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The Tesla Semi’s 500 kWh battery and Convoy Mode are grossly underestimated
The Tesla Semi may be delayed for quite some time now, but it appears that Elon Musk’s all-electric Class 8 truck will be well worth the wait. And as the upcoming truck gets closer to mass production, it is becoming more and more evident that the Semi’s potential—particularly with regards to its batteries and FSD features—remains grossly underestimated.
During a recent appearance at the Joe Rogan Experience podcast, Elon Musk revealed that the Semi would be equipped with a 500 kWh battery pack. The Tesla CEO did not specify which variant of the Semi will be fitted with a 500 kWh pack, though speculations from the electric vehicle community suggest that the battery would be for the truck’s 300-mile variant. However, even if this were the case, such an update provides a glimpse at just how far Tesla has come when it comes to its battery technology.
“You want something in the order of probably a 500 kWh pack. What we have in the Model S and X is a 100 kWh pack and probably something like a 500 kWh pack in the Tesla Semi,” Musk said.
When the Semi was unveiled in late 2017, Tesla noted that the vehicle would consume less than 2 kWh per mile. Considering that the Tesla Semi’s two variants are listed with 300 and 500 miles of range, estimates pointed to the vehicle having a battery pack that’s likely around 600 kWh to 1,000 kWh. Musk’s recent update suggests that Tesla has improved its batteries to such a degree that the Semi now needs a smaller battery pack to accomplish its 300-mile range target. This may seem like a minor change, but a smaller battery pack presents numerous advantages, such as lower weight and significant production cost savings. These all contribute to make the 300-mile Tesla Semi a viable and competitive vehicle, especially considering its estimated $150,000 base price.
Of course, these advantages only become more prominent if one considers the benefits of Tesla’s structural 4680 battery packs. With structural batteries in place, the Semi could save weight and production costs even further. A structural battery could also make the Semi more rigid, allowing it to be even safer than its initial iterations. This goes hand in hand with another update on the vehicle that was mentioned by Tesla, and one that is also widely ignored or at most underestimated today.
During Tesla’s Q4 FY 2020 earnings call, Elon Musk confirmed that the Semi might very well be the first vehicle in the company’s lineup that would receive full autonomy features. This was a point highlighted by both Elon Musk and Automotive President Jerome Guillen, who noted that the FSD hardware on the Semi would be the same one used in Tesla’s other vehicles. Musk, for his part, pointed out that the Semi’s FSD features will require Tesla to modify the FSD software’s parameters according to the Semi’s large size.
Perhaps one thing that is rarely mentioned is that when the Semi was unveiled in 2017, Elon Musk remarked that the vehicle was already capable of utilizing a feature called “Convoy Mode,” which optimizes efficiency while allowing several uncrewed trucks to follow a lead, crewed vehicle. If Musk’s statements were accurate and Convoy Mode was already feasible with Enhanced Autopilot’s capabilities in late 2017, then such a function would likely be extremely plausible today with the Full Self-Driving Beta. This should make the Semi safer to use than traditional long-haulers, most of whom are still manually driven. Couple this with the Semi’s functions like its four electric motors, which help prevent incidents like jackknifing, and the upcoming all-electric Class 8 truck has a shot at becoming one of the safest large vehicles on the road today.
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Tesla begins Holiday Update rollout with some surprise features
On Monday, just a few days after Tesla first announced the Holiday Update, people started reporting that it was being deployed to owners.
Tesla has started the rollout of the 2025 Holiday Update, as several owners reported it had arrived in their cars via a software update.
Tesla’s Holiday Update is rolling out as Software Version 2025.44.25.1, and includes several new features. We did an extensive breakdown of what was included in another article, but we’ll list the new additions below:
- Grok with Navigation Commands (Beta) – Grok will now add and edit destinations.
- Tesla Photobooth – Take pictures inside your car using the cabin-facing camera
- Dog Mode Live Activity – Check on your four-legged friend on your phone through periodic snapshots taken of the cabin
- Dashcam Viewer Update – Includes new metrics, like steering wheel angle, speed, and more
- Santa Mode – New graphics, trees, and a lock chime
- Light Show Update – Addition of Jingle Rush light show
- Custom Wraps and License Plates – Colorizer now allows you to customize your vehicle even further, with custom patterns, license plates, and tint
- Navigation Improvements – Easier layout and setup
- Supercharger Site Map – Starting at 18 pilot locations, a 3D view of the Supercharger you’re visiting will be available
- Automatic Carpool Lane Routing – Navigation will utilize carpool lanes if enabled
- Phone Left Behind Chime – Your car will now tell you if you left a phone inside
- Charge Limit Per Location – Set a charge limit for each location
- ISS Docking Simulator – New game
- Additional Improvements – Turn off wireless charging pad, Spotify improvements, Rainbow Rave Cave, Lock Sound TRON addition
On Monday, just a few days after Tesla first announced the Holiday Update, people started reporting that it was being deployed to owners.
