No, it's horsepucky. The car will throttle back to what the evse can supply.
On Sep 24, 2016 13:08, "ROBERT via EV" <[email protected]> wrote: > The statement shown below was posted. Can someone answer the question > does a 6.6KW charger demand all or nothing? > > > I would think that all well designed, UL or CE listed chargers are > designed for an input voltage of 100 - 264VAC (sometimes referred to as > universal or international input). If the 6.6 KW charger is a demand all > charger, the input current must increase at 120VAC vs 240VAC. For example, > Output KW = 6.6 KW , Input voltage = 240VAC, Efficiency = 80%. Then input > current = (6.6KW / 0.8) /240VAC = 34A. For 120VAC input, the input current > = (6.6KW/0.8)/120VAC = 69A. This is a rough calculation .... I know have > have not included power factor, current limiting, etc; however, it shows my > point. If I connect a 6.6KW charger to 120VAC, the input current increases > because the output is fixed. This being said, I think some if not all > onboard EV chargers adjust the charger out based on the input voltage thus > maintaining a 16A maximum input for 120VAC. I think this is the function > of the 1KZ output signal. It tells the car charger the maximum current it > can drawn from the EVSE. Th > e charger then adjust its PWM duty cycle to limit the output power of the > charger. This means that a car with a 6.6KW charger connected to 120VAC > EVSE only outputs approximately 120VAC * 16A * 0.8 eff = 1.5 KW. > > > ________________________________ > From: EV <[email protected]> on behalf of Bill Dennis via EV < > [email protected]> > Sent: Saturday, September 24, 2016 9:58 AM > To: 'Willie2'; 'Electric Vehicle Discussion List' > Subject: Re: [EVDL] Another J1772 L2 purchase > > I think that the J1772 spec has a 1kHz signal on one of its lines, the duty > cycle of which specifies the maximum charging current. So the device > you're looking at probably has a duty cycles of 25% or so, for around 15A. > > Bill > > -----Original Message----- > From: EV [mailto:[email protected]] On Behalf Of Willie2 via EV > Sent: Saturday, September 24, 2016 10:29 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) > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/ > attachments/20160924/cbe063b3/attachment.htm> > _______________________________________________ > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160924/639bcf5b/attachment.htm> _______________________________________________ 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)
