[6] In 2014, GreenPower launched an EV350 model, a forty-foot, all-electric transit bus combining electric drive and battery technologies with a lightweight chassis and low-floor body.

[9] In 2016, the company acquired a 9.3 acres (3.8 ha) plot on Hope Drive in Porterville, California, to build a 150,000 square feet (14,000 m2) manufacturing facility for roughly $10 million.

[9] In March 2017, the City of Porterville, California, ordered ten GreenPower EV350 buses and charging infrastructure for nine million dollars.

[11] The California Air Resources Board approved the Synapse for its Hybrid and Zero-Emission Truck and Bus Voucher Incentive Project.

[4] Delays in the company's growth were in part due to GreenPower's "refusal to carry out accepted crash tests on their large buses—a requirement for federal funds that transit agencies use to buy the vehicles.

"[4] In addition, GreenPower's vehicles are manufactured in China, with minor modifications being made in the United States, meaning they were not compliant with President Biden's "Buy America" program.

[4] The federal government gives agencies funds towards electric bus purchases, but 75% of the vehicle's parts must be made in the United States to comply to Buy America.

[3] The Workforce Development Board of Kanawha County offered BridgeValley Community and Technical College students funding for training, transportation, books, and childcare to prepare for employment with GreenPower.