Growing concerns about environmental sustainability of transport urgently require support for new electrified solutions. Integration and coordination of the energy and transport sectors are key to achieving cost-effective decarbonization of mobilitySustainable mobility and its effective integration into the energy grid are essential for reducing greenhouse gas emissions, paving the way towards a zero-emission energy ecosystem. This goal is in line with the "European Green Deal", which emphasizes putting users first and providing them with affordable, accessible, healthier and cleaner alternatives to their current transport habits.

The potential of electric vehicles (EVs) and storage technologies

Optimal integration of sustainable transport with the energy sector is of utmost importance given the rapid development of both areas. Electrification of transport is a key priority in the development of a climate-neutral European road transport system. Through effective integration, additional benefits can be achieved for both the transport and energy sectors. Smart charging (smart charging) and Vehicle-to-Grid (V2G) technology are essential tools for this synergy. V2G, where vehicles can feed energy back into the grid, transforms EVs into decentralized storage units that can balance supply and demand on the grid, reduce grid congestion, and stabilize the integration of renewable energy sources (RES). This is key to decarbonizing the energy system.

In addition to EVs themselves, they also play a key role stationary energy storage systems (ESS). The integration of ESS into the charging infrastructure, especially for fast charging, helps to reduce peak loads, optimize the support of photovoltaic generation and increase resilience to power outages. Second-life batteries, obtained from electric vehicles, also contribute to circular economy and serve as stationary storage solutions. They can store excess energy from renewables and release it during peak demand, improving grid reliability and providing support services. Despite concerns about battery degradation, studies and experience show that implementing smart charging practices can positively impact battery life, alleviating user concerns while increasing the resilience of the energy system.

Challenges and regulatory framework

The integration of electromobility into electricity grids poses challenges, particularly in terms of coordinated planning of the location, capacity and types of charging stations. The development of charging networks currently risks being decoupled from the expansion of the electricity grid, raising significant concerns about grid capacity. Anticipatory investments by Distribution System Operators (DSOs) are essential to strengthen infrastructure in advance and prepare for future demands. It is necessary for these actors to share their plans with system operators to prepare for necessary grid reconfigurations or upgrades.

The European Union supports sustainable transport through various policies and regulations. The Alternative Fuels Infrastructure Regulation (AFIR) sets mandatory national targets for EV charging infrastructure. The revised Renewable Energy Directive (RED) requires electric vehicles to be able to participate in congestion management markets and provide flexible services. The EU Action Plan for Grids further highlights the need to improve long-term grid planning for a higher share of renewables and increased electrification.

Applications and best practices

Several European projects demonstrate the feasibility and benefits of integrating EVs into smart grids. Project EV4EU develops and implements user-oriented V2X management strategies to achieve mass deployment of electric vehicles, taking into account the impact on batteries, user needs and the electrical system. The project eC4D shows how the combined nominal capacity of charging stations can exceed the maximum permitted grid power by up to 180 % thanks to local storage and RES. The initiative FlexCHESS uses smart charging to manage EV communities, contributing to grid stability by balancing charging loads. The project HELIOS explores the potential of combining V2G with second-life batteries to increase flexibility and reduce energy storage costs.

These examples underscore the need for coordinated policies, technological innovation, and market incentives to unlock the full potential of EV and grid integration. Although V2G can accelerate the electrification of road transport, it is important to monitor its impact on the electricity grid in the medium and long term, especially with regard to the development of second-life cycle batteries and the ability to take advantage of favorable electricity prices.

Integrating sustainable transport The energy grid is like a river that flows through a landscape. Without coordinated planning and innovation, its flow can encounter obstacles, causing congestion and inefficiency. However, with smart solutions such as V2G and storage systems, the river becomes a flexible artery that not only drives sustainable development, but also balances and stabilizes the entire ecosystem, powering it with green energy and minimizing its carbon footprint. Spring