Tesla's Model 3 and Model Y Can Feed 11.52 kW to a Home, but Only With a Powerwall 3 and a New Order
Hardware / explainer
Tesla's Model 3 and Model Y Can Feed 11.52 kW to a Home, but Only With a Powerwall 3 and a New Order
Powershare Home Backup reaches Tesla's two best sellers on Oct. 6, with a 4.8-fold jump over their old 2.4 kW output and fine print on eligibility.
Tesla began offering Powershare Home Backup on Oct. 6 for the Model 3 and Model Y, letting the cars push 11.52 kW into a house during an outage, but only alongside a Powerwall 3 and only guaranteed on cars ordered from Oct. 1.
Electrek and Not a Tesla App both report the same conditions. Tesla's own pitch, quoted by Solar Power World, came from Colby Hastings, the company's Senior Director of Residential Energy: "With Powershare Home Backup, choosing a Tesla is no longer just a decision to buy an EV. It's a decision to invest in home energy resilience."
What the 11.52 kW figure replaces
Not a Tesla App gives the output as "11.52 kW continuous at 240V AC", against a 2.4 kW ceiling on the vehicle-to-load mode these cars offered before. That is a factor of 4.8, and it is the difference between running a laptop and a freezer and running a house with an electric range or a heat pump.
The Cybertruck already did this. Electrek notes that Model S and Model X are left out of the launch, and that Powerwall 2 and Powerwall+ support is listed as "coming soon" with no date.
The number that matters is stored energy, not kilowatts
Output decides what can run at once. Stored energy decides how long it runs. Tesla's estimate, per Solar Power World, assumes a home using about 30 kWh a day: two additional days from a Model 3 or Model Y, three from a Cybertruck. Electrek reports the Model 3 and Model Y figure as "over two days" from a 90% charge, and "up to two days" on standard trims.
Not a Tesla App puts usable capacity at roughly 75 to 85 kWh on Premium and Performance trims and about 70 kWh on Standard. A Powerwall 3 holds 13.5 kWh, so at 30 kWh a day it covers about 11 hours alone. The car is five to six times larger, which is the figure Not a Tesla App draws and which the arithmetic bears out (70 divided by 13.5 is 5.2).
- Model 3/Y, earlier V2L mode2.4 kW
- Ford F-150 Lightning home backup (2022)9.6 kW
- Model 3/Y, Powershare Home Backup11.52 kW
Source: Not a Tesla App (V2L and Powershare Home Backup figures) and Electrek (F-150 Lightning figure), accessed 2026-10-06
| Source of backup | Stored energy | Tesla's backup estimate (30 kWh a day) |
|---|---|---|
| Powerwall 3 | 13.5 kWh | about 11 hours (arithmetic, not Tesla's figure) |
| Model 3/Y Standard | about 70 kWh | up to two days |
| Model 3/Y Premium or Performance | about 75 to 85 kWh | over two days |
| Cybertruck | not stated in sources | more than three days |
Where Ford and GM stand
Electrek says Ford launched home backup on the F-150 Lightning in 2022 at 9.6 kW, so Tesla's 11.52 kW is 20% higher on paper. The same report says GM committed to vehicle-to-home across its Ultium-based EVs by 2026, naming the Equinox EV, Blazer EV, Silverado EV, the 2027 Bolt and several Cadillacs, and that Kia offers it on the EV9 through Wallbox chargers. These are Electrek's summaries; the article does not give GM's output figures. Elsewhere in EVs, Lucid built 2,954 cars in Q3 and sold 3,806, drawing down its inventory.
Tesla's fine print is tighter than the headline. Powershare Home Backup requires a Powerwall 3 and a Wall Connector or Universal Wall Connector. Solar Power World adds that existing installations may need an installer to confirm the Wall Connector sits on the backup circuit and meets local code. Electrek says owners with a qualifying setup must contact Tesla support to have it enabled, and that Grid Support, meaning selling power back to the utility, is not available. The launch covers the US and Puerto Rico.
What is unconfirmed
Sources disagree on older cars. Solar Power World lists purchase after Oct. 1, 2026 as a requirement. Electrek says some earlier Model 3 and Model Y units may be capable but are not guaranteed. Owners can check under Software, then Additional Vehicle Info, for a "Powershare Support: Enabled" line, according to Not a Tesla App.
What would change this read is a Tesla date for Powerwall 2 and Powerwall+ support, which would widen the pool of homes that qualify beyond Powerwall 3 owners. Battery supply is a separate constraint on the whole category; Amprius's $75 million drone-battery grant has only $22 million funded. Until then, the number to watch is how many cars ordered before Oct. 1 report "Enabled".
Sources
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