I think it can now be stated that the onboard charger will adjust to the output capacity limit of the EVSE. Therefore, only purchase an EVSE that is certified to the J1772 standard. Thanks for the answer to the question.
________________________________ From: gizm...@gmail.com <gizm...@gmail.com> Sent: Saturday, September 24, 2016 2:12 PM To: Peter Gabrielsson via EV; ROBERT Subject: RE: [EVDL] Another J1772 L2 purchase I can throttle my Kia Soul EV all the way down to 6A on either 120V or 240V input. It will also charge at up to 20A (the limit of my EVSE) on either voltage. As has been posted, that is one of the main points of the J1772 standard. I have not heard of any commercially available plug-in OBC not able to be throttled back by the EVSE. Sent from my Windows 10 phone From: Peter Gabrielsson via EV<mailto:ev@lists.evdl.org> Sent: Saturday, September 24, 2016 13:44 To: Electric Vehicle Discussion List<mailto:ev@lists.evdl.org>; ROBERT<mailto:bhensle...@msn.com> Subject: Re: [EVDL] Another J1772 L2 purchase No, it's horsepucky. The car will throttle back to what the evse can supply. On Sep 24, 2016 13:08, "ROBERT via EV" <ev@lists.evdl.org> 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 <ev-boun...@lists.evdl.org> on behalf of Bill Dennis via EV < > ev@lists.evdl.org> > 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:ev-boun...@lists.evdl.org] 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... 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