Excellent points. All renewable installations have to have this sort of accounting. Building for peak use is often unreasonable.
On Tue, Jul 8, 2014 at 11:05 AM, Robert Bruninga via EV <[email protected]> wrote: > > I don't know if your metric is the right one to use, but for the Tesla, I > > think that using the 85 kWh battery as a more robust solution is what I > > would use. > > For an extra $500 per hour for a 30 minute highway charge? I don’t think > so. > > The smart EV driver who understands the real value-promise of EV's where > they do best (overnight charging and daily use) actually looks for the > smallest battery that meets their routine needs, not the biggest. For > example, is it worth an extra $26,000 to be able to go an extra 57 miles > between charges on the highway? > > Example, A weekly trip from Washington DC to say New York city (226 mi) in > a > 85kw car (265 mi range) will not need to charge along the way in good > weather, but will need to charge immediately on arrival. The driver of a > 60 > kW battery (208 mi) would have to charge once along the way for say 20 > minutes but then not have to stress over finding a charger immediately on > arrival. His cost? An extra 30 minutes. > > At 52 trips a year, (52 hours of charging along the way) works out to be a > cost of $500 per hour. Of course this goes down the longer one owns the > car, but paying an extra $1000 per charge to save 30 minutes once a week is > not economical to many people. Sure, to those that can afford it, the > price > is insignificant , but they are not the ones who will be the primary > purchasers of mass EV's. > > Bob, WB4APR > _______________________________________________ > 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) > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." 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) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140708/5de55011/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)
