Navigating the Future of Fleet Powertrains
How businesses are taking a more flexible approach to vehicle technology as operational demands evolve
Fleets are exploring a broad mix of powertrain technologies as they look to reduce risk, improve operational flexibility and prepare for changing market conditions.
“Rather than retrenchment, we are seeing interest and growth in use by fleets across a portfolio of solutions so they can deploy each where it works best,” said Nate Springer, vice president of market development at TRC Clean Transportation Solutions, while speaking during ACT Expo 2026.
For fleets, diversification can help build long-term business resilience. The 2026 State of Sustainable Fleets Market Brief found that the goal for many fleets is to identify where different powertrains perform best operationally and economically.
Why Diversification Matters
Diesel has been the dominant fuel source for commercial trucking because of its reliability, established infrastructure and operational flexibility. However, relying exclusively on a single fuel or vehicle technology can expose fleets to operational and financial risk.
Fuel price volatility remains one of the most immediate concerns. Diesel prices continue to fluctuate in response to geopolitical events, refinery capacity constraints and broader energy market disruptions. Earlier this year, diesel prices climbed sharply amid instability in global oil markets, increasing interest in alternative fuels such as renewable natural gas and biodiesel.
At the same time, regulatory requirements continue to evolve. Although some federal emissions mandates and incentives have been rolled back, state and regional regulations still vary significantly, particularly in markets such as California. Fleets operating across multiple geographies may face different compliance requirements.
Customer expectations are also changing. Many shippers and retailers are evaluating transportation providers based in part on their sustainability initiatives and emissions-reduction strategies. Fleets that can offer lower-emission transportation options may gain a competitive advantage in certain markets or customer segments.
Diversification can also help fleets prepare for future technology shifts. As original equipment manufacturers continue investing in battery-electric vehicles, natural gas engines and hydrogen fuel cell development, fleets with operational experience across multiple technologies may be better positioned to scale when economics and infrastructure mature further.
“Finding the right application is key to introducing the technology into your business,” said Travis Hill, managing director of Penske Energy. “The majority of fleets have at least some routes or applications where the technology can work today.”
Matching Technology to the Right Application
Rather than replacing entire fleets overnight, many organizations are identifying specific applications where alternative powertrains can deliver measurable value.
According to the Market Brief, battery-electric vehicles are already proving effective in certain light-duty and return-to-base operations, including delivery vans, service vehicles and yard tractors. These applications typically involve predictable routes, lower daily mileage and access to overnight charging infrastructure.
Yard tractors are also emerging as a strong fit for electrification because they operate in controlled environments with limited range requirements.
Natural gas continues gaining traction in heavier-duty applications as well. The availability of the 15-liter Cummins X15N natural gas engine has expanded deployment opportunities for fleets seeking alternatives to diesel in regional and long-haul operations.
At the same time, renewable diesel and biodiesel are becoming attractive options for fleets looking to reduce emissions while continuing to leverage existing diesel infrastructure and operational practices.
The Benefit of Pilot Programs
For fleets evaluating new vehicle technologies, pilot programs allow them to test vehicles under real-world operating conditions to evaluate route performance, energy usage, maintenance requirements, charging strategies and driver feedback.
Even when a route or application does not work well with current technology, the information gathered can still provide long-term value. Fleets gain a clearer understanding of vehicle range requirements, charging windows, payload limitations and operational considerations that can help inform future decisions.
“Most fleets aren’t going to save money right away, but what they will get is real-world data on their own routes, an understanding of what the technology can do in their specific operation, and the experience to make a smart decision when the time comes to scale,” said Scott Brower, vice president of vehicle supply, new products and vehicle applications for Penske Truck Leasing.
As fleets gain operational familiarity with emerging technologies, they can make more informed long-term decisions about vehicle acquisition, infrastructure investments and network planning.
Preparing for a Multi-Powertrain Future
Springer said the commercial transportation industry is unlikely to transition entirely to a single alternative fuel or propulsion system and is more likely to embrace a multi-powertrain environment where diesel, natural gas, battery-electric vehicles and renewable fuels each play a role depending on the application.
“To put it succinctly, most of these technologies have shown where they stand on their own, and for fleets, advanced clean technologies have moved from sustainability strategy to business strategy,” Springer said.