When Tesla first launched the Cybertruck, its bidirectional charging tech was one of its most exciting hardware promises. The feature, dubbed Powershare, allows the electric pickup to run high-draw appliances or act as a whole-home backup generator during grid failures. However, an annoying software limitation locked out owners who already invested in Tesla’s residential batteries. If you had a Powerwall, you couldn’t connect your Cybertruck to run alongside it.
That restriction is finally gone. Tesla today officially announced on X that whole-home backup integration between Powerwall and Cybertruck is live. “This extends your home backup by over 3 days, equivalent to 9 additional Powerwalls,” Tesla said.
Powerwall 3 & I can now power your house together⁰ ⁰This extends your home backup by over 3 days, equivalent to 9 additional Powerwalls pic.twitter.com/8G2twIm6AN
— Cybertruck (@cybertruck) September 10, 2026
Tesla also added that the functionality will expand to Powerwall 2+ “later this year.” Given that Powerwall and Cybertruck integration was originally targeted for the third quarter of 2025, having to wait until Q3 2026 for the initial Powerwall 3 rollout means owners can only cross their fingers that legacy hardware support truly lands before the year wraps up. Now that the feature is available on the newest Powerwalls, though, adapting it for older configurations should hopefully move along faster.
Eliminating Gateways and Simplifying Hardware Requirements
The Cybertruck was the first Tesla to debut Powershare (check out our full guide on Tesla’s bidirectional power transfer features). Since then, other models like the Model Y Performance and three-row, six-seat Model Y L have followed thanks to dedicated Powershare adapters — and even more could follow suit.
Previously, Cybertruck owners looking to back up their homes were forced to install a dedicated Powershare Gateway to handle islanding and grid disconnection. For households already running a Powerwall, however, buying another standalone gateway isn’t necessary. With this update, Powerwall 3 owners can simply plug in their Cybertrucks, and the existing Powerwall Gateway will handle grid disconnect duties automatically. Homes only need a compatible Tesla Universal Wall Connector or Wall Connector 3 paired with the truck.
Plugging in enables two-way energy flow. The Cybertruck can feed power directly into the home circuit or even charge the Powerwall, and the home can draw from both packs simultaneously when utility power is knocked out.
Overcoming Software Roadblocks
Merging vehicle batteries with stationary home storage proved trickier than expected — the integration wouldn’t have taken this long otherwise. Tesla had to navigate complex grid utility regulations and rewrite communication protocols between vehicle inverters and home gateways to prevent electrical conflicts.
“This presented a few different microgrid stability challenges and in particular ensuring robust communication and coordination to react to load changes in real time took some effort, but the energy team and vehicle team worked hand in hand to get it to out to the customer fleet,” lead Cybertruck engineer Wes Morrill explained.
This new feature resolves a longstanding incompatibility between Tesla products and also pairs nicely with Tesla’s broader home energy ambitions. Plugging a 123 kWh truck battery into a home energy loop turns the vehicle into a massive energy reservoir. For households in storm-prone regions, pooling home units with vehicle storage delivers peace of mind for when the grid goes dark.
