this post was submitted on 06 Jul 2026
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Switzerland bolted 5,000 solar panels onto a dam wall 8,000 feet up in the freezing Alps. The plant now makes three times more winter power than any farm down in the valleys (www.ecoportal.net)
submitted 2 days ago by UnderpantsWeevil@lemmy.world to c/technology@lemmy.world
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Up on the dam, almost everything that looks like a problem becomes an advantage.

The plant sits above the fog line, in thin, clear air that lets far more sunlight through.

The higher you go, the stronger and cleaner the sunlight becomes.

Cold actually helps, because solar panels work more efficiently when they are not baking in heat.

And then there is the snow, which acts like a giant mirror, bouncing extra light up onto the panels from below.

Scientists call it the albedo effect, and it can lift a mountain plant’s output well beyond anything possible in the valley.

A test site at a similar height recorded yearly output far above a typical Swiss plant.

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[–] Foxer@lemmy.ca 0 points 2 days ago

To be honest, historically and depending on the installation solar power is more useful in the summer or warmer months and dams are less useful because you're hoping the reservoir fills up and provides power all winter. The reverse is true in the winter we're damn sure produce more reliable energy but solar power is slightly less available

So to me this sounds like a fairly elegant solution where the dam will now produce large amounts of power throughout the spring and summer months as well as the fall and winter months allowing for more water to be saved up for the winter and more power generation. I'm sure the solar also helps augment the winter as well