Hi Allan Backwoods has 190 watt 72 cell for good pricing.
They are roughly the same physical size as the 165's they have. Good luck Jay Peltz power Sent from my iPhone > On Dec 14, 2015, at 2:08 PM, Allan Sindelar <al...@sindelarsolar.com> wrote: > > Todd, thanks, but I rejected them. They'd be a traditional match as 36-cell > modules, but they're way expensive (nearly $2/W Dlr.) and it would take 6 or > 8 of them (140W these days) to get the ~kilowatt I'd like. It would work but > I'm trying to keep the cost down. > Allan > > Allan Sindelar > al...@sindelarsolar.com > NABCEP Certified PV Installation Professional > NABCEP Certified Technical Sales Professional > New Mexico EE98J Journeyman Electrician > Founder (Retired), Positive Energy, Inc. > 505 780-2738 cell > > >> On 12/14/2015 2:29 PM, toddc...@finestplanet.com wrote: >> how about two of these in series? >> >> todd >> >> >> >> >> On Monday, December 14, 2015 12:37pm, "Allan Sindelar" >> <al...@sindelarsolar.com> said: >> >> Wrenches, >> I enjoy the good feeling when I successfully integrate new with old - sort >> of a steampunk approach. Here's an example for which I could use the >> Collective Wisdom: >> >> A customer wants to upgrade a chronically small array on a maybe 10yo small >> off grid system done reasonably well by others. The array is four 165W >> Siemens (Solarworld) 72-cell modules on a top-of-pole rack, feeding an >> Outback MX60 controller on a 24V battery bank. To save cost in our rocky >> soil I'd like to add four large modern modules on a fixed ground mount rack, >> set fixed at latitude +5° for winter-focused gain. But most of the modern >> 72-cell modules use 156mm cells and are around 300W or higher. 1200W plus >> the existing 660W is 1860W, and that exceeds what the original MX60 is rated >> to handle. >> >> I know I could replace the controller with a Classic, but I wonder if >> there's a smaller compatible 72-cell module at a reasonable >> price. Any suggestions? >> >> I also think it would be best to use a module with a lower Vmp than I'd >> expect from the older Siemens modules, given that they're likely degraded a >> little in voltage over ten years (originally 35.3 Vmp rated). Does that make >> sense? So what if I used four 60-cell modules, expecting their higher >> current to pull the voltage of the original modules back a bit toward Isc. >> How much would that lose? I'll bet it wouldn't be much, and the >> cost would be low for the common modules, especially those with lower 240W >> rating or below. Again, any thoughts, please? And any suggestions of >> particular modules? >> >> Thanks, >> Allan >> -- >> Allan Sindelar >> al...@sindelarsolar.com >> NABCEP Certified PV Installation Professional >> NABCEP Certified Technical Sales Professional >> New Mexico EE98J Journeyman Electrician >> Founder (Retired), Positive Energy, Inc. >> 505 780-2738 cell >> >> >> >> >> >> Sent from Finest Planet WebMail. >> >> >> _______________________________________________ >> 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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