The Department of Defense, specifically the Army, is inviting submissions for the Hybrid Electric Powertrain, Power, and Propulsion Systems (HEPPS) Open Topic under the Small Business Innovation Research (SBIR) program. This opportunity allows for both Phase I proposals, with funding up to $250,000 for a 6-month period, and Direct to Phase II proposals, with funding up to $2,000,000 for a 24-month period, focusing on innovative technologies that enhance vehicle systems, fuel economy, operational flexibility, and meet military requirements. The initiative aims to integrate small business innovations into Army operations, with a strong emphasis on reducing greenhouse gas emissions and improving energy management strategies. Interested parties must submit their proposals by September 17, 2024, with further details available at the official SBIR website.