I have a customer near the end of the line, and they have large voltage problems. They have an outback system, and when the voltage drops the inverter drops the grid and picks up the critical circuits. I saw this as a real problem where once or twice a day the system would run on battery and solar. So far the batteries have withstood, and the home owner loves the better electricity. I think it will runin the batteries, but it is saving the refrigerator, freezer, maybe some lights, the customer thinks it great.
I will look into this auto-buck-boost transformer. Darryl --- On Sun, 8/16/09, boB Gudgel <b...@midnitesolar.com> wrote: > From: boB Gudgel <b...@midnitesolar.com> > Subject: Re: [RE-wrenches] utility line voltage issues > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Sunday, August 16, 2009, 9:22 PM > Marv Dargatz wrote: > > Check out the following link. Just ONE example > of what the utility must deal with. > > > > http://tdworld.com/customer_service/power_new_technology_solves/ > > > > I'm not defending the utilities. They definitely > have their faults (argh, argh), but they have some severe > challenges that we are not always sensitive to. > > > > See Ya! > > > > Marv > > Enphase Energy > > 707 763-4784 x7016 > > > > In some cases, like for this flicker problem example due to > irrigation pumps turning on, it sounds like the ieee1547 > spec needs > to be able to relax somewhat to give the inverter time to > help out the brownout condition. > > I kind of doubt that the lineman will be fixing the problem > withing 2 seconds, the present disconnect time allowed, let > alone, > a small-ish grid tie inverter being able to even drive the > local transformer and/or neighborhood loads without REALLY > turning > off. I know... The spec is trying to protect > everything and everybody for every possible situation. > > Like Richard Perez once said in a radio interview with Art > Bell, "The grid needs your help". > > boB > > > > > > > > > William Miller wrote: > >> William: > >> > >> It was my understanding that in special > circumstances, inverter manufacturers are allowed to widen > the allowances for specific units. IIRC, a letter from > the utility was required. In some inverters, a change > of firmware with the more liberal settings does the > job. My memory is subject to verification. > >> > >> > >> William Miller > >> > >> > >> > >> At 10:06 AM 8/16/2009, you wrote: > >>> I'm beginning to wonder if the allowed voltage > range for grid-tie inverters (+/-10%) is too > >>> sensitive in some networks and contributes > more harm than benefit. This is close to home. > >> > ------------------------------------------------------------------------ > >> > >> _______________________________________________ > >> 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 > > _______________________________________________ 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
