Vehicle-to-grid (V2G) gives you the option to run the electricity of your home from the energy stored in the car battery of your electric vehicle. You charge your EV during the day, when electricity rates are low, or solar, then use all that stored energy at night, when electricity from the grid is at peak rates. V2G in Australia could work once it becomes commercially available, and will become an essential part of daily life.
We work with EV charging across Western Australia every day, so this guide comes from real local experience, not theory. Here is a practical look at how V2G Australia works, what it means for WA homes and the steps you can take to take advantage of this upcoming technology.
Facts About V2G
- V2G turns your EV into a mobile home battery.
- EV batteries are far larger than typical home batteries, ranging from 50 to 100 kWh.
- WA homes have batteries that have a capacity of 4 to 14kWh only.
- Charge cheaply during the day and use the stored energy during the evening, when electricity rates are high.
- Current blockers for mainstream use of V2G include grid approvals, manufacturer sign-offs and hardware cost.
- Early data suggest V2G use does not meaningfully increase battery degradation.
How V2G Works for WA Homes
Vehicle-to-grid technology is simple in concept but powerful in practice. Before diving into the details, it helps to understand how an EV battery interacts with your home and the grid. This section explains the fundamentals and why EV batteries are so effective as household energy storage.
V2G works by allowing electricity to flow both into and out of your EV battery through a bidirectional charger. During the day, your EV charges from solar or low-cost daytime electricity. At night, as the sun goes down, your home draws power from the EV battery instead of the grid. This effectively turns your home into a small virtual power plant that relies less on expensive evening grid energy.
Because an EV battery has a larger capacity than most home batteries, it can easily manage evening loads for most residences. WA homes often use only 10 to 15 kWh overnight, while the capacity of EV batteries sits between 20 and 100 kWh according to the Electric Vehicle Database. That makes the EV battery one of the largest storage devices on the property and a practical alternative to investing in a dedicated home battery.
Why WA Homeowners Are Paying Attention
More WA homeowners are asking about V2G in Australia because it provides practical solutions to the rising cost of electricity. The capability of vehicle-to-grid technology, paired with the growth in usage of rooftop solar, all make it a practical step in improving their overall quality of life. This section explains why WA is particularly well-suited for early V2G adoption.
Energy Costs and Solar Conditions
According to an article by The Guardian, Australians are paying much more now for electricity compared to the years before. With the continuous growth of rooftop solar in Australia, instead of feeding any excess generated energy to the grid, V2G can store that excess energy in the EV and use it for transportation needs or home energy requirements when needed.
Since EVs carry a huge battery that can easily support homes, distributors like Western Power and retailers like Synergy see V2G as a tool to reduce peak demand and improve network stability. This is unique to electric vehicles and a major reason interest in V2G continues to grow.
Where V2G in Australia Stands Today
V2G now exists and is undergoing large-scale trials, and is not yet widely available. WA has taken important early steps with trials that prove the concept can work locally. This section outlines what has been tested, what is still needed for mainstream, and why progress depends more on approvals than on technology.
The Promising Future of V2G
The Government of Western Australia shared last September 2025 that Horizon Power’s V2G 12-month trial in Exmouth was a success and offers clear evidence that the technology works. This trial was the first of its kind in Western Australia, successfully proving that managing the two-way flow of energy with the EV battery was possible, highlighting the stability and reliability of the technology. That said, as the interest in V2G continues to grow, every new milestone moves us closer to V2G becoming readily available.
Here are the next steps that will further solidify and accelerate the future of V2G in Australia:
- More tests are needed to acquire real-world data necessary for manufacturers to approve warranties related to V2G applications.
- Highlight the convenience of V2G for remote towns, providing flexibility and stability to the electrical requirements of households in these locations.
- As soon as more EV models supporting V2G enter the market, faster rollout will become a reality.
As of November 2025, shared in an article by the Department of Climate Change, Energy, the Environment and Water, Amber Electric installed 50 vehicle-to-grid (V2G) chargers for a large-scale trial, with more charger units to be installed, through the support of the Australian Renewable Energy Agency (ARENA). The company received $3.2 million in ARENA funding for the project to adapt the very first residential trial of V2G technology at this scale.
With the continuous testing being rolled out in Australia, the involvement of government agencies in these trials shows their prioritisation of discovering and implementing better and more sustainable options for the energy requirements of their citizens.
Battery Wear and Longevity With V2G
Battery life is one of the biggest concerns surrounding V2G, so it deserves a clear explanation. This section outlines what real-world data shows and why V2G does not significantly decrease battery performance and lifespan.
Is My EV Battery Degrading Faster?
Battery wear is sort of the first concern raised when people hear about V2G. EV batteries are valuable, so it makes sense to question whether powering a home will have a substantial toll on battery life. EV batteries are extremely durable, with some having reached 400,000 to 500,000 kilometres while still retaining around 90% of their original capacity. The University of Technology in Sydney shares in an article that there is no consensus showing that V2G shortens the battery life of EVs significantly.
V2G typically uses shallow, well-managed charge cycles rather than deep discharges. Modern EV batteries are designed for high cycling loads, and V2G demands far less stress than long-distance driving or rapid charging.
