this post was submitted on 14 Jul 2025
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cross-posted from: https://slrpnk.net/post/24690127

Solar energy experts in Germany are putting sun-catching cells under the magnifying glass with astounding results, according to multiple reports.

The Fraunhofer Institute for Solar Energy Systems team is perfecting the use of lenses to concentrate sunlight onto solar panels, reducing size and costs while increasing performance, Interesting Engineering and PV Magazine reported.

The "technology has the potential to contribute to the energy transition, facilitating the shift toward more sustainable and renewable energy sources by combining minimal carbon footprint and energy demand with low levelized cost of electricity," the researchers wrote in a study published by the IEEE Journal of Photovoltaics.

The sun-catcher is called a micro-concentrating photovoltaic, or CPV, cell. The lens makes it different from standard solar panels that convert sunlight to energy with average efficiency rates around 20%, per MarketWatch. Fraunhofer's improved CPV cell has an astounding 36% rate in ideal conditions and is made with lower-cost parts. It cuts semiconductor materials "by a factor of 1,300 and reduces module areas by 30% compared to current state-of-the-art CPV systems," per IE.

(page 3) 26 comments
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[–] reddig33@lemmy.world 5 points 1 day ago (1 children)

How does concentrating the sunlight like this not start a fire? Or wouldn’t this at least cause panel electronics to overheat?

[–] JcbAzPx@lemmy.world 3 points 1 day ago

I would imagine they're not concentrating maximally. Just enough to increase efficiency.

[–] Nightsoul@lemmy.world 1 points 1 day ago

I feel like this is one of those discoveries thats like, well duh of course it would work that way

[–] Treczoks@lemmy.world 1 points 1 day ago

I wonder what kind of concentrating optics they use. Simple Fresnel lenses won't do, unless you closely follow the sunlight to stay in focus.

[–] AmidFuror@fedia.io 1 points 1 day ago (1 children)

"Has the potential to contribute...." Wow. Amazing.

[–] floofloof@lemmy.ca 2 points 1 day ago* (last edited 1 day ago) (1 children)

I like the understatement. Shame they spoiled it with the "game changing" claim at the beginning.

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[–] ludicolo@lemmy.ml -2 points 1 day ago
[–] witty_username@feddit.nl -2 points 1 day ago

SLASH THE GAME CHANGING BREAKTHROUGH

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