An electric car spends most of its life parked, with a large battery sitting idle. Vehicle-to-grid, or V2G, is the idea of letting that battery send energy back to the grid when it is needed, and earning the owner money in return.
The family of bidirectional charging
- V2L (vehicle-to-load): the car powers appliances or tools directly. Some EVs already offer this.
- V2H / V2B (vehicle-to-home or building): the car powers a home or building, for example during an outage or at peak-tariff hours.
- V2G (vehicle-to-grid): the car exports energy to the grid, coordinated with the utility.
Why it is interesting
- Grid support: thousands of parked EVs could act like a large, distributed battery during peaks.
- Renewable energy: cars could charge when solar power is plentiful and give some back in the evening.
- Income: owners and fleets could be paid for the energy and services they provide.
What V2G needs
- Vehicles that support it: the car must be able to export power and allow it in its warranty terms.
- Bidirectional chargers: most chargers today only charge one way.
- Communication standards: charger, car and grid operator must talk to each other securely.
- Rules and tariffs: clear regulations on grid connection, metering and payment for exported energy.
- Utility participation: DISCOMs need systems to call on and pay for this flexibility.
Where India stands
Bidirectional charging is still at an early, pilot stage in India. Most EVs sold here are two- and three-wheelers, and the frameworks for paying vehicle owners for grid services are not yet widely in place. V2L features in some cars and V2H or V2B uses are likely to come first, because they need less coordination with the grid.
When it could matter
V2G becomes worthwhile once there are enough compatible vehicles parked in predictable places, plus clear rules and payments. Fleets and buses at depots are strong early candidates, because large batteries sit in one place for long, predictable periods.
What to do now
- When planning depots or large sites, ask whether chargers can be upgraded to bidirectional later.
- Choose software that supports open standards and smart charging today.
- Follow DISCOM and regulator announcements on pilots and tariffs.
EVee Buddy designs sites with future upgrades in mind, so new capabilities like V2G can be added when the market is ready.