Tesla has turned its two top sellers into backup batteries for the house.

Tesla Energy announced on Tuesday that Powershare Home Backup is now available for new Model 3 and Model Y vehicles paired with a Powerwall 3, saying the car can “extend your home backup by over 2 days.” Minutes later, Tesla’s main account quoted the post with a broader pitch: “With Powerwall 3, every Tesla can now serve as your home’s backup battery.”

Until this week, the Cybertruck was the only Tesla that could send power back into a home, and that capability only began working alongside Powerwall 3 last month, after years of ambitious targets.

Tesla’s updated Powershare page says every Model 3 and Model Y ordered in the U.S. or Puerto Rico on or after October 1, 2026 can use the feature. Some, but not all, earlier cars also qualify. Owners can check on the touchscreen under Software, then Additional Vehicle Information, where a capable car shows “Powershare Support: Enabled.” As Electrek reported, bidirectional power on the two cars runs through an inverter Tesla calls PCS2 Lite, and the company has not said when that part entered production on each trim.

The home side is simpler. A house that already has a Powerwall 3 and either a Wall Connector 3 or Universal Wall Connector needs no additional equipment, and Tesla says compatibility is enabled through a software update. When the grid drops, the Powerwall and the car work together, with up to 11.52 kW of continuous power available. Tesla’s “over two days” estimate assumes a home using 30 kWh per day and a car starting at a 90 percent charge. Standard trims are rated for up to two days, while the Cybertruck adds more than three.

There are limits. Powerwall 2 and Powerwall+ support is listed as “coming soon.” Model S and Model X are not included, and Grid Support, the program that lets Cybertruck owners in Texas send power back to the grid during demand spikes for bill credits, is not available for Model 3 or Model Y.

The rollout also lines up with something Elon Musk said more than three years ago. At Tesla’s March 2023 Investor Day, Musk said, “I don’t think very many people are going to want to use bidirectional charging, unless you have a Powerwall.” Tesla has now shipped the feature for its volume cars with exactly that requirement attached.

The Powerwall pairing was the hard part on Cybertruck. Tesla told owners in December 2025 that Powershare with Powerwall had been pushed to mid 2026, and lead engineer Wes Morrill explained that two devices capable of forming a home’s grid have to negotiate which one leads during an outage, across multiple generations of hardware. With that work done for the truck, Tesla was able to extend it to the Model 3 and Model Y within a month.

Ford and GM have offered home backup from their EVs for several years, but both require a separate inverter and backup hardware. Tesla’s version leans on equipment many Powerwall 3 owners already have on the wall. Powershare for the two cars also ships as part of software update 2026.38.3, the same release that began delivering Halloween Mode on Tuesday.

Tesla’s Cybertruck can now pair with a Powerwall 3 to keep a house running longer during an outage, a feature the company first promised when the truck launched in November 2023.

The official Cybertruck account posted the update on X Thursday: “Powerwall 3 & I can now power your house together. This extends your home backup by over 3 days, equivalent to 9 additional Powerwalls,” Cybertruck lead engineer Wes Morrill confirmed the rollout separately, calling it the first time a vehicle and a home battery have worked together this way. Powerwall 2 and Powerwall+ compatibility is still coming later this year, per both the Cybertruck account and Morrill.

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

Powershare itself is not new. Tesla enabled the version that lets Cybertruck power tools, appliances or another EV through its bed outlets when the truck launched in 2023. Home backup through a Powershare Gateway and Universal Wall Connector arrived in 2024, and Tesla extended that support to homes with solar the following year. What has been missing until now is Powershare working alongside an existing Powerwall, instead of functioning as a separate backup source competing for the same job.

The pairing matters because a single Powerwall home battery typically covers a home for about a day, less if usage is heavy or the outage stretches into a heat wave or freeze. A second Powerwall for more backup storage costs several thousand dollars installed. A Cybertruck instead uses a battery the owner already has, one large enough here to add roughly three more days of backup without mounting another unit or booking an installer visit. For households in wildfire, hurricane or winter storm regions where outages run past a day, that keeps the refrigerator and medical equipment running instead of shutting down.

Tesla provides Cybertruck Powershare release update

The company told owners in October 2024 that Powerwall integration was coming sometime in 2025. That date passed, and in December 2025 Tesla pushed the target to mid-2026, with Morrill explaining at the time that two grid-forming devices need to negotiate which one manages a home during an outage, and that certifying the process across multiple generations of Powerwall took longer than expected.

For owners who bought Powershare hardware expecting it to work with whatever battery setup they already had, Thursday’s update closes a gap that has shown up repeatedly in owner complaints since Cybertruck deliveries began. Tesla has also rolled out a separate Powershare grid support program in Texas, letting Cybertrucks send power back to the grid during high demand events, so the truck’s role in a home’s energy setup keeps expanding even as individual pieces of it arrive later than promised.

Tesla is mulling a potential plan to build a battery storage production plant alongside its potential electric vehicle production facility in India, according to a new report.

Tesla has been attempting to come to terms with the Indian government on an electric vehicle production plant for several years, but the talks have gotten more intense over the past few months as the automaker wants to build a factory that would produce a $24,000 car.

CEO Elon Musk has said this year that Tesla will hopefully come to terms with the Indian government this year, with the big bottleneck being the two parties not able to agree on terms regarding import duties that would allow the company to test demand by sending cars from other countries.

These duties price out many customers as, in some cases, they can double the price of a car. However, there has been more movement in the direction of an agreement in terms of this year, and it may not involve importing.

Now, Reuters is reporting that Tesla is planning to take it a step further by building energy storage products in India. Tesla is proposing that it could support India’s battery storage capabilities with the Powerwall, which stores excess energy generated from solar panels.

Tesla and India may not come to terms on import duties, but the plan to bring a wider business model to the country may be the bridge that is needed to make a deal.

One source said that the government wants to help create a fair business model for Tesla as it could offer subsidies for those who purchase energy storage products.

Tesla and the Indian government are still reviewing the proposal, and they are reportedly “keen” on the idea. However, it is still under review.

The source also said:

“Large policy level calibration will be required. Tesla’s intent is to have the Powerwall business in India.”

Tesla could be India’s answer to peak-time shortages and demand surges as the country has boosted supply to towns and villages. India is dependent on coal-based power generation, and its 1.4 billion people depend on non-renewable sources for nearly 58 percent of its energy needs. Non-fossil fuels make up the remaining percentage, with Solar being the biggest contributor, according to the country’s Ministry of Power.

Powerwall would help residents avoid outage issues, and Prime Minister Narendra Modi was extremely interested in how it could help farmers when he met with Tesla brass in 2015.

“Enjoyed discussion on how battery technology can help farmers,” he said. Musk also said he had a productive talk with Modi about solar and how batteries and storage systems can empower rural communities.

“The Prime Minister was very keen to see how we could utilize the battery power ball concept to leapfrog development in India,” Vikas Swarup, Spokesman of the Ministry of External Affairs, said in 2015.

Tesla just recently launched a new version of the Powerwall as well, which offers new and improved specifications that will help keep the lights on longer and avoid outages.

Tesla Powerwall 3 specs officially listed on company website

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