The General Motors, Mitsui and Exelon-backed electric bus manufacturer has increased its total debt and equity financing to more than $200m.

US-based electric bus producer Proterra, which counts several corporates among its investor base, raised $30m in equity funding and $25m in debt financing on Tuesday.

The equity portion of the round comprised $19m from undisclosed new strategic investors, which according to Greentech Media included a sovereign wealth fund from the Middle East, an unnamed family office and individual investors including Mike Dorsey and Miriam Rivera, as well as an additional $11m from undisclosed existing Proterra backers.

Proterra designs and manufactures…