[amsat-bb] HIgh efficiency solar cells for cubesats

Robert Bruninga bruninga at usna.edu
Wed Aug 31 17:04:47 UTC 2016

We just bought some high efficiency solar cells for our cubesat at $500 per

For what it is worth, that is 1600 times more expensive than home solar
panels now down to 30 cents a watt.  So I plotted it:


It is interesting that we hear so much about solar getting cheaper, but in
fact, the high end only gets more expensive.  That is why those people who
say “I’m waiting for higher efficiency” will never see it be cost
effective.  The space industry will always pay much,much more for just a
factor of two increase, whereas the homeowner will only ever pay the
cheapest.  And cheap it is!

Solar power is now cheaper than a custom glass window of the same size.
The cost of the solar cells is only 10% of the typical home installation
(recently seen as low as $2.70/watt contractor price in PA).


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