Stion, a thin-film manufacturer headquartered in California, has secured around US$25 million to support its plans to expand its production facility, media reports reveal.

In a telephone interview with Bloomberg, Stion’s Senior Director of Business Development Frank Yang said that the majority of the company’s existing investors were participating in the financing which was led by Khosla Ventures.

The funding will be used to increase the production capacity at Stion’s facility in Hattiesburg, Mississippi, from 100MW to 140MW a year. When the facility launched in September 2011, the company said that further expansion plans over the next six years may require US$500 million of investments.

In December 2011, Stion’s strategic partner Avaco led a US$130 million funding round. Avaco will also help the company to establish a subsidiary in South Korea to serve the Asian and European markets.