The series-hybrid electric drivetrains for both the wheeled (SEP-W) and two generations of tracked (SEP-T) vehicles were designed and manufactured by MAGTEC (Magnetic Systems Technology Ltd, Sheffield, UK).

This performance gave the vehicle individual wheel speed, position and torque control, providing electronic limited-slip differential, torque-vectoring, and importantly on-demand skid-steering (fully laden on dry tarmac), enhanced packaging and protection, and greatly improved suspension travel.

SEP-T was equipped with a novel 'cross-drive' pack incorporating concentric twin-traction and twin-steer motors, giving fully electric 'drive by wire' steering via the outboard gearboxes.

Power scheduling and operating points for the generator sets provided optimised fuel usage and performance, thus reducing the requirements for refuelling support in the field.

Both vehicle types were put through extensive testing of performance, durability, EMC etc., and were designed and constructed to allow straightforward scale-up into volume production.