We’ve now uncovered more details on how Tesla achieved such drastic improvements in the vehicle’s power consumption, which Tesla estimated to be a 40% reduction.
Tesla made architectural changes to how it processes and analyzes video — optimizing which components handle which tasks. While the Cybertruck is the first to benefit from these advancements, Tesla plans to extend these upgrades to other vehicles in the future.
Sentry Mode Power Consumption
Tesla vehicles feature two main computers: the MCU (Media Control Unit) computer, which powers the vehicle’s infotainment center, and the FSD computer, which is responsible for Autopilot and FSD. Both of these computers remain on and powered any time the vehicle is awake, consuming about 250-300 watts.
Typically, the vehicle only uses this power while it’s awake or actively driving. It’s not a major concern since the car automatically goes to sleep and shuts down its computers after about 15 minutes of inactivity. However, the larger issue is that these computers also need to remain on when Sentry Mode is active, causing a 250-watt draw whenever Sentry Mode is on.
Interconnected System
Today, the vehicle’s cameras are connected to the FSD computer, which connects to the MCU, which is finally connected to the USB ports. Because of this interconnected setup, everything needs to remain powered. Footage needs to be streamed from the FSD computer into the MCU, where processes like motion detection occur. The data then needs to be compressed before finally being written to the USB drive. That’s a lengthy process, requiring multiple computers to remain on in order to be able to record and save live video.
Architectural Changes
Tesla is making some architectural changes to address Sentry Mode’s high power consumption by shifting the responsibilities of the vehicle’s computers. By shifting motion detection and possibly the compression activity to the FSD computer, Tesla will now be able to keep the MCU computer asleep. The MCU is still required to push the video to the USB drive, but Tesla can now wake up the system only when it’s needed.
For instance, the FSD computer will still handle the connection to the vehicle’s cameras, but it will now also detect motion. When that Sentry event occurs, it can wake up the MCU to write the data to the USB drive and then have it go back to sleep.
This approach ensures the MCU isn’t continuously powered to analyze and compress video, instead activating it only when data needs to be written.
Processor Isolation & Task Allocation
Tesla’s current architecture separates the Autopilot Unit (APU) from the MCU. This is done for several reasons - but first and foremost is safety. The MCU can be independently restarted even mid-drive without impacting the APU and key safety features.
Additionally, by isolating the APU from the MCU, tasks that are optimized for each unit—processing versus image transcoding—can be offloaded to the processing unit that’s better suited for it. This helps keep both the APU and MCU operating at their optimal power and performance parameters, helping to manage energy consumption more efficiently.
Kernel-Level Power Management
Tesla’s been working on more than just FSD or new vehicle visualization changes and has been putting in the effort to optimize the operating system’s underlying kernel. While not in heavy use, Tesla is underclocking the processors of both the MCU and APU, reducing power usage and heat generation.
Of course, other kernel optimizations and programming tricks, such as the ones Tesla uses to optimize its FSD models, also factor into the increased overall efficiency of the vehicles.
Additional Benefits
Since Tesla vehicles also include a Dashcam that processes video, it’s possible we may also see these additional power savings whenever the vehicle is awake. This could also affect other features, such as Tesla’s Summon Standby feature, which keeps the vehicle awake and processing video to give users almost instant access to the vehicle’s Summon feature.
Roll Out to Other Vehicles
While the Cybertruck was the only vehicle to receive these power improvements to Sentry Mode, we were told that they’re coming to other vehicles too. Tesla is introducing these changes with the Cybertruck first, leveraging its smaller user base for initial testing before expanding the rollout to other vehicles.
USB Port Power Management
To further conserve energy and reduce waste, Tesla now powers down USB ports, even if Sentry Mode is active. This change has impacted many users who rely on 12v sockets or USB ports to remain powered to keep accessories such as small vehicle refrigerators on.
It’s not immediately clear whether these changes to Sentry Mode impact this change or whether power to 12v outlets was removed strictly due to safety concerns.
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With the launch of Tesla’s Robotaxi service, Tesla also introduced the new Robotaxi app. The app is currently only available to influencers who have access to the service, but it’s expected to roll out to everyone once the service is available to the general public.
