Tesla’s Cybertruck can now share backup power with a home that already has a Powerwall 3 installed, instead of forcing an owner to pick one system or the other. Tesla enabled the combined setup through Powershare, its vehicle-to-home feature, according to Electrek’s September 10 report.
What changed
Previously, Powershare could back up a house, but not one that already had a Powerwall — owners had to choose one system or the other. Now the two work together: the Powerwall 3 runs the home the way it always has, and the Cybertruck’s battery pack extends how long that backup lasts. Tesla says the combination adds more than three days of runtime, equivalent to roughly nine extra Powerwalls, and both systems support up to 11.5 kilowatts of AC power, per Electrek’s reporting.
What you need to use it
The feature currently requires a Powerwall 3 specifically. InsideEVs reports that support for the older Powerwall 2 and Powerwall+ is expected by the end of the year, not now. You’ll also need Tesla’s own Wall Connector installed at home to enable the power export — a generic Level 2 charger doesn’t support it. Tesla shipped the capability in software version 2026.27.10, which began rolling out to vehicles on September 19 and, as of September 29, is still a staged rollout rather than something every eligible Cybertruck has received — if yours hasn’t gotten it yet, that’s the wave, not a problem with your car.
Why it matters even if you don’t own a Cybertruck
This update is Cybertruck-and-Powerwall-3 only for now, but it signals where Tesla’s home backup strategy is headed: pairing a vehicle’s battery with a stationary one instead of treating them as separate, competing purchases. If you’ve been weighing a Cybertruck against a Powerwall for backup power, or you already own both, this removes a tradeoff you would have faced a month ago.
Photo by Ramesh Kambattan.