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.

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[–] Bytemeister@lemmy.world 7 points 2 days ago (1 children)

Kinda works if you use bifacial panels.

[–] Knock_Knock_Lemmy_In@lemmy.world 2 points 2 days ago* (last edited 2 days ago) (1 children)

Bifacial panels as a fence provides 3% extra yield but 30% extra revenue

https://www.gridcog.com/blog/solar-fence-vs-ground-mount-solar

[–] Bytemeister@lemmy.world 1 points 2 days ago* (last edited 2 days ago) (1 children)

Sure, but if you wanted solar panels to work on both sides of your East/West facing fence, you'd have to buy 100% more panels, so bifacial saves you 70% there. Seems like a good deal. I'm sure you read the "Model Overview" of that article and caught that the monofacial panels were facing the equator, and the bifacial panels were facing East/West...

Edit: bad read on my part, I didn't not understad the full content of the previous message.

[–] Knock_Knock_Lemmy_In@lemmy.world 3 points 2 days ago (1 children)

I don't think we are arguing. I was just giving you more details.

[–] Bytemeister@lemmy.world 1 points 2 days ago (1 children)

My interpretation of your comment was that bifacial solar panels are a useless gimmick which allows companies to charge more for a cheaper product.

Is that correct?

[–] Knock_Knock_Lemmy_In@lemmy.world 3 points 2 days ago (1 children)

No, the opposite. They are superior. Bifacial panels have a 3% additional yield over standard panels. The +10-20% cost premium is covered by the +30% revenue

Even with traditional mountings, Bifacial panels pick up extra light reflected from the ground.

[–] Bytemeister@lemmy.world 2 points 2 days ago (1 children)

Bad read on my part, sorry for the snark. Carry on.

No problem. Take a closer look a the link, particularly the graphs.