There is a theoretical physical limit for silicon based cells around 34% efficiency, so 20% for a whole module is quite good.
To get past 34% researchers have gone to multi junction cells and concentrators, but it isn't practical for our purposes. Even with that they've only gotten into the low forties. What we really need now is not more efficient modules but cheaper mounting hardware. Ground mounting is getting as expensive as modules. Hilton Dier III Renewable Energy Design Solar Gain, LLC Missisquoi River Hydro LLC _______________________________________________ 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
