Who Controls the Battery in Your Driveway?

by | Nov 6, 2026 | Energy

Who Controls the Battery in Your Driveway?

Tesla has deployed a software update affecting vehicle owners in Australia that reportedly disables third-party bidirectional charging equipment used to power homes, according to reports from owners and industry observers. The update, part of the 2026.38 software branch deployed beginning in October, appears to cut power discharge within minutes of initiation, leaving affected customers unable to use chargers from manufacturers including Sigenergy, EleJoy, and Tlyard. Users have documented the issue on owner forums, noting that previous workarounds no longer function and that Tesla’s official release notes make no mention of the change.

The timing of the update presents a notable contrast across markets. While Australian owners experienced the disabling of third-party equipment, Tesla simultaneously introduced Powershare with Powerwall to North American owners, allowing vehicles to serve as home backup power sources. However, Tesla Australia has indicated that Powershare cannot be retrofitted to existing vehicles in that country, leaving current Tesla owners without either Tesla’s native solution or functional third-party alternatives if the software restrictions remain in place.

The situation highlights broader questions regarding device control and interoperability in vehicle technology. Tesla’s warranty documentation in Australia states that using the battery as a stationary power source may void coverage, though the company’s warranty page specifies exclusions only for third-party adapters rather than blanket warranty denial. Under Australian Consumer Law, such contractual restrictions cannot override statutory protections, a principle established in prior legal proceedings involving other technology companies.

Industry experts and regulators have noted that functional interoperability represents a critical component of emerging grid infrastructure, particularly as household-owned vehicle batteries become integral to energy systems. The incident raises questions about disclosure requirements for software changes, consumer rights regarding equipment compatibility, and regulatory frameworks governing vehicle-to-grid technology. The situation parallels ongoing debates in other sectors regarding repair rights and manufacturer control over connected devices.

Tesla has not publicly provided technical justification for the reported restrictions. The author of the article has filed a formal complaint with Australia’s competition regulator and requested that Tesla disclose whether legitimate safety or engineering concerns warrant the limitation, or whether alternative approaches such as certified partnerships or published technical standards might address any underlying issues without restricting owner options.

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