$162 Million Department of Energy Program to Fund Projects to Electrify Medium- and Heavy-Duty Freight Trucks, Fund Heavy Electric Vehicle Charging Technologies and Infrastructure   DALLAS, TEXAS, May 13, 2021 – -- Principal Solar, Inc. (OTC Pink: PSWW) (“Principal” or “the Company”), a strategic investor in and acquirer of technologies that support next-generation opportunities in traditional, renewable, and clean energy sectors as well as an investor in an acquirer and operator...