The "Vehicle Innovation Act of 2026" establishes a consolidated authority for the Department of Energy's vehicle technology program, aiming to develop United States technologies and practices that enhance fuel efficiency and reduce emissions across all domestically produced vehicles. Its core objectives include supporting domestic research, development, engineering, demonstration, and commercial application of advanced vehicles, engines, and components. The Act also seeks to enable vehicles to move goods and passengers with less energy, offer greater consumer choice, and shorten technology development cycles. The bill mandates a comprehensive program of basic and applied research, development, engineering, demonstration, and commercial application activities focused on substantially reducing petroleum use and emissions. This includes a wide array of technologies such as electrification of vehicle systems , batteries and energy storage , hydrogen vehicle technologies , lightweighting materials , and advanced internal combustion engines . It also addresses crucial infrastructure needs like refueling and charging systems for alternative fueled and electric vehicles, including those in rural areas. To maximize impact, the Secretary of Energy is directed to ensure activities are carried out in partnership with automotive manufacturers, universities, national laboratories, and other industry stakeholders, promoting domestic manufacturing and technology transfer. The legislation also establishes specific programs for medium- and heavy-duty commercial and transit vehicles , including a competitive grant program for demonstrating integrated advanced technologies on Class 8 truck and trailer platforms. Furthermore, it outlines a pilot program for nonroad mobile equipment and mandates reporting on technology development and program progress. The Act authorizes appropriations for the Department of Energy, starting with $313,567,000 for fiscal year 2027 and increasing annually to $366,829,000 by fiscal year 2031, for research, development, engineering, demonstration, and commercial application of vehicles and related technologies. It also includes provisions for coordinating activities to avoid duplication and repeals certain existing authorities from the Energy Policy Act of 2005 to streamline the vehicle technology program.