Bidirectional Charging in Australia Explained: V2G, V2H and What It Costs

Bidirectional charging is real in Australia in 2026. The inverter standard was amended to cover it in November 2024, the first V2G chargers reached the Clean Energy Council’s approved list in late 2025, and distributors now connect them the way they connect solar and home batteries. The two catches are price, at roughly $4,850 to $10,000 for the charger alone as of September 2026 against $750 to $1,650 for a one-way wallbox, and cars: the Nissan Leaf is still the only battery EV whose maker supports it here, with Hyundai, Kia and BYD in trials. Here is how it works, what you can buy, the rules in your state and whether the maths adds up.

V2L, V2H, V2G: which is which

V2L (vehicle-to-load) is the simple one: a 240 V powerpoint fed by the car, no installation, on Hyundai, Kia, BYD, MG and others for years; our V2L guide covers it. V2H (vehicle-to-home) feeds your switchboard so the car runs the house like a home battery on wheels; our guide to using an EV as a home battery works out how many days a given car could keep the lights on. V2G (vehicle-to-grid) goes a step further and exports to the grid for payment. V2H and V2G both need a bidirectional charger with a built-in inverter, network approval and a car that plays along, which is why they arrived years after V2L. Our list of which EVs support V2G and V2H tracks every model.

How does bidirectional charging actually work?

A normal home charger is a smart switch: the car’s own onboard charger converts AC from the wall into DC for the battery. A bidirectional charger is a DC unit that talks to the battery directly, so the inverter that turns DC back into 230 V AC lives in the wallbox. Energex describes the two ways it can be wired: DC-coupled into a hybrid solar inverter that also runs your panels and any stationary battery (the Sigenergy approach, where the EV module slots into a SigenStor stack), or as a stand-alone unit with its own inverter, AC-coupled to the switchboard (Energex).

The conversation between charger and car is the hard part. Over CCS2 it runs on the ISO 15118 protocol, and the second-generation version, ISO 15118-20, is the one written for bidirectional power transfer: it carries the messages for how much the car will export, the battery floor and the cyber-security handshake. The Nissan Leaf does the same job over CHAdeMO, which was designed for it from the start. Hyundai’s first Australian V2G discharge, an Ioniq 9 on a StarCharge Halo in June 2026, was notable precisely because it used ISO 15118-20 rather than a workaround (The Driven).

Is it actually allowed now?

Yes. Standards Australia published amendment 2 to AS/NZS 4777.2:2020 in November 2024, which is the document distributors cite when they approve a bidirectional charger (Ausgrid). From there the path is the same as a home battery: the charger must be on the Clean Energy Council’s approved inverter list, the installer lodges an embedded-generation connection application with your distributor, and the distributor’s export limits apply. South Australia allowed the first connections outside trials back in 2022 for the Leaf and Wallbox Quasar; the rest of the country caught up through 2025 as CCS2 units were listed.

One date to know if you are in South Australia: SA Power Networks says V2G chargers installed on or after 1 July 2026 must meet demand-response requirements, with OCPP 2.1 and the coming AS 5438 standard, so the charger can respond to the network (SA Power Networks).

What are the rules in your state?

What can you buy?

The market is young and moving quarter to quarter; as of September 2026 the named players are:

Treat all of these as indicative. Amber Electric, which runs the ARENA-backed V2G program, puts installation at another $2,000 to $4,000 depending on the switchboard, and quotes should come from installers who confirm CEC listing and your distributor’s rules at the time of purchase. More entrants, including Enphase, have flagged Australian products, which is the main reason to expect prices to fall. None of it is eligible for the Cheaper Home Batteries Program, whose rules exclude electric vehicles and cover stationary batteries only.

Is it safe?

The grid side is settled: an approved bidirectional charger meets the same anti-islanding and export rules as a home battery inverter, which is the whole point of the standard amendment. The open question is the car side. Hyundai’s V2G lead told The Driven in March 2026 that some chargers on sale achieve discharge by working around the car’s software rather than negotiating with it, and that Hyundai’s testers had seen cars discharging while the dashboard showed 0 kW, discharging at up to 30 kW, and being drawn down past their built-in safety buffers (The Driven). Hyundai’s submission to the ACT government asked that trials use carmaker-approved equipment on ISO 15118-20 and warned of “potential safety risk, vehicle damage and impacts on manufacturer warranties and building insurance”.

The practical reading: a CEC-approved charger is safe for your house and the grid, but whether it is safe for your particular car depends on the carmaker having agreed to the handshake. That is why the carmaker announcements matter more than the charger listings.

