A growing number of Tesla owners are turning their electric vehicles into emergency power sources for their houses. In 2024, the company’s software update allows the Model 3 and Model Y to supply electricity to a home’s critical circuits when the grid goes down.
The feature, released last month, lets drivers connect the car’s battery to a home inverter via a special adapter. Once activated, the vehicle can feed up to 5 kW of power to a selected circuit, keeping refrigerators, lights, and medical devices running for several hours. The system is controlled through the Tesla app, which displays real‑time battery status and estimated outage duration.
Tesla’s new „Vehicle‑to‑Home” (V2H) capability builds on the existing „Vehicle‑to‑Grid” (V2G) technology that was first tested in 2022. The adapter plugs into the car’s charging port and connects to a home inverter that feeds a dedicated circuit. When the grid fails, the car’s battery automatically powers the inverter. The system is designed to avoid draining the vehicle’s range below a safe threshold, so drivers can still travel once the outage ends.
According to Tesla, the V2H feature is available to all Model 3 and Model Y owners with a 2022‑model year or newer. The update is free and can be installed via a software download. Tesla’s engineering team estimates that the average battery can supply a household for 6–8 hours, depending on the load and battery health.
In late July, a San Diego family used their Model Y to keep their home powered during a wildfire‑induced power cut. „We had no idea the car could do that,” said the owner, who chose to keep the lights on in the kitchen and the refrigerator running. „The app told us we had about 7 hours left, which was enough to get through the night.”
Utility companies in California are monitoring the rollout. The state’s power grid is already strained by frequent outages, and the V2H option offers a low‑cost, immediate backup solution. Experts say that widespread adoption could reduce the strain on emergency generators and lower the overall cost of backup power for homeowners.
The ability to double as a home battery could attract new buyers to Tesla’s lineup, especially in regions prone to outages. Analysts predict that the V2H feature could boost sales of the Model 3 and Model Y by up to 5 % in the next year. Moreover, the technology may pave the way for future partnerships with utility companies, allowing EVs to feed power back into the grid during peak demand.
Can I use my Tesla to power my entire house? The current V2H setup supports up to 5 kW, which is enough for essential circuits but not for all appliances.
Will the car’s range be affected? The system limits discharge to keep the battery above a 20 % threshold, preserving most of the vehicle’s driving range.
Is the adapter sold separately? Yes, Tesla offers a dedicated adapter for V2H that can be purchased through the company’s online store.