Follow the link. That is why I made the slide, so you can see the price, the efficiency and the change over time all in one slide… But It turns out the $500 cells are only 28% efficient, to get to 40% is only in the lab at the leading edge of solar research. So I just updated the chart. Bob
What is the efficiency of a $500 space solar panel versus the efficiency of a home solar panel?
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On Wed, Aug 31, 2016 at 12:04 PM, Robert Bruninga
[email protected] wrote:
We just bought some high efficiency solar cells for our cubesat at $500 per watt.
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).