HI David, My point exactly.
> On Jan 27, 2025, at 1:35 PM, david quattro via RE-wrenches > <re-wrenches@lists.re-wrenches.org> wrote: > > 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 > <mailto: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 <http://www.recgroup.com/> | george.mcclel...@recgroup.com >> <mailto:george.mcclel...@recgroup.com> >> >> >> >> >> -----Original Message----- >> From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org >> <mailto: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 >> <mailto:re-wrenches@lists.re-wrenches.org>> >> Cc: jay <jay.pe...@gmail.com <mailto: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 >> <http://re-wrenches.org/> >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto: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. 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