BAE Systems’ next-generation electric drive system achieved a milestone in sustainable transit technology, completing rigorous testing at the Federal Transit Administration’s (FTA) Bus Research and Testing Center (BRTC) with best-in-class fuel economy and emissions results, according to the company’s press release. 

The company’s Gen3 electric drive system powered a hybrid-electric bus to an average of 6.6 miles per gallon, establishing a new benchmark for hybrid buses across North America.

BAE’s Gen3 System

The Gen3 system, which integrates propulsion and accessory power controls, demonstrated substantial gains in energy efficiency, performance, and environmental impact during several months of comprehensive testing. 

The system’s fuel efficiency translated directly into significant emissions reductions across multiple categories, reinforcing its value to transit agencies seeking cost-effective paths to cleaner operations.

“BAE Systems’ Gen3 drivetrain technology raises the standard again for the transit industry,” said Bob Lamanna, VP/GM, power & propulsion solutions, at BAE Systems. “The test results highlight the efficiency of our proven technology, which enhances sustainability while delivering the reliability, performance, and cost savings that transit authorities expect.”

The bus was evaluated under various duty cycles to reflect typical transit conditions, with BRTC staff also assessing maintainability, noise levels, and system integration. 

Now that testing is complete, transit agencies nationwide can apply for FTA grant funding to purchase buses equipped with BAE Systems’ Gen3 drive technology.

The Gen3 system has a high-efficiency traction motor, onboard energy-storage solution, and intelligent power electronics. These components form a cohesive electric propulsion and accessory power system to reduce fuel use and emissions while maintaining a quiet, smooth passenger ride. According to BAE officials, its modular design and use of fewer components and cabling simplify maintenance and increase uptime.

Next-Generation Performance

BAE said its engineers have incorporated cutting-edge materials, such as silicon carbide, and a compact, lightweight architecture to boost electrical efficiency. The result is a robust platform that builds on nearly three decades of proven performance in electric drive systems.

“This system was developed not only to boost energy savings and reduce emissions, but also to streamline serviceability and performance for agencies dealing with real-world operating constraints,” Lamanna added.

BAE Systems brings deep expertise to the sector, with over 19,000 electric drive systems deployed on transit buses globally. These include hybrid-electric, battery-electric, and hydrogen fuel cell vehicles. Its electric propulsion technology is engineered and supported at its facilities in Endicott, N.Y., and Rochester, U.K.

The successful Gen3 testing milestone marks another step forward for BAE Systems, which is helping shape the transition toward cleaner, more efficient public transit solutions worldwide.