On April 2, 1981, ASPİLSAN Enerji was established in the Kayseri Organized Industrial Zone as a subsidiary of the Turkish Armed Forces Foundation (TAFF). Over the past 42 years, ASPİLSAN Enerji has played a significant role in the development of the defense industry and in reducing foreign dependency by utilizing domestic resources to develop and produce battery and cell solutions to meet the energy requirements of the Turkish defense and aviation industry. Currently, ASPİLSAN is actively involved as a solution partner in projects such as ERCİYES, ANKA UCAV, MİLGEM-5 TCG Istanbul, and BARBAROS MLU. They are also working on the development of Lithium-based technologies for aviation projects including KAAN (National Combat Aircraft), T625 GÖKBEY, HÜRJET, HÜRKUŞ, and T929 ATAK-II. Moreover, ASPİLSAN recently signed a contract on May 7, 2021, for the KAAN Battery Work Package, which was selected by TUSAŞ on November 4, 2020. 

ASPİLSAN Enerji is actively engaged in the development of fuel cells in various types including PEM, DMFC, and DEFC. They possess the capability to design fuel cells ranging from 50W to 100kW levels, catering to both military and civilian applications. The company's strategic product portfolio includes System Batteries (BB 2590/U), Energy Storage Systems (for Renewable Energy Patrols), 6T Battery (for tank and armored vehicle systems), UAV/UCAV System Batteries, Electric Vehicle Batteries, Telecommunication Batteries, and Submarine Batteries.