FREMONT, Calif.--(BUSINESS WIRE)--Nextpower (Nasdag: NXT, formerly Nextracker), a leading provider of intelligent power generation systems for solar power plants, announced today that Fitch Ratings ) has issued inaugural investment grade credit ratings for the company. ("Fitch†Fitch has assigned a Long-Term Issuer Default Rating of BBB- to the Company with a Stable outlook. "Achieving an investment grade credit rating is an important milestone for Nextpower and reflects the strength of our business model, ...