Hi: One thing to keep in mind with clipping, (module over sizing), is that if a system has 10%-15% off clipping, that will not affect total annual energy harvest and depending on dust and temperature conditions will likely even improve it.
Heres' a graph which shows the energy harvest graphically for a 250W module with a 250W inverter and a and 300W module with a 250W inverter. Please note the graph does not include any dust effects. To compensate for dust, the modules should always be of the order of 4% more powerful than the inverter, unless you plan on washing modules every month. Related to this, large commercial systems we have been supplying inverters to are 30-70% oversized as the sinking cost of modules makes the return on investment come out as maximized in that range of oversizing, JARMO _____________________________________________________________________________________ Jarmo Venalainen | Schneider Electric | Xantrex Brand | CANADA | Sales Application Engineer Phone: +604-422-2528 | Tech Support: 800-670-0707 | Mobile: +604-505-0291 Email: [email protected] | Site: www.Xantrex.com | Address: 3700 Gilmore Way, Burnaby, BC V5G4M1 *** Please consider the environment before printing this e-mail From: Drake <[email protected]> To: RE-wrenches <[email protected]>, Date: 02/10/2015 06:51 AM Subject: Re: [RE-wrenches] 300W 72 cell micro inverters Sent by: "RE-wrenches" <[email protected]> That would be at the 120% rating, so by rule of thumb, OK. I have a ground mount that has a ration of 1.15% with M-190s (figuring 199 W / inverter). It has quite a bit of clipping in the spring. It has optimized tilt for the location. A ballasted roof mount with a 10 or 15 degree tilt likely wouldn't have that issue. This system went in the spring of 2010, and has only had one M-190 failure out of 24, amazingly enough. At 10:22 AM 2/9/2015, you wrote: >What do you typically get out of a 300 watt panel for production when you >are grid tied? I know in theory (STC) it is a 300 watt module but we >rarely if ever (except in very cold weather)see near that for an output. I >use (as a general, 77 degrees F) design parameter, 77% for overall power >production output output. I'm sure you would get a little clipping, but I >guess a significant amount would depend on a number of variables on the >site, time of the year, weather conditions, etc. > >Daryl > > > > Yeah....if you're OK with a not insignificant amount of clipping going on. > > > > -----Original Message----- > > From: RE-wrenches [mailto:[email protected]] On > > Behalf Of [email protected] > > Sent: Sunday, February 08, 2015 2:33 PM > > To: RE-wrenches > > Subject: Re: [RE-wrenches] 300W 72 cell micro inverters > > > > Hey Jason, > > The M-250's work well with LG 300 watt (60 cell) modules. > > > > Daryl > > > > > >> Hi Jason, > >> > >> The Enphase C250 Microinverters for three-phase commercial > >> applications does work with 72 cell modules. > >> > >> On Sun, Feb 8, 2015 at 12:58 PM, Jason Szumlanski < > >> [email protected]> wrote: > >> > >>> The ABB micros seem to be solid and easy to install. We have two > >>> sites with them with no issues. Unfortunately, the monitoring system > >>> sucks compared to Enphase and was far more difficult to set up. I > >>> really wish Enphase would come up with a good 72 cell option because > >>> we find ourselves competing with 300W modules occasionally, and > >>> consumers (irrationally) jump to the conclusion that bigger is > >>> better. > >>> > >>> > >>> [image: Logo-Sq-80.png] > >>> > >>> Jason Szumlanski > >>> > >>> Principal Solar Designer > >>> > >>> Florida Solar Design Group > >>> > >>> (239) 491-8010 office > >>> > >>> (239) 410-4985 mobile > >>> > >>> Authorized Sales Agent for Fafco Solar > >>> > >>> [image: Fafco-Solar-Enphase-Logo.png] > >>> > >>> License CVC56701 > >>> > >>> > >>> On Sun, Feb 8, 2015 at 3:15 PM, Bill Hennessy <[email protected]> > >>> wrote: > >>> > >>>> Hi folks-- > >>>> > >>>> We're planning a micro inverter install using 300W 72 cell modules > >>>> for an area with a fair amount of shading. The choices we've found > >>>> are ABB micro > >>>> 0.3 or APS YC500A. > >>>> Any stories to tell about either of these or another suggestion? > >>>> > >>>> Thanks for your time. > >>>> > >>>> Bill Hennessy > >>>> Berks Solar, LLC > >>>> 371 Centennial Rd > >>>> Mertztown, PA 19539 > >>>> > >>>> o 610 682 4300 > >>>> c 484 560 4666 > >>>> NABCEP certified installer > >>>> PA contractor #44411 > >>>> www.berkssolar.com > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> > >>>> _______________________________________________ > >>>> List sponsored by Redwood Alliance > >>>> > >>>> List Address: [email protected] > >>>> > >>>> Change listserver email address & settings: > >>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >>>> > >>>> List-Archive: > >>>> http://www.mail-archive.com/[email protected]/mailli > >>>> st.html > >>>> > >>>> List rules & etiquette: > >>>> www.re-wrenches.org/etiquette.htm > >>>> > >>>> Check out or update participant bios: > >>>> www.members.re-wrenches.org > >>>> > >>>> > >>>> > >>> > >>> *Florida Solar Design Group is not an engineering or architectural > >>> firm and acts only as a consultant and authorized independent sales > >>> agent. > >>> Any > >>> advice or work product provided shall not be considered licensed > >>> professional services provided under Florida Statute Chapters 471, > >>> 481, or > >>> 491.* > >>> _______________________________________________ > >>> List sponsored by Redwood Alliance > >>> > >>> List Address: [email protected] > >>> > >>> Change listserver email address & settings: > >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >>> > >>> List-Archive: > >>> http://www.mail-archive.com/[email protected]/maillis > >>> t.html > >>> > >>> List rules & etiquette: > >>> www.re-wrenches.org/etiquette.htm > >>> > >>> Check out or update participant bios: > >>> www.members.re-wrenches.org > >>> > >>> > >>> > >> > >> > >> -- > >> > >> Cordially, > >> > >> Nick Soleil > >> *Enphase Energy* | Field Applications Engineer > >> > >> office 707-763-4784 <%28707%29%20763.%204784> x7267 cell 07-321-2937 > >> > >> <http://enphase.com/> > >> > >> *Powering What’s Next*™* | *The Enphase Energy Management > >> System > >> <http://ow.ly/HbVS3> <http://community.enphaseenergy.com/> > >> <http://facebook.com/EnphaseEnergy> > >> <http://twitter.com/Enphase> > >> <http://linkedin.com/company/enphase-energy> > >> > >> > >> NABCEP Certified Solar PV Installer #03262011-300 > >> > >> California C10 Licensed Electrician #986315 > >> > >> Texas Master Electrician #284451 > >> > >> <[email protected]> > >> > >> “Don’t get me wrong: I love nuclear energy! It’s > >> just that I > >> prefer fusion to fission. And it just so happens that there’s an > >> enormous fusion reactor safely banked a few million miles from us. It > >> delivers more than we could ever use in just about 8 minutes. And > >> it’s wireless!†> >> > >> - William McDonough > >> > >> > >> > >> This email message is for the sole use of the intended recipient(s) > >> and may contain confidential and/or privileged information. If you are > >> not an intended recipient, you may not review, use, copy, disclose or > >> distribute this message. If you received this message in error, please > >> contact the sender by reply email and destroy all copies of the original > >> message. > >> > > _______________________________________________ > >> List sponsored by Redwood Alliance > >> > >> List Address: [email protected] > >> > >> Change listserver email address & settings: > >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >> > >> List-Archive: > >> http://www.mail-archive.com/[email protected]/maillist > >> .html > >> > >> List rules & etiquette: > >> www.re-wrenches.org/etiquette.htm > >> > >> Check out or update participant bios: > >> www.members.re-wrenches.org > >> > >> > > > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > List Address: [email protected] > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://www.mail-archive.com/[email protected]/maillist.html > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > > www.members.re-wrenches.org > > > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > List Address: [email protected] > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://www.mail-archive.com/[email protected]/maillist.html > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > > www.members.re-wrenches.org > > > > > > >_______________________________________________ >List sponsored by Redwood Alliance > >List Address: [email protected] > >Change listserver email address & settings: >http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > >List rules & etiquette: >www.re-wrenches.org/etiquette.htm > >Check out or update participant bios: >www.members.re-wrenches.org _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. ______________________________________________________________________
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