“ Today's PV is cost-effective primarily when you have several of the following conditions true: (a) High retail electricity rates (e.g.... (read full comment) ” 

Posted on October 3, 2007 at 7:46 PM EDT

“ Here's one company attempting to make a residential scale solar thermal product: http://www.sunmachine.com/english/sm_solar.htm (read full comment) ” 

Posted on September 29, 2007 at 10:33 AM EDT

+ 5 more comments posted in this discussion

“ What to do with H2? Even if we could generate H2, the question is what to do with it? It turns out to be a lousy transportation fuel, as a quick... (read full comment) ” 

Posted on September 29, 2007 at 2:20 AM EDT