Don't forget that Tesla promises a 10-year (!) warranty on the PowerWall, so it is not like it will die in 2 or 3 years from daily cycling, just like your Roadster or Model S will not need a new pack any time soon.
Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: [email protected] Private: http://www.cvandewater.info Skype: cor_van_de_water XoIP: +31877841130 Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 -----Original Message----- From: EV on behalf of Ben Goren via EV Sent: Fri 5/1/2015 4:24 PM To: Lee Hart; Electric Vehicle Discussion List Subject: Re: [EVDL] Tesla plugs into new market with home battery system(backup foolishness) On May 1, 2015, at 4:02 PM, Lee Hart via EV <[email protected]> wrote: > You'd also murder a lithium pack in a few years, if you deeply discharged it > every day. Not if you've got a smart BMS that prevents you from murdering it and instead reports that the battery is empty regardless of how much remaining charge there is when you'd damage it if you discharged it further. As evidence...see all the Teslas on the road with nary a report of an underperforming battery and lots of reports of batteries significantly outperforming projections. > You have to select the size and type of battery according to the application. > Some will be best served with lead-acid, some nickel-iron, others lithium etc. That's true today...but I don't think it will remain true much longer. Lithium is probably already at the 80/20 rule for technical performance compared with nickel-iron...and it's a lot cheaper. It's more upfront capital than lead-acid...but has such a longer lifespan and better performance that lead-acid's days are numbered as well. The real clincher is that there're huge opportunities of scale ramping up for lithium for vehicular batteries. Maybe lithium isn't the ideal technology for other settings...but, if lithium is "good enough" for those settings, its ubiquity and increasingly-cheaper price are going to make it the de-facto chemistry of batteries in basically any setting save for a few niches. ...and lithium has some perks going for it for the home, as well. Tesla's marketing materials show their new batteries hanging on the wall just like a breaker box or an inverter. Try doing _that_ with lead-acid! b& -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: Message signed with OpenPGP using GPGMail URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150501/18372ee8/attachment.pgp> _______________________________________________ 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 -------------- A non-text attachment was scrubbed... Name: not available Type: application/ms-tnef Size: 4560 bytes Desc: not available URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150501/4ac58360/attachment.bin> _______________________________________________ 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)
