Verify Model 3 and Model Y Powershare Home Backup Compatibility

Powershare Home Backup lets Model 3 and Model Y provide electricity to your home during an outage. Support depends on newly integrated bidirectional charging hardware, so eligibility varies by build date. You can confirm compatibility in seconds using the vehicle touchscreen.

How to Check for Powershare Support

In the U.S., all new Model 3 and Model Y orders placed on or after October 1, 2026, support Vehicle-to-Home (V2H) output. Some vehicles built shortly before that date may also include the necessary hardware. To verify on your car:

Go to Settings > Software on your vehicle’s touchscreen.
Select Additional Vehicle Info.
Look for Powershare Support: Enabled.

If this entry appears, your vehicle has the required hardware. If it does not, a software update will not add the capability because it relies on power electronics built into the car. Tesla has not announced official retrofits for vehicles without the necessary hardware.

What Powershare Home Backup Does

During an outage, a compatible Model 3 or Model Y connected to a Wall Connector can power your home alongside Powerwall. It can deliver up to 11.52 kW of continuous power, matching Cybertruck and far exceeding the 2.4 kW limit of Vehicle-to-Load (V2L). You can also set a limit for how much of the vehicle’s battery Powershare may use.

You’ll need a Powerwall 3 plus a Wall Connector or Universal Wall Connector, but no separate Powershare Gateway. Support for Powerwall 2 and Powerwall+ is coming soon. Cybertruck owners already have full-home backup with Powerwall, and Cybertruck remains the only Tesla that can operate without a Powerwall by using a separately installed Powershare Gateway.

Estimated Backup Contribution by Vehicle

Here’s how much backup each vehicle can add:

Model and Trim	Backup Duration	Approx. Usable Battery Capacity
Cybertruck (All Trims)	Over three days	123 kWh
Model 3 Premium/Performance, Model Y Premium/Performance	Over two days	75 to 85 kWh
Model 3 Standard, Model Y Standard	Up to two days	About 70 kWh

Tesla’s estimates assume an average U.S. home using 30 kWh per day and a vehicle charged to 90%, so real-world results will vary. For reference, Powerwall 3 stores 13.5 kWh, so a Model 3 or Model Y holds roughly five to six times as much energy.

Outside the U.S., Tesla recently added V2L to all Model 3 and Model Y vehicles built at Giga Shanghai, so those cars could be next in line for full home backup support.