Siemens will supply all necessary components and provide technical support, while Vinamotor will prepare the platform and manufacture remaining parts of the bus for operational readiness. With the Siemens hybrid drive technology, city buses can reduce fuel consumption and save operating cost by up to 50%.

The diesel-electric hybrid drive Elfa systems combine mobile energy generators, such as diesel generator sets and high performance energy storage devices. Depending on the storage capacity of the system, the bus can also be driven purely electrically.