40a x 72v = 2880 Watts of power. This is 2880 Wh (Watthour) of energy in an hour. In that hour you go 40 mi, so your efficiency is 2880/40 = 72 Wh/mi This is very low for an EV, but that is also due to low speed. At Freeway speed your consumption per mile will be much higher. My truck can achieve about 15kW at 60 MPH, which means 1/4 kWh/mi. Most EVs are capable of going 3-5 mi per kWh, which means an efficiency of between 200-333 Wh/mi. But this is typically spec'ed in mixed driving with freeway and city driving cycle. In city most EVs shine due to great efficiency at lower speeds, combined with regen. Cor.
On Tue, Nov 12, 2019, 8:02 PM evtlfp20 via EV <ev@lists.evdl.org> wrote: > > I seen add on battery packs for cars and am surprised how small they > are, so that must mean watts per mile is way lower. > > My scooter uses 40 amps at 72 volt s and 40 mph . so whats my watts per > mile ? > > verses like a leaf at 40 mph ? > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > ARCHIVE: http://www.evdl.org/archive/index.html > INFO: 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/20191112/4710a282/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
