To give an illustration of how high the need is for fast charging: I have at least 3 L2 chargers since 2 years and I have not installed any of them yet, since overnight L1 charging is more than I need for my daily driving needs. Of course, I plan to install at least one L2 station later this year when I am pulling wire from the service panel anyway to a small load center in my garage, so I will have an AC disconnect for the solar inverter and the presence of a load center allows me to add an RV style NEMA 14-50 outlet to plug in a L2 charger. Any time that I come home with batteries depleted and still needing to make a long trip, well - those times I will hop into the Prius. But I rarely drive the Prius and I do use my EV truck on a daily basis, so that should tell you a bit about the sufficiency of L1 charging.
P.S. and yes, I occasionally need to get creative with charging while I am running about, but the great thing about L1 is that every single house, office, school and other meeting place is actually equipped with these outlet that allows recharging using a simple 100ft extension cord. Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Jamie K via EV Sent: Wednesday, May 13, 2015 12:45 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Supercharging is not the way. The assumption of what "nearly everyone needs in a day" is based on averages, right? Averages are built from data ranging from minimums to maximums. But real range needs are based on maximums. So it would be erroneous to assume that averages define the actual range needs of most people. Further, it matters how often people need to hop in the car and run an errand, handle an emergency or drive to the next town. Faster L2 charging frees up the car for more trips in a day, and L3 opens the portal to nearby intercity trips. Supercharging opens the portal to interstate trips. All of these charging options make an EV that much more practical. For the Volt there's a 300 mile generator included, so it's OK to design for "most trips." But for a BEV, the driver must consider the maximum trip required or have another vehicle to pick up that slack. Cheers, -Jamie On 5/13/15 1:08 PM, Ben Goren wrote: > On May 13, 2015, at 11:51 AM, Jamie K via EV <ev@lists.evdl.org> wrote: > >> Ben, on the subject of L1 chargers being good enough for nearly everybody >> and L2 being overkill, I would ask "based on what data"? > > Sorry...I had in mind overnight home charging, with the assumption that the > 20 kWh you get from 12 hours @ 110V / 15A is going to be good enough for as > many miles as nearly everybody is going to need in a day, especially given > the types of efficiency figures we're headed towards and that Lawrence was > advocating. At 250 Wh / mile, that's 80 miles. Even at 500 Wh / mile, that's > still 40 miles, the range that Chevy targeted for the Volt as "almost good > enough for 100% electric for almost everybody." > > Yes, there will be exceptions...but how many people regularly drive more than > 40 miles in a day, and, of those, how many are going to want to do so in an > EV that's only doing 500 Wh / mile? > > Even more important...how many people are going to want to spend lots of > extra money on an at-home fast charger if overnight L1 charging always leaves > them with 80 miles more in the morning than they had at the end of the day > before? > > b& > _______________________________________________ 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) _______________________________________________ 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)
