PowerUp aims to develop the Vehicle-2-Grid (V2G) interface, involving a full development cycle of physical/link-layer specification, charging control protocol design, prototyping, conformance testing, field trials, and standardisation. Its results will ensure that FEVs smoothly integrate into emerging smart-grid networks. Thereby the efficiencies resulting from robust grid operation may be achieved; V2G capabilities will smoothen the daily fluctuation of electricity demand and will enable FEVs to act as emergency energy supplies. To achieve these desired results, it is essential that any electric vehicle type would be compatible with any European smart-grid network.V2G technology will be developed in liaison with the ongoing ISO/IEC standardisation of the V2G interface, and it will extend existing smart-metering standards and ETSI ITS standards for vehicular communications. On the grid side, smart electric meters will be enhanced for V2G capability and V2G-specific demand-balancing control algorithms will be researched. The specification phase will synthesise requirements of both vehicle manufacturers and utility operators. The produced V2G adapter prototypes will undergo conformance testing and field trials. The testing part will also cover safety and security aspects. The field trial activities will demonstrate end-to-end integration with the chain of smart-grid control systems. These trials will be furthermore complemented by simulations of larger V2G uptake rates, which assess V2G impact on grid stability and robustness.The validated PowerUp results will be contributed into standardisation, completing the overall R&D cycle. We aim to ensure industrial consensus on V2G interface, and carefully trial V2G implementations in a realistic integrated environment. PowerUp partners are capable of follow-up project results deployment; its impact will facilitate reaching FEVs' full potential economic and environmental benefits.