Michel Jullian wrote: > 2009/9/17 Jed Rothwell <[email protected]>: > >> He did not mention any of the problems with photovoltaic devices such as the >> long energy payback time. > > Not any more Jed! It used to be a significant portion of the ~25 > years lifetime, but with new thin-film technologies it's only months > now: > > http://www.nanosolar.com/power-plants/ground-mounted > > "In fact, each Nanosolar panel pays back its lifetime energy usage > (including decommissioning) within 3 months of operation." > > The way they mount their panels on large flat rooftops is surprising, > it's an unusually low tilt design, see: > > http://www.nanosolar.com/power-plants/large-roofs
Beautiful!! Sticking a sail on the roof never appealed to me. So in exchange for some penalty in reduced power, they build you a system that's likely to outlive the gales of November, whether or not they come early. I like that. > > Michel >