Let’s have a look at all the features available in the current version of the app.
Sign In
From the moment you open the Tesla app, you’re greeted with a photo of the Model Y robotaxi. Although Tesla is using Model Ys in a variety of colors, the app theme uses the gold Cybercab color.
Similar to the Tesla app, you can sign in with your Tesla account or create a new account. Once you sign in, Tesla will automatically pull data from your Tesla account, including your profile photo and payment information.
This ends up being a really nice experience, similar to Supercharging. Whenever you reach your destination, there’s nothing to pay or do except to grab your belongings and exit the vehicle.
Search and Select Destination
Rob Maurer
Once you’re logged in, you get a map of your current location. You can see your current location on the map and the Robotaxi geofence.
Underneath, you have a search box to add a destination or filter for nearby places such as food and shopping. Tesla also includes your previously searched for destinations below that.
Before you even type anything in, Tesla lets you know the wait time for a Robotaxi at your location. Tesla also currently displays the fee even before you select a destination, as it’s currently a flat fee of $4.20. However, in the future, this will likely be displayed after you choose your destination.
Waiting For Your Ride
Sawyer Merritt / DirtyTesla
Once you’ve chosen a pickup location and destination, Tesla will show you the status of your taxi. You can track it in real-time on a map, and it’ll display a visualization of the vehicle and its ETA at your pickup location. It’ll also provide an estimate of when you’ll reach your destination.
A nice touch is that the app displays your vehicle’s color in the visualization and license plate, making it easier to find the vehicle when it arrives.
While you’re waiting, you can cancel the pickup or report an issue.
When Your Vehicle Arrives
@BLKMDL3
When your Robotaxi finally arrives, you’ll have access to some of the vehicle's controls, such as sounding the horn, flashing its lights, locking and unlocking it, and opening the trunk.
Widget
Tesla is also providing a Live Activity while you’re waiting for your ride, so that you can continue to track the vehicle even if you’re not in the Robotaxi app.
@DirtyTesla
Joe Tegtmeyer on X
Robotaxi Tips
@DirtyTesLa on X
The exterior lights pulse prompt in the app.
@DirtyTesLa on X
Tesla provides several tips in the app while you’re waiting for your vehicle. It’ll show you how to use the Model Y's handles, in case you’re not familiar with them. It’ll also remind you that the vehicle’s lights will pulse when it arrives at your pickup location, helping differentiate it from other Teslas on the road.
You can swipe left and right for additional tips.
Menu
Sawyer Merritt
Similar to the Tesla app, the Robotaxi app features a menu with similar options. It includes options we’re already familiar with, such as Security & Privacy and Payment. New to the Robotaxi app are Data Sharing, Ride History, Support, and Appearance.
Ride History: The Ride History section shows you all of your previous rides. It’ll display all of your rides broken down by date and destination. It’ll also include the fee and the time you were picked up.
If you tap into any ride, you’ll be able to see the route the Robotaxi took for that ride, as well as your pickup time, arrival at destination, distance, and fee.
On this screen, you can also report a lost item, but we have yet to see what that looks like.
Appearance: Unlike the Tesla app, which uses a dark theme throughout the app, the Robotaxi app lets you switch between light and dark modes. Unlike other apps, there isn’t an option for Auto to have it reflect what you’re using in the OS.
Sawyer Merritt
Data Sharing: The Data Sharing section includes an option to turn off device location, although Tesla requires it to be enabled to book a ride. Your location is tracked through the app even when the app isn’t running in the foreground. While Tesla said that cabin camera and microphone use would only be used when a rider agrees, they are requiring these optiosn to be turned on to actively details during the early-access period.
Support: Support currently has options to report a lost item or report a found item. While you can reach out to Tesla Robotaxi support in the vehicle, it doesn’t look like you can do it after the ride has completed.
Sawyer Merritt
Adjust Vehicle Settings
If you open the app while you’re in an active ride, you’ll be able to adjust various vehicle settings. This includes the cabin temperature, music controls, and volume.
