**Preface to "Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) Technologies"**

The present volume contains proceedings of the Special Issue: "Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) Technologies", submitted from 1 May 2019 to 31 May 2020.

In recent years, there has been a global outcry for the decarbonization of energy systems to provide a secure and sustainable energy supply while cutting down on greenhouse gas emissions (GHGs) in an effort to avoid global warming. With the explosion in use of battery energy storage, electric vehicles (EV) are considered an efficient eco-friendly means of transportation. They also play a role through their interaction with electricity grids, delivering power as well as controlling the charging rate for a faster charging time. EVs are able to meet this role due to grid-to-vehicle (G2V) and vehicle-to-grid (V2G) operation, providing bidirectional power flow to tackle the twin challenges of faster charging and providing ancillary services to the grid. This volume contains articles on "Grid-to-Vehicle (G2V) and Vehicle-to-Grid (V2G) Technologies" such as solutions in G2V and V2G, including but not limited to the operation and control of gridable vehicles, energy storage and management systems, charging infrastructure and chargers, load forecasting for distributed systems, V2G interfaces, communication standards, and charging topologies as well as environmental impacts and economic benefits.

Special thanks to all who kindly contributed their papers for this issue: the esteemed reviewers and the editors of MDPI *Energies* for their kind help and co-operation. We are also indebted to the MDPI *Energies* Editorial Office. The editorial assistance of the publishing and production teams at *Energies* is acknowledged for the prompt processing and production of work of this Special Issue that successfully kept production on schedule.

> **Sekyung Han, Moses Amoasi Acquah** *Editors*
