Thomas Built Buses Features 'Powering Possibilities' at NAPT
The school bus manufacturer will showcase key technological advancements in electric vehicle technology and the newest diesel engines at the association’s trade show on Tuesday.

Thomas Built Buses will showcase key technological advancements in electric vehicle technology and the newest diesel engines at the NAPT trade show. (Shown here is the Saf-T-Liner eC2 Electric Bus.)

KANSAS CITY, Mo. — Thomas Built Buses will debut key technological advancements in electric vehicle technology and the newest diesel engines at the NAPT trade show on Tuesday.
“It’s a new world in electrification and, as electric vehicle technology evolves at lightning-fast speed, Thomas Built Buses is working with visionary partners to deliver groundbreaking innovations,” said Caley Edgerly, president and CEO of Thomas Built Buses. “It’s another chapter in our commitment as part of Daimler Trucks North America to provide sustainable solutions.”
Edgerly added that the manufacturer is also showcasing future electrification technologies.
Highlights at Thomas Built Buses’ booth will include:
Saf-T-Liner eC2 Electric Bus: The Saf-T-Liner eC2, powered by Proterra, will be on display accompanied by Thomas Built’s partners in EV technology — Efficient Drivetrains Inc. (EDI), Meritor Inc., and Proterra Inc. Key features of the new eC2 on display include new options for greater range (up to 150 miles), charging options for AC and DC power, and greater overall efficiency, according to the manufacturer. Thomas Built Buses will also showcase a DC charging option and an example of an e-axle mobility option.
Thomas Built Buses Saf-T-Liner C2,equipped with Detroit DD5 Engine with Detroit Connect Virtual TechnicianSM Remote Diagnostics Service: The Saf-T-Liner C2 will be equipped with the new Detroit DD5 engine. This new engine is designed to deliver power, performance, best-in-class fuel economy, reliability, easier maintenance, and a low total cost of ownership. It features top-load oil and fuel filters, with up to 45,000-mile oil and fuel filter change intervals, or 18 months or 1,500 hours, whichever comes first, according to the manufacturer.
The engine also meets 2017 greenhouse gas (GHG17) standards, utilizing technology that includes variable exhaust cam phasing, which allows additional heat into the exhaust. This new technology is designed to enable efficient operation of the aftertreatment system in low speed stop-and-go operations.
Additionally, the DD5 engine comes equipped with the Detroit Connect Virtual Technician remote diagnostics service.
The Saf-T-Liner C2 will also showcase technologies and safety features such as a collision warning system, pedestrian detection, and the PV360 multi-camera.
Thomas Built Buses Saf-T-Liner HDX, equipped with Detroit DD8 engine with Detroit Connect Virtual Technician remote diagnostics service: The Detroit DD8 engine is a 7.7L in-line 6-cylinder medium-duty engine tailored to meet the demanding requirements of Thomas Built Buses Saf-T-Liner HDX. It features a horsepower range of 260-300 horsepower and a torque range of 660 to 860 lb.-ft.
The DD8 offers longer maintenance intervals and improved fuel efficiency. It meets 2017 GHG17 standards and utilizes a global medium-duty engine platform. It also employs variable exhaust cam phasing for more efficient aftertreatment system performance, in an effort to help reduce issues previously experienced in low-speed or stop-and-go operations.
The DD8 also offers Detroit Connect Virtual Technician remote diagnostics service.
Meanwhile, Thomas Built Buses reports that it has sold out of its 2018 allocation of the DD5 engine.
However, customers can still order the DD5 engine for 2019 delivery by contacting their local Thomas Built Buses dealer.
More Alternative Fuels

Alt-Fuel Moves: Fleets Power Up Beyond the Bus
See how districts are pairing electric buses with charging, solar, and V2G technology to cut costs, boost resilience, and unlock new fleet value.
Read More →
What the EPA’s Updated Clean School Bus Program Means for Fleet Electrification in 2026 and Beyond
A guide to the EPA’s evolving school bus grants, including how the Trump administration changed funding priorities and how school districts can prepare for future bus purchases.
Read More →A Solution Helping School Buses Charge Without Major Infrastructure Upgrades
Power Innovations International dishes on its EV charging technology designed to reduce infrastructure barriers, improve reliability, and support V2G applications for school bus fleets.
Read More →
New Eagle Launches All-in-One EV Control Platform
The new OpenECU NX3 platform integrates charging and vehicle controls into a single platform, with support for megawatt charging and vehicle-to-grid technologies.
Read More →
GreenPower Unveils New Heating Solution for Type A Bus
The all-electric bus manufacturer's new product aims to eliminate cold-cabin issues on its Nano BEAST zero-emission school buses operating in cold climates.
Read More →
Alt-Fuel Moves: Fleets Plug In for the Long Haul
School districts across the U.S. are moving electric school bus plans into operation, with new fleet deployments, charging infrastructure, and long-term electrification partnerships taking shape.
Read More →The Achilles Heel of School Bus Electrification: BetterFleet’s Take
BetterFleet’s managing partner discusses AI-powered EV fleet management, vehicle-to-grid challenges, and the real challenges in bus electrification today, from ACT Expo.
Read More →
You're On Your Own to Pick a Drivetrain [Op-Ed]
After years of federal pressure toward electric school buses, districts are suddenly being told to choose their own path. Let’s explore the risks, realities, and politics behind school bus drivetrain decisions.
Read More →Wattson: Thomas Built’s Largest EV School Bus Yet
Check in with Mark Childers on the new Wattson Type D electric school bus, featuring faster charging, expanded passenger capacity, and advanced safety technology.
Read More →The New Era of Electric School Buses: V2G, Bidirectional Chargers & More
The Mobility House discusses AI-powered charging, vehicle-to-grid technology, smart energy management, and the next phase of school bus electrification.
Read More →
