flynfrog wrote:
look up the energy payback of PV Cells and you can see why this is a terrible idea. Most of them take more energy to produce then they can payback before they are written off.
Well, as it turns out, I did look it up.
The question
is, did you? Take a look at this:
Life-cycle analyses show that the energy intensity of typical solar photovoltaic technologies is rapidly evolving. In 2000 the energy payback time was estimated as 8 to 11 years[79], but more recent studies suggest that technological progress has reduced this to 1.5 to 3.5 years for crystalline silicon PV systems[73].
Thin film technologies now have energy pay-back times in the range of 1-1.5 years (S.Europe).[73] With lifetimes of such systems of at least 30 years[citation needed], the EROEI is in the range of 10 to 30. They thus generate enough energy over their lifetimes to reproduce themselves many times (6-31 reproductions, the EROEI is a bit lower) depending on what type of material, balance of system (or BOS), and the geographic location of the system.[80]
This
is just from a simple Wikipedia article, and it took me about 3 minutes
to google for and read. Here's
the link:
http://en.wikipedia.org/wiki/Photovolta ... evelopment
Where did you get your figures from? Please provide a source.
Any other objections for this technology?