And regarding backfeeding, that problem is obvious when using a genset that is incorrectly connected, but solar (especially the modern grid-interactive solar) can never backfeed due to the implemented double or triple protection against "islanding".
Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Michael Ross via EV Sent: Friday, May 01, 2015 4:59 PM To: Peter Gabrielsson; Electric Vehicle Discussion List Subject: Re: [EVDL] Tesla plugs into new market with home battery system Depending on how Tesla chooses to run and protect the packs, and the type of cell construction and chemistry, there is no reason for 5000 cycles to be unobtainable. I feel certain they will choose small cylindrical cells - which is a good choice for cooling, for resistance to expansion, automated construction (consistency). From previous commentary I have the impression they planned to cool stationary packs (who knows if that was primarily for residential or industrial application), they have clearly thought about it, and are as knowledgeable as anyone. I expect the utilities to be the biggest drag on the system. My friends at Duke Progress sell me cheap power ($0.097/kWh all day long), but they hate letting anyone have control in their stead. I am sympathetic from the POV of line workers, having been a utility tree cutter in my youth. You really want to know the lines are not fed from two directions. On Fri, May 1, 2015 at 6:37 PM, Peter Gabrielsson via EV <ev@lists.evdl.org> wrote: > I don't see TOU shifting quite working out financially, almost though. > > Example, my utility charges 46c/kWh peak rates and 11c/kWh off peak rates. > so essentially I save 35c per kWh that I shift, or $3.50 if I use the > 10kWh full capacity every day, ignoring losses. > > That's $100/month which gives a payback period of about 3 years. > > So far it sounds pretty good but after 3 years we've put 1100 very > deep cycles on that pack and it probably will need to be replaced soon. > > I guess the question is how long the pack lasts. > > > > > On Fri, May 1, 2015 at 2:10 PM, Ben Goren via EV <ev@lists.evdl.org> > wrote: > > > On May 1, 2015, at 1:43 PM, Cor van de Water via EV > > <ev@lists.evdl.org> > > wrote: > > > > > For people on ToU, the unit can make sense even without solar, by > simply > > load-shifting from > > > expensive hours to cheap (nighttime) tariff > > > > That is, indeed, how Tesla appears to be marketing this. > > Essentially, as > a > > way for homeowners to make money with electricity arbitration. > > > > It also shows how the current utilities are such bloody fools...they > > themselves are already the ones reaping the profits on exactly this > > type > of > > arbitration from people with solar panels who charge the grid > > on-peak and draw back from it off-peak. Even if you net out to zero > > and don't have a bill, the utility is still making out like bandits > > from you on the arbitrage. > > > > 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/20150501/3a9 > 584e1/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) > > > > > > > -- > www.electric-lemon.com > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150501/653 > 26b8f/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) > > -- To invent, you need a good imagination and a pile of junk. Thomas A. Edison <http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 585-6737 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell michael.e.r...@gmail.com <michael.e.r...@gmail.com> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20150501/02eadc1f/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)
