Context: The Kerala State Electricity Board (KSEB) and the Indian Institute of Technology Bombay (IIT Bombay) have initiated a pilot project to explore the implementation of Vehicle-to-Grid (V2G) technology across the State. This collaboration aims to assess the feasibility of integrating Electric Vehicles (EVs) into the State’s power grid.
Relevance of the topic:
Prelims: Key facts related to V2G Technologies.
Mains: V2G Technology - Status, benefits, global application, challenges.
Vehicle-to-Grid (V2G) Technology
- Vehicle-to-Grid (V2G) technology allows Electric Vehicles (EVs) to not only draw electricity from the grid (for charging) but also send electricity back to the grid when required.
- When an EV is not in use (e.g., parked at home), and is connected to a bi-directional charger, it can interact with the grid by discharging power back into it.
- This transforms EVs from mere transportation devices into decentralised energy storage units, which can be instrumental in balancing electricity supply and demand.
- The ability of EV batteries to transfer power encompasses many possibilities such as V2G, Vehicle to Home (V2H), Vehicle to Vehicle (V2V) etc. Among these, V2G is the most popular use case.
Benefits of V2G Technology
- Decentralised storage: EVs are mobile energy storage units that can operate independently of centralised power plants.
- Facilitates Renewable Energy Integration: EVs can store surplus energy generated during high RE output periods and feed it back during low generation times. Provides backup during peak load conditions.
- Emergency power source: In scenarios of climate-induced disasters (E.g., floods, storms), EVs can act as emergency power sources for homes, hospitals, or relief centers.
Global Application of V2G
EVs have emerged as a cost-effective form of distributed energy storage, with owners incentivised to supply power back to the grid.
- V2G Technologies have gained significant attraction in mature EV markets such as Europe and the U.S.
- In the U.K. and the Netherlands, EV owners are compensated for supplying excess energy back to the grid during peak hours.
- In places like California, EV users are actively encouraged to participate in the ancillary services segment of the electricity market, helping improve grid stability and reliability.
Status of V2G Technology in India
In India, V2G integration is currently in a nascent stage, facing regulatory and infrastructure challenges.
- Most of the current planning around EVs in India is aimed at expanding EV charging networks rather than enabling bidirectional power flow.
- Some Distribution Companies (DISCOMs) have initiated pilot projects focusing on smart charging and exploring V2G capabilities.
- The Central Electricity Authority (CEA) has constituted a committee to frame guidelines for reverse charging — that is, enabling electricity to flow from EV batteries back to the grid. This committee has highlighted smart charging as a key enabler to ensure EV growth with minimal impact on the grid.
Challenges
- India’s electricity market is highly centralised and regulated and the current structure is not suited for decentralised solutions like EVs to send power back to the grid.
- Variable nature of RE and mismatches between electricity supply and demand.
- Most EV charging stations in India are unidirectional, and there is limited availability of bi-directional chargers compatible with V2G technology.
- There is no clear compensation mechanism for EV owners who might supply power back to the grid, making the proposition unattractive for consumers.
To mainstream Vehicle-to-Grid (V2G) Technology, supportive regulatory changes are needed.