Which cars can do it?

This is the real bottleneck, and the honest picture in September 2026 is one supported battery EV. The Nissan Leaf has carmaker-backed V2G over CHAdeMO and has since 2022. Mitsubishi markets the Outlander and Eclipse Cross plug-in hybrids as bidirectional with an approved charger. Hyundai (Ioniq 5, 6 and 9), Kia (EV3, EV6, EV9) and BYD (Atto 3) are validating their cars in Australian trials and have said the feature will arrive by software, and Kia has told EV Central it is comfortable extending warranty cover to V2G. A dozen more, including the Tesla Model 3 and Y, Polestar 2 and Volvo EX40, have been discharged in a charger maker’s independent tests that the carmakers do not recognise.

Two warnings. Having V2L does not mean a car can do V2G; they are different systems. And a car working in a trial or on a charger maker’s list is not the same as the manufacturer warranting daily bidirectional cycling of your battery. Before buying a $5,000-plus charger, get it in writing that your exact model, year and software version is supported by that charger and blessed by the carmaker. Our full per-model list shows where every car we track stands.

Do the numbers stack up?

Run the honest version. A household drawing 10 kWh across the evening peak at a 30c/kWh rate, supplied instead from an EV charged overnight at around 8c or from solar surplus at a 5c feed-in, saves roughly $2.20 to $2.50 a day, call it $800 to $900 a year. Against $7,000 to $14,000 installed, that is a payback measured in a decade or more, longer than most people keep a car. Our Powerwall-versus-car comparison works the full numbers, including the rebate the wall battery gets and the car does not.

The maths gets better fast in specific situations: wholesale-exposed plans that pay serious money for evening exports, retailer programs that carry the hardware (Origin bundles a BYD Atto 3 and a Halo charger on subscription with free home charging; AGL offers discounted chargers with Hyundai, Kia, BYD and Zeekr as partners; Amber’s program is expanding by 950 customers on ARENA funding), or genuine blackout-backup value in outage-prone areas.

What are the drawbacks?

Price is the obvious one, and the rebate gap makes it worse: a stationary battery gets roughly 30 per cent off under the federal program and a bidirectional charger gets nothing. The car has to be home to be useful, which suits work-from-home households and second cars more than commuters. Warranty cover is the biggest risk today, because most carmakers have not yet written V2G into their terms. The battery does extra work: the government’s own guidance says that “may lead to slightly faster battery wear over time” (energy.gov.au). CHAdeMO, the plug on the only supported car, is being phased out, and the ACT government notes there will be very few CEC-certified chargers compatible with it. And retailer V2G plans are immature: the ACT’s own guidance says financial incentives “may be small unless network demand is very high” (ACT Climate Choices). Installation can also mean a smart meter and a switchboard upgrade, which is why quotes vary so widely; our charger installation guide covers what a switchboard upgrade involves.

Where is it heading in Australia?

The policy scaffolding is built. ARENA’s National Roadmap for Bidirectional EV Charging, released with the RACE for 2030 research centre in early 2025, sets out the path to commercial adoption; the ACT’s Realising Electric Vehicle-to-Grid Services trial with Nissan Leafs wrapped up in November 2025 with a set of published business-model and lessons-learnt reports; and in June 2026 the government put a further $13.5 million through ARENA into Amber Electric’s V2G and smart-charging programs, on top of $3.2 million in 2024 (energy.gov.au). Hyundai’s statement on its Ioniq 9 test cited ARENA modelling of up to 2.6 million Australian homes adopting V2G by 2040.

What the market is waiting for is the carmakers. Hyundai and Kia have both pointed to announcements for their Ioniq and EV ranges, BYD is the partner in three retailer programs, and CarsGuide’s read of the industry in September 2026 is a full-scale launch in 2027 (CarsGuide). On the hardware side, more CCS2 chargers reaching the CEC list and the demand-response requirements coming through networks like SA Power Networks point to cheaper, smarter units in the second wave.

Should you wait?

Most people: yes. Charge the car on an overnight tariff or solar with a normal home charger for a tenth of the price, enjoy V2L for free if your car has it, and let early adopters fund the market’s learning curve. Revisit when your carmaker announces support for your model, when hardware lands under $3,000 installed, or when your retailer offers a program that carries part of the cost. If you are the early-adopter household (a Leaf or a trial place, big solar, a wholesale plan, a cooperative distributor), this is the first year the pieces genuinely connect, and the technology is no longer the thing standing in your way.