Vehicle-to-home EV charging in Perth: bi-directional charging explained

A standard EV charger moves electricity one way: from your home into your car's battery. Bi-directional charging technology reverses this, allowing your EV's battery to power your home (V2H — vehicle-to-home) or export back to the grid (V2G — vehicle-to-grid). As of 2026, this technology exists in Perth but remains limited by vehicle model availability and regulatory constraints.

V2H vs V2G: what's the difference?

V2H (vehicle-to-home): Your EV battery powers loads in your home. This is primarily useful during grid outages — the EV acts as a very large battery backup. The power stays within your property and doesn't export to the grid.

V2G (vehicle-to-grid): Your EV battery exports electricity to the grid, potentially earning revenue or reducing peak demand payments. This requires a Synergy export agreement and compatible metering — more complex than V2H.

In Australia, V2H is more practically accessible than V2G at this stage. V2G export from EVs in WA requires bilateral agreement with Synergy and is not yet widely available as a residential product.

Which EVs support bi-directional charging in Australia?

As of mid-2026, bi-directional charging capability in vehicles sold in Australia is limited:

Nissan Leaf (CHAdeMO): The Nissan Leaf (earlier models with CHAdeMO port, not the newer CCS2 models) supports V2H via the CHAdeMO standard. The Nissan Leaf e+ 62kWh provides up to 40kWh usable for V2H purposes. Requires a CHAdeMO-capable V2H unit (see below). Note: Nissan has transitioned away from CHAdeMO in newer models — only the CHAdeMO-equipped Leaf supports this.

BYD Atto 3: BYD announced V2L (vehicle-to-load) capability in some markets. As of mid-2026, V2H integration with home energy systems in Australia remains in limited rollout — check with your BYD dealer for current status.

Mitsubishi Outlander PHEV: Supports V2H via CHAdeMO. The PHEV battery is smaller (~13.8kWh) but usable for limited backup. Same CHAdeMO requirement as the Leaf.

Tesla (all models): Tesla does not currently support V2H or V2G in Australia. The Powerwall is Tesla's answer to home battery storage — it is a separate product. Tesla has announced V2H capability for future models in some markets but this is not currently available in Australia.

Hyundai IONIQ 5 / Kia EV6 / Genesis GV60: Support V2L (vehicle-to-load) via a 3.6kW 230V socket in the vehicle. This can power appliances directly from the car's battery — not the same as home integration, but useful during outages for critical loads.

V2H hardware available in Perth

Wallbox Quasar 2: A bi-directional AC charger compatible with CCS2 vehicles. As of mid-2026, availability in Australia is in early rollout phase. Designed for vehicles with bi-directional CCS2 support — limited Australian vehicle compatibility at present.

CHAdeMO V2H units: Several Japanese-origin units (from manufacturers such as Nichicon) support CHAdeMO-based V2H. Compatible with the Nissan Leaf CHAdeMO models. These are typically installed as part of a home energy management system with transfer switch. Cost: $5,000–$12,000 installed, depending on configuration and transfer switch requirements.

SolarEdge Energy Hub + bi-directional inverter: SolarEdge's system is designed to eventually support V2G integration, but as of mid-2026 full V2G functionality via SolarEdge in WA is not yet commercially available for residential customers.

What V2H actually provides

A Nissan Leaf e+ with 40kWh usable V2H capacity can provide:

• Whole-home backup (3–5 kW average load): 8–13 hours
• Essential loads only (fridge, lighting, phone charging, ~0.5 kW): 80 hours
• Split system air conditioning (1 kW running): 40 hours

Compared to a standard 10kWh home battery (9kWh usable), the Leaf's V2H provides 4× the backup capacity. For Perth households where the car is typically parked at home overnight and during weekends, this is genuinely useful resilience.

The practical limit is: the car must be plugged in. If you drive the car during an outage, you lose the backup source.

V2G (export to grid) in WA

Selling electricity from your EV battery back to the grid (V2G) requires:

1. A V2G-capable vehicle and charger
2. A Synergy-approved export arrangement (Synergy must approve the connection)
3. A bi-directional meter capable of recording EV export separately from solar export

As of mid-2026, Synergy does not have a standard residential V2G tariff product. The WA government's EV roadmap includes V2G as a future consideration, but regulatory and metering infrastructure for residential V2G is not yet in place across the SWIS.

For Perth households, V2G is a watch-this-space technology rather than an available product.

Is V2H worth it now for Perth?

Good fit if:

• You own or plan to buy a Nissan Leaf (CHAdeMO) or Mitsubishi Outlander PHEV
• You have a medical need or heat sensitivity that makes backup power a genuine priority
• You're building a new home and want a future-proof electrical setup with transfer switch pre-wiring
• You're interested in early adoption and understand the cost/benefit is marginal today

Not worth it yet if:

• You're buying a new EV — most new EV models in Australia do not support full V2H
• You want a financially-justified investment — the installed cost ($5,000–$12,000) for CHAdeMO V2H vs a dedicated 10kWh home battery ($8,000–$14,000 installed) is comparable, and the battery is available today for any vehicle
• You want grid export revenue (V2G) — this isn't available in WA yet

What to watch in the next 2 years

The EV bi-directional landscape is changing. Key developments to monitor:

• CCS2 bi-directional charging: More mainstream than CHAdeMO, wider vehicle compatibility expected in 2026–2027 as European and Korean manufacturers roll out bi-directional CCS2 (Hyundai, Kia, and others have announced V2H for upcoming models)
• Synergy V2G product: WA is consulting on V2G integration — a future Synergy VPP offering for EV owners is plausible within 2–3 years
• ARENA funding: The Australian Renewable Energy Agency has funded V2G trials; commercial products are downstream of these trials

V2H is real technology available in Perth for CHAdeMO-equipped vehicles (Nissan Leaf, Mitsubishi Outlander PHEV) but requires a $5,000–$12,000 bi-directional charger investment. For most Perth households buying an EV in 2026, a conventional home battery is more practical. Monitor the CCS2 bi-directional rollout from Hyundai/Kia for mainstream V2H access within 2–3 years.