Sawyer Merritt
Call Support or Pull Over
Similar to the controls on the rear screen of the vehicle, you can also call support or have the vehicle pull over directly from the Robotaxi app. While the safety monitor has additional controls, such as Stop in Lane, users are limited to these two buttons.
Tipping
Sawyer Merritt / DirtyTesla
At the end of your ride, you’ll need to tap Finish Ride and Tesla shows you how to exit the vehicle. You’ll also be able to open the trunk or reach out to Tesla support.
You’ll be given a chance to rate your ride and even tip the driv— car. However, Tesla has a little easter egg for anyone looking to tip, which can be seen in the video below:
The Robotaxi app is currently being offered to 20 influencers who were invited to the event through a special link. Unfortunately, it’s not yet available in the App Store. While influencers could bring one guest with them, only the invitee could download and use the Robotaxi app.
The app is currently only available for Apple devices, but it’s expected to have an Android counterpart when, or shortly after, it launches to the public.
The Robotaxi can now clean its primary pair of forward-facing cameras on the fly. This new feature was initially hinted at in the FSD V13 release notes as the “improved camera cleaning” feature, but the way it’s implemented is quite clever.
It uses a unique wiper and spray sequence that directs washer fluid squarely onto the portion of the windshield where the camera enclosure is. This effectively keeps the two most important cameras on board the Model Y clean - the ones responsible for the entire forward arc of vision. All of this is done to ensure that the vehicle’s vision remains unobstructed by dirt, bugs, or road grime during a trip.
Since the cameras are right up against the glass, the windshield portion that the cameras need to be cleaned is extremely small, just about 6 inches by 4 inches. The sequence focuses on spraying and wiping this area, repeatedly, which technically is all it needs cleaned. The rest of the windshield is just for the passengers’ benefit.
While older HW3 vehicles include three front-facing cameras, HW4 cars only utilize two. One wide-angle lens to have a wider view, and another camera that focuses on the road ahead. Due to the higher resolution of HW4, the primary camera is used for shorter and farther distances.
The small area outlined in yellow is all the vehicle needs to see properly out of its front-facing cameras.
Not a Tesla App
What About the Sides and Rear?
While the forward-facing cameras are covered, including the currently unused-for-FSD bumper camera, that leaves the majority of the other cameras exposed to the elements and unable to be easily cleaned. The side repeater cameras on the fenders, as well as the B-pillar cameras, are crucial for cross-traffic and side visibility, while the rearview camera provides rearward visibility.
While the front camera is the most important, Tesla recently explained that the updated door design on the new Model 3 and Model Y includes an extended indent for the fender cameras to create a little vortex that helps remove water from the repeater cameras. While this is helpful, it may not keep the cameras completely clear.
For a true autonomous system in varying weather conditions, keeping all cameras clean is important. A dirty repeater camera could prevent a safe lane change, and an obscured rearview camera makes autonomous parking or reversing maneuvers difficult, if not impossible.
The question is - how does Tesla plan to address these?
The Cleaning Bot
The answer likely lies outside the vehicle. Just as with human-operated vehicles, a third party will be responsible for maintaining the cleanliness of these cameras. Tesla has previously demonstrated its Robotaxi cleaning robot in action on the interiors of the Cybercab, but the same robot, equipped with a multi-function manipulator arm, can likely also wash the exterior cameras.
This hub-based robot is probably the other half of Tesla’s future cleaning strategy. When a Robotaxi returns to the hub for charging, the robot could perform a full exterior sensor sweep, precisely cleaning the side, pillar, and rear camera lenses.
That’s a fairly comprehensive cleaning solution — clear the front-facing cameras on the go as they get dirty, and send the vehicle back for a more thorough cleaning if any others are obstructed.
What About Today?
Of course, as Tesla is still in the pilot stages now, that cleaning robot likely isn’t in that equation quite yet. Humans are still plugging in the Model Y Robotaxis at the end of the day to charge, and likely cleaning them as well, for the duration of the pilot stage.
As Tesla scales its fleet, these autonomous cleaning methods will become necessary, and we’ll eventually learn more about how they intend to address this in the future.
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