Sunnova was a leading solar installer only a couple of years ago. Today, the company is in bankruptcy, trying to reorganize its mountain of debt in a troubled time for the industry.Sunna filed for Chapter 11 on Monday,

U.S. companies that install and finance residential solar have been struggling for years with rising interest rates and unfavorable policy shifts in California , the country’s biggest rooftop solar market.

Sunnova Energy, the struggling Houston-based residential solar company, has filed for bankruptcy, according to court and regulatory filings.