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Old 08-30-2018, 10:49 AM   #2615 (permalink)
All Darc
Join Date: Feb 2018
Location: Brazil
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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.

Originally Posted by oil pan 4 View Post
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.