On 26 Sep 2014 at 19:44, Lawrence Rhodes via EV wrote: > I want my vehicle to be so efficient that the panels can run the vehicle at 30 > to 40 mph under bright sunlight. The Stella has an efficiency of 35 wh per km > which makes it possible to run on the panels alone.
There really isn't enough information here to judge the veracity of this "run on the panels alone" claim. One thing that's missing is the test conditions for that 35 Wh/km (about 58 Wh/mi). FWIW, though, the first-generation Solectria Force sedan (2100lb weight) could do just under 150 Wh/mi, at a steady 45mph. Also missing is any qualification for the claimed 1.2kW (or, in some publications, 1.5kW) PV output. Is that in full sun? At noon, when the sun is more or less overhead and providing maximum insolation to those (mostly horizontal) PVs? Is that an average from 10am to 2pm in San Diego? What would it be at 5:30pm when you're driving home from work? What if you're driving in Cleveland, Ohio, where there's a lot more cloud cover than in San Diego? There are some big problems with carrying your PV on your back in a car. 1. Your peak output will only be for a short time each day, when the sun is as nearly perpendicular as possible to the plane of the PV panels, and only when you're driving in the right direction, with no cloud cover, no trees, and no buildings shading the panels. The real world of driving a car where you want to go just doesn't mesh well with the way you get maximum power out of a PV system. 2. Weather is a problem. 3. Vandalism is a problem. You're going to park over $4k worth of PV on the streets of San Francisco? Seriously? While building an efficient EV is definitely a great goal and there may indeed be some good ideas for that in this design, I really think you'd be better off putting your PV on your house instead. Your call though. 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 For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
