V2G — vehicle-to-grid — lets an electric car send power from its battery back into the electricity grid, not just draw it out. A compatible car connects through a bidirectional charger, exporting under a utility programme that decides when it feeds the grid and when it simply charges. One car is a small resource; thousands of parked cars, coordinated, become a grid asset.
Key Takeaways
- V2G lets a compatible EV export battery power to the grid through a bidirectional charger, under a utility programme.
- Its value is aggregation: peak support, frequency support and renewable soaking from many coordinated cars.
- It is the grid-facing member of the family — V2L powers devices, V2H powers a home, V2G answers to the utility.
- Four written confirmations gate it: car maker, shared standard, utility approval, and a programme to join. EVDANCE’s current range is one-way charging.
How a V2G Session Works
A car’s battery holds DC; the grid runs on AC. Ordinary charging converts grid AC into battery DC. A bidirectional charger runs that conversion backwards, turning battery DC into grid AC synchronised with the network it feeds:
- The car agrees. The battery management system sets the limits — how much energy may leave, and how low the charge may go — so the car stays ready to drive.
- The charger converts and controls. The bidirectional unit handles the conversion and talks to the car over the bidirectional communication standard, ISO 15118-20.
- The programme decides when. Export is scheduled by the utility programme or aggregator the owner has joined — typically at peak times — and metered separately from imported energy. Outside export windows, the same equipment charges the car one-way.
Our bidirectional charging explainer covers the whole family; this page stays on its grid-facing member.
What the Grid Gets From It
| Grid service | What it means |
|---|---|
| Peak support | Many cars exporting together at the evening peak, sparing the grid extra generation for its hardest hours |
| Frequency support | Fast, small adjustments of export or charging that hold grid frequency steady |
| Soaking up surplus renewables | Cars charging hardest when solar or wind output exceeds demand, storing otherwise-curtailed energy |
None of these needs one car to do much: they work by aggregation — a programme operator pools many vehicles and offers the combined capacity as one resource. That is why V2G runs through programmes, not individual switch-ons — the grid buys coordinated capacity, not one driveway’s worth.
V2G Is Not V2H or V2L
The three are often blurred. V2L (vehicle-to-load) powers a device plugged into the car and never touches the grid. V2H (vehicle-to-home) powers the owner’s house, behind the meter. V2G is the only one whose destination is the grid itself — why it alone involves the utility as a counterparty, with utility approval and a programme governing payment. Which EVs can do bidirectional charging is a short list — capability is a car-by-car question for the car maker’s documents.
What Has to Line Up Before Power Flows Out
- The car maker allows it — bidirectional use enabled on that model, its battery-warranty position stated in the maker’s terms.
- The charger and car share a standard — the same bidirectional protocol on both sides of the cable.
- The utility approves the connection — equipment certified, isolating safely in an outage, and metered; the application and terms are the local utility’s.
- A programme or tariff exists to join — permission to connect and payment for export are separate agreements.
Until all four exist for a specific car, charger and address, V2G remains a plan, not a feature — which is why most deployments today are trials and fleets, a position our piece on whether bidirectional charging is worth it works through.
Where EVDANCE Chargers Fit Today
Plainly: EVDANCE sells no bidirectional charger. The current range — for example the EV-ACT5006T 48 A Level 2 wall charger (NACS, 25 ft, IP65/IP66, ETL/FCC/CE) — charges one-way, which is what almost every home and workplace install still needs; the full range is on our products page. If V2G is a firm future requirement, treat it as a separate procurement against the four confirmations above, not a setting a one-way charger can grow into.
Frequently Asked Questions
Can any EV do V2G?
No. The car must support bidirectional export, the charger must be a bidirectional unit speaking the same standard, and the connection must be approved. Most EVs today charge one-way only — check the car maker’s documents for your model.
Does V2G damage the car battery?
Export is extra cycling, and how a maker treats it sits in its warranty terms — why maker approval is one of the four confirmations. (FuelEconomy.gov frames battery life at 12–15 years in moderate climates, 8–12 in severe ones.)
Do owners get paid for V2G exports?
Only under a programme or tariff that pays for them; terms vary by utility and market, and approval by itself pays nothing. No standard rate exists — your area’s programme document is the only source.
Related Reading
- Bidirectional Charging Explained: V2L, V2H and V2G
- Which EVs Can Do Bidirectional Charging?
- Is Bidirectional Charging Worth It?
