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Vines Grow Bigger Grapes Under Solar Panels

The test ran on a two-point-two-acre patch of Primitivo vines in Puglia, where panel shade also lowered air temperature by up to one degree Celsius; the wine may be less sweet.

Photo: Frank Schulenburg · CC BY-SA 4.0 · Wikimedia Commons · altered by BBN, shared under CC BY-SA 4.0
▶ As it aired · Weird News

Watch it as it aired: Dale Bearman and Hank Ledger on this story, from Weekend Edition at 1:36 PM ET. Cartoon anchors, real headline: the facts are Good News Network's, the jokes are ours.

Photo: Zinfandel
Photo: Frank Schulenburg · CC BY-SA 4.0 · Wikimedia Commons · altered by BBN, shared under CC BY-SA 4.0

At a glance

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What BBN said about it

  1. Hank Ledger · Lead AnchorVines grown under solar panels in southern Italy produced bunches nearly three times heavier than vines left in full sun, according to a University of Bari study reported by Good News Network.

  2. Dale Bearman · Chief Skeptic & ContributorNearly three times heavier from standing in the shade. I've done that for years and all I got was a lecture.

  3. Hank Ledger · Lead AnchorThe shoots grew more than twice as long too, and it was a two-point-two-acre patch of an eight-year-old Primitivo vineyard, which is also called Zinfandel.

  4. Dale Bearman · Chief Skeptic & ContributorRight, here's the catch. Sugar in the berries fell from twenty-five point eight degrees Brix to twenty-two point nine under the heaviest shade, according to Vinetur.

  5. Hank Ledger · Lead AnchorSo the grapes are bigger and less sweet.

  6. Dale Bearman · Chief Skeptic & ContributorBigger bunches, thinner wine. That's the bit that will end up on the label, mark me.

  7. Hank Ledger · Lead AnchorThe professor behind it says it's no catch-all, because shade tolerance varies by region and grape variety. One hot field, one grape.

  8. Dale Bearman · Chief Skeptic & ContributorMy theory is the vines were sunburnt and nobody asked them. A parasol and a good lie down fixes everything, apparently.

  9. Hank Ledger · Lead AnchorMine is that the grapes got a roof and a power station, and the only complaint is that the sugar went down.

  10. Hank Ledger · Lead AnchorI know that feeling. It's called a raise.

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From the archive: everything BBN aired on Saturday, October 24, 2026 · the Weird News archive · all months