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. I"ve heard a better more complete reason of course from Bill Brooks, who maybe can chime in.
sorry got away from me, jay peltz power 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 > _______________________________________________ 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
