SEP (Splitterskyddad Enhetsplattform,or Modular
Armoured Tactical System) has been developed
by BAE Systems Hagglunds and Sweden’s Defence
Materiel Administration to meet the needs of the
forces of the future.
The SEP program was initially started in 1994 for the Swedish military (and as a proposed British Vehicle) but was cancelled in the early 2000's. However, the program was resurrected and a production contract was to be awarded in 2009 and initial deliveries expected in 2011.
The common chassis will have an electric transmission system, replacing the mechanical drive shafts with electrical cables, transferring the power from the engines to wheels. This transmission system has many advantages over existing mechanical systems, including volume and fuel efficiency, and increased stealth characteristics. Other benefits are reducing life cycle costs and environmental impact. Decoupled from the final drives, the engine can be mounted flexibly, including the use of distributed power sources (multiple engines). The batteries integrated into the electric drive system allow stealth movement on electrical power only, driving silently with the engines shut down. Another benefit of the electric drive is the increased useable internal volume.