HI Peter, I agree with you that for now on residential it makes no sense. However for commercial that might have to pay extra for PF issues, to have the inverter adjust for this makes sense. Its the reason they( inverter companies ) are doing it. On Jan 6, 2011, at 2:34 PM, Peter Parrish wrote:
> I can't understand how any inverter WOULDN'T deliver its power with the > voltage and current 100% IN PHASE. > > When the voltage and current are not 100% in-phase that represents reactive > power. Reactive power flows positive for a quarter of the AC cycle, then > negative for a quarter of a cycle, then positive and then negative. The net > result over one AC cycle is ZERO power delivered to the load. > > So reactive power is worthless. > > Worse, it results in higher currents (and voltages) for the same amount of > in-phase power, putting additional stress on circuits. > > - Peter > > > Peter T. Parrish, Ph.D., President > California Solar Engineering, Inc. > 820 Cynthia Ave., Los Angeles, CA 90065 > CA Lic. 854779, NABCEP Cert. 031806-26 > peter.parr...@calsolareng.com > Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 > > > -----Original Message----- > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of August Goers > Sent: Thursday, January 06, 2011 1:25 PM > To: RE-wrenches > Subject: [RE-wrenches] Xslent? > > Hi All - > > Have any of you heard of the Xslent XPX-A1000 microinverter? > > http://www.xetenergy.com/#Tab-2_link-1 > > We're going up against them on a 10 kW system and I'm trying to figure out > if their claims about producing reactive power mean anything to us in the > real world. They are saying that their 6 kW system will outperform our 10 > kW system. > > I also noticed that their CEC efficiency is only 89%... > > Best, > > August > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
