From the article:

In 2023, about 90% of old or faulty solar panels in the U.S. ended up in landfills. Millions of panels have been installed worldwide over the past few decades – and by about 2030, so many will be ready to retire that they could cover about 3,000 football fields.

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Sending a solar panel to a landfill costs between US$1 and $5 in the U.S. But recycling it can cost three to four times as much, around $18. And the valuable materials inside solar panels, such as silver and copper, are in small amounts, so they’re worth about $10 to $12 – which makes recycling a money-losing prospect. Improvements in the recycling process may change the economics.

But for now, it’s even hard to reclaim the glass in solar panels. Many layers are glued together and need to be separated before they can be melted down for reuse. And if the separation is not precise enough, the glass that is recovered won’t be of high enough quality to use in making other solar panels or windows. It will be suitable only for lower-quality uses such as fill material in construction projects.