Because a bidirectional charger can send power out of your home as well as draw it in, the utility has to agree to the connection before the export side is switched on — a step called interconnection approval. A normal one-way charger only consumes electricity, so it never raises the question. Approval is the utility checking three things: that the system disconnects safely when the grid fails, that the equipment is certified, and that exported energy is metered properly. It is paperwork, not a judgment on whether bidirectional charging is a good idea.
Key Takeaways
- Interconnection approval is the utility’s sign-off before a bidirectional system may export power.
- It checks certified equipment, safe isolation during outages, export limits and metering.
- It is separate from the electrical permit, and separate from joining a paid V2G programme.
- V2L needs no approval; one-way home charging needs none either.
Why Exporting Is Different From Consuming
| One-way charger | Bidirectional system | |
|---|---|---|
| Direction of flow | Into the car only | Into the car, and back out to the home or grid |
| Who else is affected | Your own circuit | Neighbours on the same lines, and crews repairing them |
| What the utility reviews | Nothing beyond your service connection | The equipment, its behaviour in an outage, and the metering |
The core concern is an outage. If your system kept feeding power into the street while crews worked on lines they believed dead, it would endanger them. Certified bidirectional systems are built to prevent exactly that — they isolate the home the moment the grid fails. Approval is how the utility confirms yours actually does it. Our overview of bidirectional charging: V2L, V2H and V2G explained covers the technology itself.
What the Utility Is Actually Checking
- Certified equipment. The charger and its isolation gear must be listed equipment approved for grid connection — as with the cars in which EVs can do bidirectional charging.
- Safe behaviour in an outage. The system must stop exporting and isolate the home automatically when the grid goes down, and reconnect only when the grid is stable.
- How much can be exported, and when. The utility may set limits that reflect your local lines and service size.
- Metering. Exported energy has to be recorded separately, so bills — and any future programme payments — rest on real numbers.
The U.S. DOE’s vehicle-to-everything collaboration exists because cars, chargers, codes and utility rules all have to line up before this works smoothly, and Australia’s ARENA roadmap works through the same questions. The forms are your own utility’s; there is no single national process.
The Order Things Happen In
- Application first. The system design goes to the utility before installation, usually prepared by your installer — equipment, export size, single-line details.
- Installation by a licensed electrician. The charger, transfer equipment and wiring go in as approved electrical work, with the local permit and inspection that any fixed installation needs.
- Sign-off, then export. Only after the utility accepts the system is the export function enabled — its permission to operate. Charging the car one-way does not wait for this; exporting does.
What Approval Is Not
Three things are often confused with it. It is not the electrical permit for the installation — that is a separate, local track, and both apply. It is not enrolment in a vehicle-to-grid programme — being allowed to connect and being paid to export are different agreements, as our look at whether bidirectional charging is worth it sets out. And it is not needed for vehicle-to-load: power from the car to a plugged-in device never touches the grid connection.
If You Are Installing a Charger Today
Most home charging is one-way and needs no interconnection process: the EVDANCE EV-ACT5006T 48A Level 2 wall charger (hard-wired or NEMA 14-50P, NACS, IP65/IP66, ETL/FCC/CE) simply charges the car, and the EVDANCE EV-ACS4005T 40A NACS portable charger does the same from an outlet. If bidirectional charging is in your future plans, say so at installation time — panel capacity and wiring sized with it in mind make the later approval smaller.
Frequently Asked Questions
Do I need utility approval to use V2L?
No. Vehicle-to-load sends power to a device plugged into the car; nothing is exported to the home’s circuits or the grid, so there is nothing for the utility to approve.
Can I install the bidirectional charger first and apply afterwards?
The hardware can often be installed, but export stays off until the utility signs off — and some utilities want the application before any work starts. Ask about the order before you commit, rather than discovering it at switch-on.
Does approval mean the utility will pay me for exported power?
No. Approval is permission to connect and operate safely. Payment belongs to separate vehicle-to-grid programmes or tariffs, each with its own enrolment — and many approved systems are used only for backup.
Related Reading
- Bidirectional Charging Explained: V2L, V2H and V2G
- Which EVs Can Do Bidirectional Charging?
- When Will Vehicle-to-Home Be Available?
- Is Bidirectional Charging Worth It?
