Tesla Model 3 and Model Y Gain Powershare Home Backup Capability
Feature requires Powerwall 3 and extends home backup by over two days for eligible new vehicles.
Tesla has expanded its Powershare Home Backup feature to include the Model 3 and Model Y, allowing these vehicles to serve as backup batteries for homes when paired with a Powerwall 3.
What Happened
Tesla Energy announced that Powershare Home Backup is now available for new Model 3 and Model Y vehicles. The company states that the feature can extend home backup duration by over two days. This capability was previously exclusive to the Cybertruck, which began supporting Powershare with Powerwall 3 last month. The rollout aligns with vehicles ordered in the U.S. or Puerto Rico on or after October 1, 2026, though some earlier cars may also qualify. Owners can verify eligibility by checking for "Powershare Support: Enabled" under Additional Vehicle Information on the touchscreen. The feature is enabled through software update 2026.38.3.
Why It Matters
This expansion brings bidirectional charging to Tesla’s highest-volume models, leveraging hardware many owners already possess. For homes equipped with a Powerwall 3 and either a Wall Connector 3 or Universal Wall Connector, no additional equipment is required. During a grid outage, the Powerwall and vehicle work together to provide up to 11.52 kW of continuous power. Tesla estimates that a home using 30 kWh per day can be backed up for over two days if the car starts at a 90 percent charge. This contrasts with the Cybertruck, which offers more than three days of backup under similar conditions. However, the feature is not available for Model S or Model X, and Grid Support, which allows selling power back to the utility, remains exclusive to the Cybertruck in Texas.
The Bottom Line
Tesla has successfully extended its home backup technology from the Cybertruck to its mainstream sedan and SUV models, requiring a Powerwall 3 for functionality. While this enhances the utility of the Model 3 and Model Y for owners with existing Tesla energy hardware, support for Powerwall 2 and Powerwall+ is still listed as "coming soon," and the feature remains limited by specific vehicle and equipment configurations.
