Tesla turned on Powershare Home Backup for the Model 3 and Model Y on 6 October 2026. Its two volume cars can now hold up a house through an outage — something only the Cybertruck could do until today, and only since Tesla got it working alongside a Powerwall 3 last month.
Tesla Energy put it this way: "Powershare Home Backup is now available for new Model 3 & Model Y with Powerwall 3. Extend your home backup by over 2 days with your vehicle."
The first word is doing most of the work.
"New" is a hardware gate, not a marketing one
Every Model 3 and Model Y ordered in the United States and Puerto Rico on or after 1 October 2026 ships with the hardware to send power back into a house. Cars ordered before that date are a lottery: Tesla says some but not all of them have it, and the deciding component is the PCS2 Lite inverter. Owners are told to check the car's touchscreen rather than infer it from the order date.
That detail travels further than the launch does. The PCS2 inverter family is the same one at the centre of Tesla's 344-step European retrofit procedure for 2.4 kW vehicle-to-load.
What it takes, and what it gives
| Requirement | Detail |
|---|---|
| Battery | Powerwall 3; Powerwall 2 and Powerwall+ listed as coming soon |
| Charger | Wall Connector or Universal Wall Connector |
| Extra hardware | None, if both are already installed |
| Activation | Contact Tesla support |
| Markets | United States and Puerto Rico |
Tesla quotes over two days of added backup from a Model 3 or Model Y, measured from a 90% charge against a house using 30 kWh a day. Standard trims are rated up to two days. Maximum continuous output is 11.52 kW, which is the Powerwall's figure and does not rise when the car joins in.
Three limits are worth stating plainly. There is no Grid Support, so the car cannot sell power back. Model S and Model X are excluded. And the Powershare Gateway route open to Cybertruck owners is not offered here — for the Model 3 and Model Y, the Powerwall's own gateway does the grid isolation, which is also why no new hardware is needed.
Europe is not on the list
Powershare Home Backup is United States and Puerto Rico only. Tesla's Canadian site still describes Powershare as a Cybertruck feature.
For a European owner, nothing has changed. Exporting power from a Tesla here still means the Model Y Premium outlet adapter at 2.4 kW, or the retrofit above — a socket, not whole-home backup. The rulebook is ahead of the product: the ISO 15118-20 amendment that makes AC vehicle-to-grid workable landed in July, and Germany has been rewriting its metering rules around it since.
What to watch
The useful signal is not the American launch date. It is that Tesla has now shipped vehicle-to-home on a mass-market platform — one of the two cars it builds in Berlin — and that eligibility turns on an inverter rather than on a model year.
Tesla has been moving these parts around market by market: it put vehicle-to-load on 2027 Shanghai-built Model 3s while leaving the US without it, and has now done the reverse with home backup. Europe has the regulations and, in the PCS2 cars, increasingly the hardware. What it does not have is the software switch.