We noticed a new Tesla software update 2025.44.25.1 on a Model Y AWD LR (2022) in Florida, United States. View the rollout of this update here: https://t.co/rPqISQaNkM
— Teslascope (@teslascope) December 8, 2025
It seems the release is a bit of an apology to a particular group, as it has only made its way to Hardware 3 vehicles, particularly the ones using the AMD Ryzen chip.
Tesla has excluded FSD-purchased and subscribed vehicles that are utilizing Hardware 3, so it seems there is a strategy to this limited rollout.
Two Surprise Additions
Tesla has added two additional features with the Holiday Update, which include a new Storage Space for Dashcam feature that shows how much space you have used and remaining on your USB drive.
Additionally, Tesla gamified Supercharging with a new “Charging Passport” feature, which we reported on earlier today.
News
Tesla announces major milestone at Gigafactory Shanghai
First deliveries started in December 2019, with the first units being given to employees. By the end of 2020, the plant was building cars at a run rate of around 150,000 vehicles annually.
Tesla has announced a major milestone at its Chinese manufacturing facility, Gigafactory Shanghai, confirming on Monday that it had built its four millionth vehicle.
Tesla Gigafactory Shanghai first started building cars back in October 2019 with Model 3 assembly, just ten months after the company broke ground on the plant’s 86-hectare piece of land.
First deliveries started in December 2019, with the first units being given to employees. By the end of 2020, the plant was building cars at a run rate of around 150,000 vehicles annually. Production continued to ramp up, and by September 2023, less than three years after it started building Tesla’s EVs, it had built its two millionth vehicle.
Fast forward to December 2025, and Tesla has confirmed that four million cars have rolled off of production lines at the plant, a major milestone in the six short years it has been active:
Produced our 4 millionth vehicle at Gigafactory Shanghai🎉
Thanks to all our owners and supporters❤️ pic.twitter.com/DayVXUr220— Tesla Asia (@Tesla_Asia) December 8, 2025
The capacity at Giga Shanghai is exceeding 950,000 vehicles per year, and this year, the company has delivered 675,000 cars through the first three quarters. It is also the only plant to manufacture the Model Y L, a longer wheel-based configuration of the all-electric crossover that is exclusive to the Chinese market.
Gigafactory Shanghai’s four million cars have not all stayed within the domestic market, either. For a considerable period, the factory was exporting a significant portion of its monthly production to Europe, helping Gigafactory Berlin supplement some Model Y volume and all of its Model 3 deliveries. This is due to the Berlin plant’s exclusive production plans for the Model 3.
The site is one of the most crucial in the company’s global plans, and Gigafactory Shanghai’s incredible pace, which has led to four million production units in just about six years. It’s fair to say that it won’t be long until we’re seeing Tesla celebrate the plant’s five millionth vehicle produced, which should happen sometime late next year or in early 2027, based on its current manufacturing pace.
The company also builds the Megapack on the property in an adjacent Megafactory.
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Tesla gamifies Supercharging with new ‘Charging Passport’
It will also include things like badges for special charging spots, among other metrics that will show all of the different places people have traveled to plug in for range.
Tesla is gamifying its Supercharging experience by offering a new “Charging Passport,” hoping to add a new layer to the ownership experience.
While it is not part of the Holiday Update, it is rolling out around the same time and offers a handful of cool new features.
Tesla’s Charging Passport will be available within the smartphone app and will give a yearly summary of your charging experience, helping encapsulate your travel for that year.
It will also include things like badges for special charging spots, among other metrics that will show all of the different places people have traveled to plug in for range.
Tesla has just introduced “Charging Passport,” a new yearly summary of your charging.
• Charging badges: Iconic Charging badge (for visiting places like the Tesla Diner, Oasis Supercharger, etc), Explorer badge, green saver badge, etc.
• Total unique Superchargers visited
•… pic.twitter.com/c1DHTWXpj7— Sawyer Merritt (@SawyerMerritt) December 8, 2025
Tesla will include the following metrics within the new Charging Passport option within the Tesla app:
- Charging badges: Iconic charging badges for visiting places like the Tesla Diner, Oasis Supercharger, etc., Explorer Badge, and more
- Total Unique Superchargers Visited
- Total Charging Sessions
- Total Miles Added during Charging Sessions
- Top Charging Day
- Longest Trip
- Favorite Charging Locations
This will give people a unique way to see their travels throughout the year, and although it is not necessarily something that is needed or adds any genuine value, it is something that many owners will like to look back on. After all, things like Spotify Wrapped and Apple Music Replay have been a great way for people to see what music they listened to throughout the year.
This is essentially Tesla’s version of that.
With a handful of unique Superchargers already active, Tesla is also building some new ones, like a UFO-inspired location in New Mexico, near Roswell.
Tesla is building a new UFO-inspired Supercharger in the heart of Alien country
Tesla begins Holiday Update rollout with some surprise features
Tesla announces major milestone at Gigafactory Shanghai