Do EV Manufacturers Support V2G?
Some do, but most are still cautious. EV manufacturers generally support V2G in principle, but formal approval depends on battery warranties, long-term data, and grid compatibility. Manufacturers need confidence that V2G will not shorten battery life or create warranty risks before enabling it across their model range.
At present:
- A small number of manufacturers support V2G in overseas markets
- Many brands are participating in trials, but have not enabled public rollout
- Others are waiting for clearer regulations and real-world performance data
This is why large-scale trials in WA and across Australia matter. They provide the data manufacturers need to approve V2G without limiting warranties. As trials expand and standards become clearer, manufacturer support is expected to increase quickly.
What About My Home Battery?
Many households wonder whether they still need a dedicated home battery once they have V2G. The answer depends on how you use energy, how much you actually need, and what your EV can deliver. This section explains the trade-offs and why V2G often reduces the need for extra hardware.
For many households, V2G can fulfil the role of a home battery entirely. Below is a comparison between household batteries and commercial batteries from energy.gov.au:
| Features | Household Battery | Commercial Battery |
|---|---|---|
| Capacity | 1 to 14 kWh | 50 kWh or more |
| Purpose | To power a single residence; provide backup power | To power businesses, factories, and larger facilities |
| Cost | Roughly the size of a small fridge | Can be as large as a shipping container |
| Technology | Often uses lithium-ion cells | Uses lithium-ion cells as well, but with a different construction depending on the needs of the facility |
With the high probability of V2G becoming a much more convenient choice, maintaining a dedicated home battery may just be considered optional at some point.
Are All Electric Car Brands Suitable for V2G?
No. Not all electric vehicles are suitable for vehicle-to-grid use. V2G requires specific hardware inside the vehicle that allows electricity to flow both in and out of the battery. Most EVs on Australian roads today are designed for one-way charging only. Even if a car has a large battery, that alone does not mean it can support V2G.
To be V2G-ready, an EV must have:
- A battery management system designed for bidirectional energy flow
- Software that supports exporting energy back to the home or grid
- Manufacturer approval for two-way charging use
At the moment, only a small number of models globally meet these requirements, and even fewer are approved for use in Australia. This is changing, but slowly. Most newer EV platforms are being designed with two-way charging in mind, even if it is not yet activated at purchase.
That is why charger choice matters. Installing the right charging infrastructure now ensures your home is ready when your next EV, or a future software update, enables V2G.
When Will V2G Be Readily Available?
V2G is a proven and tested possibility for home energy needs, but not yet ready for mass rollout in WA. The remaining barriers are mostly regulatory and manufacturer-driven. For V2G to move to mainstream adoption, several steps must be completed. Western Power and Synergy need clear frameworks for two-way energy flow and appropriate tariffs. These rules must ensure fairness, safety, and network stability.
Manufacturers must also certify V2G for each EV model to protect warranties. This includes updates to battery management software and assurances that V2G use is within safe operating limits. Finally, costs need to come down. As more V2G two-way chargers enter the market and more vehicles support the feature, prices will gradually decrease just as they have for standard EV chargers.
V2G FAQs for WA Homeowners
Do all electric vehicles support V2G?
No. Only a small number of EV models currently support vehicle-to-grid, and even then, manufacturer approval is required. Support depends on the vehicle’s onboard hardware, software, and warranty conditions. More V2G-ready models are expected to enter the Australian market over the next few years.
Do I need a special charger for V2G?
Yes. V2G requires a bidirectional charger that can safely send electricity both to and from your EV. Standard home EV chargers only allow one-way charging. Bidirectional chargers are still limited in availability and cost more than conventional chargers, but prices are expected to fall as adoption increases.
Can V2G power my whole home?
In most cases, yes, at least for evening and overnight use. Many WA homes use between 10 and 15 kWh overnight, while EV batteries typically store 50 to 100 kWh. Your ability to power the whole home depends on load size, charger capacity, and how the system is configured.
Does V2G affect my EV warranty?
Potentially. Until manufacturers formally approve V2G for specific models, warranty coverage may be limited. This is one of the main reasons the large-scale rollout has been slow. Ongoing trials in WA and across Australia are helping manufacturers gain the data they need to support full approval.
Is V2G better than installing a home battery?
For many households, yes. An EV battery is significantly larger than most home batteries and can often perform the same role without additional hardware costs. That said, some homes may still benefit from a dedicated battery depending on usage patterns and vehicle availability during the day.
Ready For V2G in Australia?
V2G is industry-changing technology, turning your EV into a home energy source. It cuts evening power bills and makes better use of solar energy. Trials in WA prove the technology works. Once approvals and manufacturer sign-offs are in place, V2G will quickly become an integral part of homes, given the continuous rise of electricity costs. WA is well-positioned to lead the way in Australia’s V2G adoption.
If you are planning a future-ready home or considering a V2G-compatible EV, your charging setup must be ready to accommodate this technology. At ChargingWA, we provide straight advice on the right chargers for your needs, including considerations for V2G integration. If you want a clear plan that works for WA conditions, we are here to help. Talk to us today!
