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Green Tech Boom Threatened as Solar Prices Surge to Decade High

Polysilicon prices are skyrocketing and putting solar panels on the threshold of becoming too costly.

A solar park in Portugal.

A solar park in Portugal.

Photographer: Goncalo Fonseca/Bloomberg

The price of a key material for solar panels rose for the seventh straight week, threatening to slow clean energy installations critical to the world’s efforts to achieve climate targets.

Prices of polysilicon, the ultra-conductive metal used to make solar panels, have surged to the highest level since 2011. The increases are rippling through the solar supply chain, with panel prices beginning to rise this week after holding steady for two months, Solarbe analysts said in a research note.