Your EV Could Power Your Home: Is V2H the Smarter Battery Choice for Australians in 2026?

For years, the formula for an energy-smart Australian home seemed straightforward: install solar panels, add a home battery, and use more of your own electricity instead of buying it from the grid.

But electric vehicles are beginning to change that equation.

The latest PropTrack Origin Australian Home Energy Report shows that around 69% of Australians plan to invest in home energy improvements over the next five years, with intended spending averaging approximately $8,340 per household.

That creates an increasingly important question:

If your next electric vehicle already contains a battery several times larger than a typical home battery, could your car eventually become part of your home energy system?

That is the promise of Vehicle-to-Home (V2H).

What Exactly Is V2H?

Most EV owners are familiar with charging electricity in one direction:

Solar/Grid → EV

V2H allows compatible equipment to reverse that flow:

EV → Home

Instead of your vehicle simply consuming electricity, energy stored in its battery can potentially be supplied back to your household.

This is different from Vehicle-to-Load (V2L), which generally powers individual appliances or equipment. V2H integrates the EV with the home's electrical system, while Vehicle-to-Grid (V2G) goes another step further by allowing compatible vehicles and chargers to export electricity into the grid.

For Australian households with rooftop solar, this opens up an interesting possibility: your future EV could become both transport and a large mobile energy-storage system.

Home Battery vs EV Battery: The Capacity Difference

Capacity is one reason V2H is attracting so much attention.

A typical residential battery installation might provide roughly 10–15 kWh of usable storage.

Many modern electric vehicles carry dramatically larger batteries, often around 50–100 kWh depending on the model.

That means an EV could potentially hold several times the electricity of a conventional household battery.

But capacity alone doesn't make V2H automatically better.

Feature	Home Battery	V2H-Capable EV
Typical storage	Around 10–15 kWh	Often 50–100 kWh
Availability	Usually stays connected	Leaves when you drive
Solar charging	Can capture daytime surplus automatically	Depends on when the vehicle is home
Backup potential	Good for essential household loads	Potentially much greater storage
Main purpose	Household energy storage	Transport + potential energy storage

A stationary battery has one major advantage: it stays home.

If your EV leaves the driveway every weekday morning and returns after sunset, it may miss the period when your solar system produces its largest surplus.

For people working from home, retirees, households with multiple EVs or vehicles parked at home during the day, the economics can look very different.

Why 2026 Is Important for Bidirectional Charging

Australia has already taken important steps toward making bidirectional EV charging easier.

Changes to AS/NZS 4777.2 have addressed bidirectional charging and V2G technology, while the industry continues working through vehicle compatibility, network connections, standards and consumer protections.

However, Australians shouldn't assume that every EV advertised with "bidirectional" capability can already power an entire home.

There is an important distinction between:

V2L: powering appliances directly.

V2H: supplying electricity into a home's electrical system.

V2G: supplying electricity from the vehicle back into the electricity grid.

The vehicle, charger, electrical installation, manufacturer support and relevant network requirements all need to work together.

So before buying an EV specifically for V2H, check whether the manufacturer officially supports the feature in Australia, not simply whether the technology is available overseas.

The Smarter Question: Battery, EV or Both?

For many households, the decision won't actually be "home battery versus EV."

It may eventually be how the two technologies work together.

Option 1: Solar + Home Battery

This remains one of the simplest configurations for households wanting to store daytime solar and use it at night.

Because the battery remains permanently connected, it can continuously absorb excess solar generation and provide energy when required.

Option 2: Solar + EV + V2H

This could become attractive for households already planning to purchase an EV.

Instead of buying a large stationary battery solely for storage, part of the household's energy-storage requirement could potentially be handled by a compatible EV.

The challenge is availability. When the car isn't home, neither is its battery.

Option 3: Solar + Smaller Home Battery + V2H EV

For some future energy-smart homes, this could offer the best balance.

A smaller stationary battery could manage everyday solar shifting while the EV provides significantly greater reserve capacity when connected.

Rather than treating each technology separately, the entire property becomes one connected energy ecosystem.

Before Spending Thousands on V2H, Start With Solar

There's little benefit in having a huge battery if you don't have enough affordable electricity to charge it.

That's why homeowners considering an EV and V2H should first look carefully at their rooftop solar capacity.

A larger solar system may provide enough daytime generation to:

• Run household appliances.

• Charge a stationary battery.

• Charge an EV.

• Reduce grid electricity purchases.

  
  

But the correct size depends on your actual consumption, roof space, export limitations, EV driving requirements and when electricity is used.

Simply installing the biggest possible solar array or battery isn't automatically the most economical solution.

Don't Forget the Infrastructure

V2H requires more than purchasing a compatible electric vehicle and plugging it into an ordinary EV charger.

Depending on the system, a property may require a compatible bidirectional charger, electrical protection and isolation equipment, switchboard work, network approval and equipment specifically supported by the vehicle manufacturer.

Older homes may require additional electrical upgrades.

This is why homeowners should consider the entire energy system before buying individual components.

Your solar system, inverter, battery, EV charger, switchboard and future EV should ideally be planned together.

Could Your EV Become Your Blackout Battery?

One of V2H's most interesting applications is backup power.

Because EV batteries can be substantially larger than conventional residential batteries, a sufficiently charged EV could potentially provide significant household backup capacity when paired with an approved V2H system.

That could be particularly valuable for homes experiencing longer outages.

But backup capability depends on the vehicle, charger, installation and how much charge remains in the car.

You also don't want to use so much stored electricity that there isn't enough range left for your next drive.

Smart energy-management systems will therefore become increasingly important, allowing homeowners to reserve a minimum EV charge while making the remaining capacity available to the house.

Should You Wait for V2H Instead of Buying a Battery?

There isn't one answer for every Australian household.

If you want reliable solar storage today, a stationary home battery has the advantage of being permanently available and supported by an established Australian installation market.

If you're already planning to purchase an EV, however, it makes sense to consider bidirectional capability as part of your longer-term energy strategy.

And if you're upgrading solar, a switchboard or an EV charger now, asking whether those upgrades can accommodate future V2H technology could help avoid expensive modifications later.

A Smarter Energy Future 

The home battery isn't disappearing.

Instead, the definition of a "home battery" is expanding.

Australia is moving toward a future where rooftop solar generates electricity, stationary batteries manage everyday energy, smart appliances shift consumption, and electric vehicles provide another enormous pool of flexible storage.

Your next EV could contain 50, 60, 80 or even 100 kWh of battery capacity sitting in your driveway.

The question isn't simply:

"Do I need a home battery?"

It is increasingly:

"What combination of solar, battery storage, EV charging and V2H will give my home the best value?"

Before investing, compare your household usage, solar generation, vehicle habits and future energy plans rather than choosing technology based on battery size alone.

Planning a solar, battery or EV-ready upgrade?

Explore and compare your options with Smart Energy Market before making the investment. The right system isn't necessarily the biggest one, it's the one designed around how your household actually uses energy.