TSLASunday, 20 Sep 2026
FSD v14.3.10 unifies the model, V2H with Powerwall launches, and 8-hour long-duration storage joins Australia's grid
Tesla has merged three stacks (Smart Summon, consumer FSD and Robotaxi) into a single neural network. The two software tracks are starting to converge, paving the way for unsupervised capability to reach production cars. The same release debuts Vehicle-to-Home with Powerwall, which brings the car's battery into the home energy system.
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In Australia, RWE's Limondale project has used 144 Megapacks to connect the first 8-hour long-duration storage to the grid, a concrete win for the high-margin storage business.
Key evidence
- FSD v14.3.10 (2026.27.10) rolled out on 19 Sep. Tesla's own wording: 'Unified the model between Actually Smart Summon, FSD, and Robotaxi'. It is the first time the three stacks share one model.
- Upgraded reinforcement learning training stage, wider coverage for ACE automatic collision avoidance, and Smart Summon top speed raised to 8 mph
- Until now the two tracks diverged: the Robotaxi fleet ran a full major version ahead, while consumer cars would not get the new version until late 2026 or early 2027 (a point made repeatedly on 21 Aug and 1 Sep). From today the gap starts to close.
- Vehicle-to-Home with Powerwall debuts. Bidirectional charging extends from Cybertruck Powershare to selected Model Y configurations and links up with Powerwall home storage, bringing the car's battery into the home energy system.
- RWE's Limondale project (Balranald, New South Wales) is 50MW/400MWh, built from 144 Megapacks, and can discharge continuously for 8 hours. It is the first large-scale 8-hour long-duration storage on Australia's grid (most systems today last only 2 to 4 hours).
- Storage is the company's highest-margin business: 20.4% gross margin in Q2 versus 16.3% for autos
- Limondale is designed to charge at about 100MW and discharge at 50MW. It fills up on surplus solar at midday and releases slowly into the evening peak, a direct fix for solar's duck curve.
Catalysts to watch
- With a unified model, Tesla is deliberately narrowing the capability gap between consumer cars and Robotaxi, paving the way for unsupervised capability in production cars
- V2H ties in Powerwall sales, another notch in vertical integration from car to energy ecosystem
- Megapack has established its position in the high-value long-duration storage niche, and storage is one of the few cash-flow engines improving earnings quality
Risks
- Consumer FSD is still supervised L2 with the driver responsible. A merged model does not make consumer cars unsupervised.
- This is a single release. Real capability gains need to be proven over real-world miles, and it is not a valuation-level turning point.
- V2H is only a software unlock and needs a dedicated adapter or hardware, so its reach is limited. It is an incremental product feature, not a payoff.
- Limondale is a single project of modest size (144 units): incrementally positive on supply and delivery, not a valuation-level catalyst
Sources (2)
- Tesla FSD v14.3.10 (2026.27.10) release notes, 19 Sep
- The Electric Viking, 19 Sep: RWE Limondale Megapack storage
A brief is a lead for our research, not a verified conclusion or advice.