{"id":90867,"date":"2025-08-26T10:29:28","date_gmt":"2025-08-26T07:29:28","guid":{"rendered":"https:\/\/intellias.com\/?post_type=blog&p=90867"},"modified":"2025-08-26T12:18:28","modified_gmt":"2025-08-26T09:18:28","slug":"smart-charging-and-vehicle-to-grid","status":"publish","type":"blog","link":"https:\/\/intellias.com\/smart-charging-and-vehicle-to-grid\/","title":{"rendered":"Smart Charging and Vehicle-to-Grid: The Key Role of Standards and Cooperation"},"content":{"rendered":"

According to a study by the International Energy Agency<\/a>, 200\u2013300 million electric vehicles (EVs) are expected to be on the roads worldwide by 2030, and the trend continues to rise. This means EVs will play an increasingly important role in energy distribution within tomorrow\u2019s dynamic, intelligently managed power grids. Not only will EVs act as energy consumers, but they will also store electricity and feed it back into the grid when required. They can function as intermediate storage to balance fluctuations in renewable energy production and stabilize the power supply. The ISO 15118 protocol creates the technical foundation for this bidirectional interaction known as Vehicle-to-Grid (V2G).<\/p>\n

ISO 15118: Enabler of smart and bidirectional charging<\/h2>\n

The ISO 15118 protocol acts as a common standard, defining the fundamentals of charging communication between the charging infrastructure, electric vehicle, and, where applicable, backend systems such as energy management platforms.As part of the Combined Charging System (CCS), it uses Power Line Communication (PLC) over the charging cable to enable secure and seamless data exchange during the charging process. It is the first protocol to natively support bidirectional charging introduced with ISO 15118-20, enabling the flexible use of electric vehicles as distributed energy storage units within the power grid.<\/p>\n

With planned charging in V1G mode, a simple form of demand management is employed, typically shifting charging to off-peak hours when electricity is cheaper and grid stress is lower. V1G, supported by ISO 15118-2, enables unidirectional charging with intelligent scheduling and dynamic load adjustment based on external signals such as grid conditions, electricity pricing, or user preferences without feeding energy back into the grid.<\/p>\n

The other charging mode described is V2G. In this mode, external energy management systems can be integrated to make decisions based on real-time grid conditions and projected loads, enabling truly \u201csmart charging\u201d capabilities. Since the charging process is managed through coordination between the charging station and backend systems, infrastructure and grid operators can influence charging behavior on a large scale via connected EVs participating in the smart grid. This includes slowing down or pausing charging or even feeding energy back into the grid during peak demand periods. For operators of EV fleets, such as logistics providers or public transport networks, this opens up a potential new revenue stream: they can make the unused battery capacity of parked vehicles temporarily available to the grid, offering valuable flexibility services to energy providers.<\/p>\n

Finally, ISO 15118 ensures encrypted communication and, through standardized automatic authentication, lays the groundwork for Plug & Charge (PnC), making charging at public stations easier for users and enabling additional services.<\/p>\n

Stronger Together: How standards enable V2G interoperability<\/h2>\n
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For Vehicle-to-Grid (V2G) to function at scale, close cooperation is required between all key stakeholders\u2014vehicle manufacturers, charge point operators (CPOs), grid operators, and mobility service providers. The foundation of this collaboration lies in standardized communication protocols that ensure full interoperability across the ecosystem.<\/p>\n

Three key standards are essential for enabling seamless interaction between electric vehicles (EVs), charging infrastructure (EVSE), and energy or mobility platforms (EMSP):<\/p>\n