This paper presents a novel concept, named as smart mobile power bank, to implement grid-friendly vehicle-to-Grid technology. The concept and principle of mobile power bank is first developed, where multi-port DC/DC converter is developed to integrate hybrid energy storage system, photovoltaic panels, and various renewable fuel vehicles in a form of DC microgrid. Further, the operation and control strategy are developed to enable the proposed SMPB. The proposed solution is able to improve the security, flexibility and economy for power grid with high penetration of renewable fuel vehicles.