The whole reason for the pilot signal (besides giving the connected-charging signaling) is exactly to throttle charging to what the *station* is capable of supplying, so any EV not accepting a station that can supply only 16A when the EV would rather charge at 32A, is contrary the spirit of the standard. It might be that there exist EVs which do not follow the standard, but I don't think a Nissan Leaf for example would have trouble throttling back. I do know that EMW (Electric Motor Werks) has tested throttling on many cars, as that is part of the solution they supply for demand control, leading to EV owners earning money by deferring charging. The way all charging stations throttle is by reducing the duty cycle on the pilot or by completely stopping charging for periods. I read the measurements they did on throttling back a Tesla during overnight charging - they found that at the minium charging current (I believe 6A) the Tesla battery did not gain any charge during an overnight session, because apparently the Tesla used almost all of the 1.4kW power delivered for running its circuits and possibly for temperature control. This means that chharging faster is often slightly more efficient although I have seen measurements of the Leaf, clarifying that it hardly makes a difference in efficiency whether it charges at L1 or L2.
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 http://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:[email protected]] On Behalf Of Willie2 via EV Sent: Saturday, September 24, 2016 9:29 AM To: Electric Vehicle Discussion List Subject: Re: [EVDL] Another J1772 L2 purchase On 09/24/2016 11:13 AM, Lawrence Rhodes via EV wrote: > Warning Will Robinson. The EVSE you selected are not good for modern EV's. Only 3.3kw. They may not work with 6.6kw chargers. Lawrence Rhodes It had not occurred to me that a 6.6kw charger would demand "all or nothing". Is that a possibility? That is, might a Leaf with a 6.6kw charger refuse to charge unless it was offered the full 6.6kw and would fail to charge at an EVSE that offered only 3.3kw? _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at 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 Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
