Electric Drive Train of 9m-12m Bus with following components: 1. A c Synchronous Motor with Inverter(Dc-Ac-Dc Conversion) 110Kw 85 Kw 2. Vehicle Control Unit 3. Battery Management System 4. Battery Pack (250 Kwh-300 Kwh) 5. On-Board Charger 6. Auxiliary Motor and Power Supply System The system is for converting old diesel bus into electric bus.