Bidirectional (V2H and V2G) EV Chargers Guide (2025)

Image by - Sigenenergy

Sigenergy claim to have the first compliant bidirectional charger in Australia. The Sigenergy SigenStor is a hybrid energy storage and charging system that combines solar, battery storage, and bidirectional charging in one unit. Available in 12.5kW and 25kW models,

The Sigen Energy EV DC Bidirectional Charging Station when paired with the Sigen Energy controller/inverter is certified to AS/NZS 4777.2 and is also approved by the Clean Energy Council (CEC).

The Sigenergy system is different to the other bidirectional DC chargers on the list in that the charging system comprises a separate modules comprising: 1. DC EV charger and 2. an external inverter. Since the Sigen inverter is already certified, the system as a whole is certified and compliant.

The other bidirectional charging stations on the list have integrated inverters, therefore the whole charging station needs to be certified to AS/NZS 4777.2.

RedEarth Energy Storage and Ambibox have partnered to manufacture bi-directional V2G/V2H EV chargers in Australia. Three Phase versions are expected to be available by mid 2025. Single phase late 2025.

The Ambibox DC Wallbox is a flexible bidirectional charger supporting both V2G and V2H applications. It offers up to 22kW of charging power. It has even been used in experimental setups to enable bidirectional charging in vehicles not originally designed for it—such as the Tesla Model Y. It’s ideal for both residential and commercial use.

The Ambibox unit has been able to successfully discharge energy from several EV models during testing:

• Tesla Model Y
• BYD Atto 3
• Polestar 2
• Volvo EX30

Wallbox is one of the trailblazers of V2G in Australia with dozens of Quasar 1 V2G ChaDemo chargers installed and connected to Nissan Leaves across the country.

The Wallbox Quasar 2 is a compact bidirectional DC charger offering 11.5kW of power. It’s designed for home use and includes a blackout mode, automatically switching to vehicle-to-home power during an outage. Compatible with the CCS charging standard, it integrates with home energy systems for solar and battery storage management.

The Quasar 2 was on display at Everything Electric Sydney in 2024. While Wallbox have yet to confirm release dates for Australia, expect them to eventually release the Quasar 2 in time.

Solar technology leaders Enphase and SolarEdge are developing bidirectional chargers that integrate with their solar and battery storage systems.

The charger will offer several features:

• Vehicle-to-home (V2H): Allows an EV to function as a large home battery during blackouts.
• Vehicle-to-grid (V2G): Enables an EV battery to discharge to the mains grid, supporting grid services like a Virtual Power Plant (VPP) and supplying energy to the home.
• Green charging: Maximizes the use of on-site solar panels for EV charging.

The device also includes a "black start" feature, which uses a small internal battery to initiate communication when the EV is connected during a blackout, even if it wasn't connected initially.

However, Enphase notes that for V2H and V2G functionality, the vehicle must also support these features. The charger will integrate with Enphase's Ensemble energy management technology and the Enphase app, allowing homeowners to manage their solar, battery storage, and EV charging.

Enphase they plans to bring the charger to market once regulations have been finalised, which occured late last year. Expect them to go on sale as some stage in 2024.

StarCharge are China's largest fully integrated charge point operator with over 3 million charging stations globally. They build everything from residential AC charge points, utility scale batteries to charging station management software. They have confirmed they are eyeing the Australian market for a release of it bidirectional V2G by first half of 2025. The Artemis Series is their latest AC charger.