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Solar Power Equipment Prices Keep Rising in Clean Energy Threat

Tongwei and Longi boosted prices after polysilicon costs rose 15% in the past two months.

An employee inspects photovoltaic cells on the production line at the Longi Green Energy Technology Co. plant in Xi'an, China.

An employee inspects photovoltaic cells on the production line at the Longi Green Energy Technology Co. plant in Xi'an, China.

Photographer: Qilai Shen/Bloomberg
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Solar power equipment makers continued to lift prices this week as soaring polysilicon costs spread through the supply chain and threaten to slow clean energy deployment.

Tongwei Co. on Monday increased prices for solar cells by 3.2% to 4.1% depending on their size, while Longi Green Energy Technology Co. lifted wafer prices 3.3% to 4.3% Tuesday. The increases came after prices of polysilicon, the key material in both products, rose 15% since mid-May amid factory shutdowns due to accidents and planned maintenance.