Jay you are right - that doesn’t make sense because with more PV, the system will reach “max AC out“ power sooner every morning and hold it longer into the evening
On Mon, Jan 27, 2025 at 12:20 PM George McClellan via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > Probably due to clipping. The panels are generating more energy than the > power electronics can process, so that excess energy gets cut off (or > clipped). It looks like a 1.2 ratio is optimal. > > George McClellan | Senior Manager, Technical Sales | REC Americas LLC > 735 Tank Farm Rd Ste 130 | San Luis Obispo, CA |93401 > <https://www.google.com/maps/search/735+Tank+Farm+Rd+Ste+130+%7C+San+Luis+Obispo,+CA+%7C93401?entry=gmail&source=g> > Cell phone +1 805 704 3226 | Fax +1 805 357 6104 > www.recgroup.com | george.mcclel...@recgroup.com > > > > > -----Original Message----- > From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf > Of jay via RE-wrenches > Sent: Monday, January 27, 2025 11:56 AM > To: RE-wrenches <re-wrenches@lists.re-wrenches.org> > Cc: jay <jay.pe...@gmail.com> > Subject: [RE-wrenches] PV watts question > > Caution: This is an external email and may be malicious. Please take care > when clicking links or opening attachments. > > > HI All > > I’m working with a customer who’s pretty savvy and is using PV watts for > his design. > > What I can’t figure out is the kwh/year goes down if he uses dc/ac ration > of 1.5 instead of 1.2 which is the default. > > Hes in Santa Fe NM. > > .8 ratio= 1663 kwh/yr > 1.0 ratio = 1668 kwh/yr > 1.2 ratio = 1671 kwh/yr > 1.5 ratio = 1623 kwh/yr > > I was expecting that more PV = more kWh/yr. > > What am i missing? > > > standard module > fixed roof mount > 14.08 loss’s > 10 degree tilt > 180 degrees > > > > jay > > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > > ________________________________ > > This message is private and confidential and may be privileged. Any > unauthorized use, dissemination of the information or copying of this > message is prohibited. If you have received this message in error, please > notify us immediately and remove it from your system. Thank you. > > ________________________________ > > This message is private and confidential and may be privileged. Any > unauthorized use, dissemination of the information or copying of this > message is prohibited. If you have received this message in error, please > notify us immediately and remove it from your system. Thank you. > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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