I see this all the time when I go up to the ski hill. I start about 80% at the bottom, arrive with 40% or so and then when I get back down I am back to 60% (all rough figures but in the ball park). Without the recovery on the way down I would probably need to stop and charge on the way home. My smart ED gets about 100km / charge and one days I go up the mountain the estimator suggest my total range is more like 125 to 130 km so yes, up and down the mountain seems to be pretty much a zero sum option, expensive up but enough recovery down so my total range for the day stays about the same.
Regards, Lawrence Harris [email protected] > On Oct 23, 2017, at 12:19, EVDL Administrator via EV <[email protected]> > wrote: > > On 22 Oct 2017 at 21:02, davinder via EV wrote: > >> I am puzzling over how regeneration in ev charges the main battery. >> Plug in charging takes 8-10 hour charging to top up the battery - so >> when the vehicle is rolling down hill oe deaccelerating the 'charge >> energy' is avalable for seconds or minutes. > > Regenerative braking doesn't fully charge the EV's battery. It would be > great if it could -- drive for free! -- but it can't. You'll never recover > 100% of the energy you used to put the vehicle in motion. That's physics > for you. > > IIRC when you add regenerative braking, the typical increase in range (and > hence energy recovery) is around 20%. I've read that in hilly regions you > can get to 35%. > > To see this taken to an extreme, look here: > > http://www.evdl.org/pages/evergreen.html > > Over 20 years ago, Axel Krause of Brusa designed a light EV with efficient > components and aggressive use of regen. He drove it over the Apls, and > thanks to the regen, got essentially the same range he would have had if > he'd driven on flat ground! > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/help/ . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at 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/20171023/3d3ff734/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
