 SAN DIEGO BOSTON--BUSINESS WIRE--- XL ClassAction--Shareholder rights law firm Robbins LLP announces that it is investigating XL Fleet Corp. NYSE: XL to determine whether certain XL Fleet Corp. officers and directors violated the Securities Exchange Act of 1934 and breached their fiduciary duties to the Company. XL Fleet provides vehicle electrification solutions for commercial and municipal fleets in North America. It offers hybrid and plug-in hybrid electric drive systems. If you suffered a loss due to X 