I complete agree with you.
But thin solar films was always said to be cheaper to manufacture than solid solar cell. At least it was what I always heard, since nanosolar printed cells and organic solar cell films.
The 40% efficience was reached only with ultra expensive multi junction cells and very concentrated solar light. Zeneth Solar on Israel have a system like that for hot, to produce electricity and hot water.
Quote:
Originally Posted by oil pan 4
I saw some 40% efficient solar panels. Were still $20 a watt.
Efficiency doesn't really matter if you are putting them on the ground or roof top.
Getting the most W for the fewest $ is what matters here.
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