Can My EV Power My House? Vehicle-to-Home (V2H) Explained
Vehicle-to-Home (V2H) technology lets you use your electric vehicle's battery as a backup power source for your home. With EVs carrying 40–100kWh of storage, your car can power a household for 1–3 days during a blackout. In Australia, V2H is still emerging — the only commercially available setup as of 2026 is the Wallbox Quasar 2 paired with a Kia EV9, though the AGL V2G trial is expanding to more brands.
Important Safety Warning
V2H is not a simple EV charger install. Incorrect setup can backfeed the grid, which is illegal and dangerous. Only use a licensed electrician familiar with bidirectional charging systems.
Common Signs & Symptoms
- Interested in backup power without a separate home battery
- Already own or plan to buy a V2H-capable EV (e.g. Kia EV9 with Wallbox Quasar 2 — currently the only commercially available V2H setup in Australia)
- Want to reduce energy bills by discharging your EV during expensive peak periods
- Looking for whole-home backup capability
Potential Causes
Why is this happening? Here are the most common reasons we see in WA homes:
- V2H requires a bidirectional EV charger (not all chargers support this)
- Your EV must be V2H-capable — check your vehicle's specs before investing
- A compatible inverter/gateway device is needed to connect the EV to your home circuits
- Switchboard may need upgrading to support the additional load management
Troubleshooting Steps (DIY Safe)
- 1Confirm your EV supports V2H or V2G (Vehicle-to-Grid) — check the manufacturer spec sheet.
- 2Research compatible bidirectional chargers — the Wallbox Quasar 2 is currently the only commercially available V2H charger in Australia (for the Kia EV9). More options are coming as the AGL V2G trial expands.
- 3Check your switchboard: V2H systems need a hybrid inverter or dedicated gateway and sufficient circuit capacity.
- 4Talk to a licensed electrician experienced in home energy systems — V2H installation involves more than just mounting a charger.
DIY vs Professional
In Western Australia, it is illegal to perform your own electrical work. While you can change a lightbulb or reset a switch, anything involving wiring or removing fittings must be done by a licensed electrician.
How we can help
If you haven't been able to resolve the issue with the steps above, it's time to call in the experts. Sparky Local carries the necessary diagnostic tools to identify the root cause quickly and safely.
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