Robert Bruninga via EV <ev@lists.evdl.org> wrote:
> 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. If battery A has half the efficiency of battery B, but battery A has a service lifetime of a century and battery B only has a service lifetime of several years, it's battery B with the abysmal performance per dollar. Unless, of course, battery B costs a tiny fraction of battery A, especially if battery C with superior performance to either A or B is expected to appear on the market by the end of battery B's lifetime. 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)
