A bloke I know in Castlemaine bought a Nissan Leaf last year specifically so he could run his house off it during a storm outage. He’s one of maybe a few thousand Australians who can actually do that right now. Vehicle-to-grid sounds like it should be everywhere by now: the idea’s been spruiked at every EV conference I’ve sat through since 2021, but the gap between the concept and what you can buy and install this week is still wider than most of the marketing suggests.
So let’s separate the three things people lump together under “V2G”: vehicle-to-load (running an appliance or your fridge off the car’s battery via a plug), vehicle-to-home (the car backs up your house through your switchboard), and vehicle-to-grid proper (the car exports back into the network and gets paid for it, coordinated by a retailer or aggregator). Only the first is genuinely mainstream here. The second is a live but small market. The third is still mostly trials, with a handful of commercial offers starting to appear.
What’s actually certified and selling #
The compatibility problem is the first wall most buyers hit. Bidirectional charging needs a car built for it – not every EV can push power back out, and a charger that supports the protocol the car uses. In Australia that’s effectively meant CHAdeMO-based bidirectional hardware for cars like the Nissan Leaf, and a slower rollout of CCS2 bidirectional units for newer models as manufacturers and charger makers finish certification. I’ve covered the standards split before, because it genuinely trips people up at the dealership – see our explainer on what EV charging standards mean for you if you want the plug-by-plug detail.
The practical upshot: if you want vehicle-to-home today, your shortlist of compatible cars is short, and your shortlist of compatible chargers is shorter again. Hardware from companies like Wallbox and a handful of local integrators has started appearing with AS/NZS 4777 inverter compliance sorted, which is the bit that actually matters for connecting a bidirectional charger to your switchboard legally. That standard, the same one that governs grid-connected solar inverters, is why this has taken years rather than months. Nobody’s cutting corners on islanding protection just to ship a product faster, and I don’t think they should.
The money question nobody answers cleanly #
Here’s where I get a bit short with the spruikers. Ask a vendor what a V2G setup actually saves you annually and you’ll get a demonstration using peak-rate arbitrage assumptions that don’t match how most households are billed, paired with a battery degradation estimate that’s suspiciously generous. The honest version: a bidirectional charger costs meaningfully more than a one-way fast charger, often several thousand dollars more, and the payback depends entirely on whether you’re on a tariff structure that rewards exporting at the right times, whether your retailer even offers an export arrangement for EVs, and how hard you’re willing to be on your battery’s cycle life to chase it.
Compare that to a stationary home battery, where the payback maths is at least settled enough to argue about with real numbers. I went through that in home battery payback: does it stack up yet. V2G adds a genuinely useful second asset (a car you were buying anyway) but also adds complexity: your car has to be plugged in and charged at the right state when the grid needs it, which doesn’t always line up with when you actually need the car.
What the trials have shown so far #
ARENA and various state programmes have run V2G pilots since the early 2020s: fleet trials with government and utility vehicles, residential pilots in the ACT and South Australia, and smaller commercial demonstrations. The consistent finding across most of them: the technology works technically – the cars can do it, the inverters can do it, but the economics only stack up when you bundle the car into a broader virtual power plant arrangement rather than treating it as a standalone asset. That’s roughly the same conclusion I came to writing about virtual power plants: the 2026 reality check for stationary batteries. A single EV battery exporting into the market on its own, metered and settled individually, is an administrative headache that doesn’t pay for itself. A fleet of them coordinated by an aggregator, smoothing a retailer’s exposure to five-minute price swings, starts to look like a real asset.
AEMO’s own work on distributed energy resources keeps flagging the same structural issue: the market wasn’t built with millions of small, mobile, intermittently-connected batteries in mind. The settlement rules, the metering standards, the aggregation frameworks: all of it was designed around big generators and big loads. Retrofitting that for a car that might be in the driveway, might be at the office, might be at your sister’s place in Ballarat, is a genuinely hard systems problem, not a marketing problem.
Why retailers are cautious, not stalling #
I don’t think the slow commercial rollout here is a conspiracy or corporate foot-dragging, whatever the comment sections say. AGL and Origin have both signalled interest in EV-integrated offers as part of their broader consumer energy resources strategy. I wrote about how the two gentailers are positioning themselves more broadly in AGL versus Origin: two gentailer strategies compared, but a retailer putting its brand on a V2G tariff is taking on warranty risk it doesn’t fully control. If a car maker’s warranty terms get murky about degradation caused by grid-export cycling, that liability conversation happens between the retailer, the manufacturer and the customer, and nobody wants to be the one left holding it. Until car manufacturers get more explicit about warranty coverage for bidirectional use – some already exclude it outright in the fine print – I’d expect retailers to keep offers modest and opt-in rather than pushing V2G as a mainstream product.
The regulatory bit that’s actually moving #
This is where I’ll admit the picture is better than the retail experience suggests. The Consumer Energy Resources roadmap, which I covered in detail separately, is specifically trying to sort out the standards and connection pathways that have made bidirectional charging slow to certify – see the Consumer Energy Resources roadmap: what it means on your roof for the full picture. The AEMC and the Clean Energy Regulator have both been working through how distributed resources, EVs included, get metered, settled and counted toward emissions and reliability targets. None of this is glamorous. All of it has to happen before V2G stops being a trial and becomes a product category with a normal customer journey: compare a system, buy it, get it installed by a licensed sparky, start earning or saving within a predictable timeframe.
The Clean Energy Regulator’s work on Vehicle Emissions and the Electric Vehicle Council’s own EV sales data both point to the same underlying tailwind: the EV fleet is growing fast enough that even a conservative uptake of bidirectional-capable models over the next few years would represent a non-trivial pool of distributed storage. Whether that pool ever gets properly tapped is a policy and standards question as much as a technology one.
What I’d actually tell someone shopping right now #
If you’re buying an EV today purely to use it as a backup power source, buy a car compatible with vehicle-to-home and treat vehicle-to-grid earnings as a bonus you might get in a year or two, not a line item in your household budget now. If you’re buying an EV for driving and the V2G capability is a nice-to-have, don’t let a vendor talk you into paying a premium for hardware you won’t meaningfully use for years. I’d rather see someone spend that money on a proper home battery with a settled payback case, or just wait.
My own experience restoring an old steel-frame bicycle a few months back taught me something that applies oddly well here: the parts that look finished are rarely the parts that are actually finished. A repainted frame with second-hand hubs can look like a complete bike and ride like one for a weekend, right up until a bearing you didn’t service properly lets go on a hill. V2G in Australia right now is a bit like that: the visible bits, the cars, the chargers, look close to done. The bits underneath, the tariffs, the warranty terms, the settlement rules, are still being serviced.
None of that makes it vapourware. The engineering works, the pilots have proven it, and the direction of travel in the regulatory bodies is toward making it easier, not harder. But “technically proven” and “ready for an ordinary household to buy with confidence” are different claims, and right now in Australia, V2G sits closer to the first than the second.
– Sofia Marchetti, EV & Electrification Correspondent
Photo by CHUTTERSNAP on Unsplash