Leaf power level demands at 55 mph are easily 4 mi/kWh or 250 Wh/mi (or 13.75 kWh/55 miles at 55 mph).
It would be awesome if Leaf energy consumption was as low as you mentioned but most owner experiences indicate otherwise. With your numbers a Leaf could easily do 150 miles. Many owners get 40-60 miles in older Leafs and 80-100 miles in newer 30 kWh models. 2011-2017 Leaf motor is rated at 80 kW power. On December 28, 2017 11:31:41 PM CST, ROBERT via EV <ev@lists.evdl.org> wrote: >What? To maintain a small car like a Leaf at 55 MPH only requires about >10 - 12 HP. This is only 7.5 KW (10HP) - 8.9 KW (12HP). The battery >in the Leaf is rated at 30 KW-Hr. At 55 MPH it does not require all >the power in the battery (30KW-Hr). It only requires 7.5KW-Hr - 8.9 >KW-Hr to maintain 55 MPH. A solar panel system that could replenish >this energy plus conversion losses would keep the car going and the >battery level at a its current level of charge because the solar panel >system would run the car. > > >________________________________ >From: EV <ev-boun...@lists.evdl.org> on behalf of Marc de Piolenc via >EV <ev@lists.evdl.org> >Sent: Thursday, December 28, 2017 9:39 PM >To: ev@lists.evdl.org >Cc: Marc de Piolenc >Subject: Re: [EVDL] Solar trailer > >You're getting power and energy mixed up. >Your Leaf has a POWER rating of 30 kW, which means that (at full power) >it consumes 30 kW-hours of energy per hour. >It does not get 4.5 miles per kW because a kilowatt is a unit of power, >not energy - maybe 4.5 miles per kWh which is roughly consonant with >its >power rating and speed. >To support that speed without dipping into batteries, you need a solar >array that constantly produces 30 kW, which at 20% efficiency, >receiving >100 watts per square meter, will require 300/.20 square meters of solar >photovoltaic panels, or 1500 square meters. Not easy to tote around. > >It is safe to say that you cannot generate enough juice to recharge >while driving. > >On the other hand, having a much smaller array can still allow your car >to recharge while it is parked in the open, and that might be >worthwhile, depending on your application. This would work if you have >a >short commute, followed by the car being idle for nine hours or so in >broad daylight in a sunny climate. > >Marc de Piolenc > >On 12/28/2017 11:52 PM, ev-requ...@lists.evdl.org wrote: >> My math is good enough to figure out I get about my 30kw Leaf gets >4.5 miles per kw at 55mph more or less depending on wind.? What I'd >like to know is what size solar panel would be needed to support that >speed.? Now don't tell me it can't be done.? I just want to know the >formula for figuring it out.? My puny brain exploded when I thought of >all the variables.? I do know that a 3000 watt system would charge my >car in 10 hours.? I would just like to know the numbers of what would >be needed for continuous power at speed.? I guesstimated it would be >about 10000 watts.? I'd just like the exact number.? Thanks,? Lawrence >Rhodes...the point is to build a teardrop solar range extender/RV that >could charge while driving. > >-- >Archivale catalog: http://www.archivale.com/catalog >[http://www.archivale.com/catalog/images/header.gif]<http://www.archivale.com/catalog> > >Archivale<http://www.archivale.com/catalog> >www.archivale.com >Archivale is your Internet Gateway to Technical Information. Search, or >browse our site by topic to find the information you need, at a price >you can afford. > > >Polymath weblog: http://www.archivale.com/weblog >Translations (ProZ profile): http://www.proz.com/profile/639380 >Piolenc - French to English translator. Translation services in >Automotive / Cars & Trucks - aeronautics, propulsion, lighter than air, >power, intelligence, espionage, military, engineering, nuclear, >chemical, mechanical, civil<http://www.proz.com/profile/639380> >www.proz.com >(Translator Profile - Piolenc) Translation services in French to >English (Automotive / Cars & Trucks and other fields.) > > >Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc >Ducted fans: http://massflow.archivale.com/ >[http://massflow.archivale.com/jh2_2.gif]<http://massflow.archivale.com/> > >Mass Flow<http://massflow.archivale.com/> >massflow.archivale.com >Other Ducted Fan and Shrouded Propeller Links [No endorsement by Mass >Flow is implied!] Smitty Hairplane Company (a "baby jet" with >auto-engine-driven fan) > > >_______________________________________________ >UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >[http://www.evdl.org/images/evdl.jpg]<http://www.evdl.org/help/index.html#usub> > >EVDL Subscription Information and >Help<http://www.evdl.org/help/index.html#usub> >www.evdl.org >About the EVDL: The Electric Vehicle Discussion List, founded in 1991 >by EV enthusiast Clyde Visser, is an active and vital source of >information and help for people ... > > >http://lists.evdl.org/listinfo.cgi/ev-evdl.org >EV -- Electric Vehicle Discussion List - lists.evdl.org >...<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> >lists.evdl.org >The Electric Vehicle Discussion List is a forum for discussing the >current state of the art and future direction of electric vehicles >(EVs). 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