Whoops, meant for another; posted here by mistake. Allan > On Jun 22, 2016, at 11:56 PM, Dan Fink <danbo...@gmail.com> wrote: > > Sorry, I don't understand the reference. > >> On Jun 22, 2016 11:24 PM, "Allan Sindelar" <al...@sindelarsolar.com> wrote: >> Ok, does that mean I should dial, oh, two of the ten digits of your number? >> ;^} >> >>> On Jun 22, 2016, at 11:17 PM, Dan Fink <danbo...@gmail.com> wrote: >>> >>> Dan; rough-and-tumble world indeed here off the grid! My understanding is >>> that Voc will still be additive, minus degradation over the years, but that >>> the larger Pmax modules will be current limited for Imp by the smaller >>> ones. So your 245w modules could only do 100w in the scenario you give. >>> >>> My solution has always been just stick with PWM controllers in these >>> situations. >>> >>>> On Jun 22, 2016 10:37 AM, "Daniel Tittmann" <dan...@greenwired.com> wrote: >>>> In the rough and tumble world of off grid system management for people who >>>> have been piecing together systems for years it is not uncommon for our >>>> company to come to a project and find many different types of solar >>>> modules. In most cases these modules are working fine and producing power >>>> but often have different output profiles. In an effort to upgrade >>>> systems and increase production I have often had the idea of building >>>> string of these different modules and feeding them into an MPPT >>>> controller. >>>> >>>> Can anyone out there explain if this would be a good idea or a bad one? >>>> >>>> Let say we have >>>> 4 x 100 watt 17.5 Vmp modules >>>> 2 x 245 watt 30.5 Vmp modules >>>> >>>> what would be the outcome of 2 strings of modules >>>> both with: 2 x 100 watt + 1 x 245 watt >>>> would this cause issues with the MPPT controller (say OB FM60) or the >>>> modules? Obviously you need to build strings that will fit the profile of >>>> the controller and not over to the series string rating and voltage >>>> tolerance of the modules but from a production standpoint where does this >>>> land? >>>> >>>> thanks for your advice >>>> Cheers- >>>> Daniel >>>> >>>> >>>> >>>> Daniel Tittmann >>>> CTO >>>> Greenwired >>>> www.greenwired.com >>>> dan...@greenwired.com >>>> 707-923-2001 (office) >>>> 707-206-5088 (Cell) >>>> >>>> _______________________________________________ >>>> List sponsored by Redwood Alliance >>>> >>>> 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 >>>> >>>> List-Archive: >>>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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: RE-wrenches@lists.re-wrenches.org >>> >>> Change listserver email address & settings: >>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>> >>> List-Archive: >>> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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