Peri Hartman via EV wrote:
Lee, you're always so spot on but this time I'm going to disagree - a
little. Efficiency of PV does matter. You have to buy the units, so the
more efficient they are the less space they will take to generate the
same amount of watts. Most people don't have unlimited space, so space
does make a difference.
It could also make a difference in purchase cost. Fewer panels mean less
mounting hardware and less electrical work. Also fewer units could mean
less overall cost for the PV units, themselves.
Oh, I agree! I just think that if you're buying based on price, then
look at *price* (not efficiency). Of course, this should be the
installed price, and not just that of the panels alone.
Or, you may want to buy based on other factors. Maybe they have to fit
within a certain maximum size, or you need to generate a certain amount
of power. Then efficiency becomes more important.
When people make a big purchase, they need to be very clear about their
goals. It's all too easy to kid ourselves, or rationalize, or
oversimplify. ("I *say* I bought this car to save gas, but I really
bought it because I always wanted a red sports car").
--
You never change things by fighting the existing reality. To change
something, build a new model that makes the existing model obsolete.
-- R. Buckminster Fuller
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, leeah...@earthlink.net
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