The genesis of the Cybertruck's fun in the water can be traced back to Elon Musk's fascination with a piece of cinematic history. Musk purchased the Lotus Esprit from the James Bond film "The Spy Who Loved Me," famously known for its ability to transform into a submarine. Although the real car lacked these fantastical capabilities, this purchase sowed the seeds for developing the Cybertruck's ability to handle water crossings.
Boat Mode
Lars Moravy, Tesla's VP of Vehicle Engineering, was showing off the Cybertruck during a segment on Jay Leno's Garage. He described the vehicle as nearly floating and suggested the possibility of attaching an outboard motor to the power outlet, turning the Cybertruck into a makeshift boat. Moravy's remarks prompted a response from the boss.
We are going to offer a mod package that enables Cybertruck to traverse at least 100m of water as a boat.
Elon Musk announced on X that there was an upcoming modification package for the Cybertruck. This "Boat Mode" will enable the vehicle to travel over 100 meters of water. Musk said the modification focuses mainly on improving the door seals in the cabin to improve water penetration.
Wade Mode
While Cybertruck learns to swim in the deeper water, it sticks to Wade Mode. Wade Mode, a unique engineering achievement, causes the Cybertruck to raise its air suspension to the highest point and then utilizes the air suspension compressor to pressurize the 123 kWh battery pack. This pressurization counteracts external water pressure, preventing water ingress. A screen message in Wade Mode instructs users:
"Raises ride height and pressurizes battery when driving through water. Water levels should not exceed the top of the bumper... Proceed at your own risk."
“May take up to 10 minutes to activate and has a time limit of 30 minutes, at which point it will automatically deactivate.”
This disclaimer indicates the system's ability to handle water up to 2 feet and 7 inches deep (about 79 cm).
Moravy explained to Leno, “We have new technology. We call it the scuba pack. we took the air suspension system to actually pressurize the battery. you know water and batteries don't really get along. that happens with the push of a button, forcing air into the pack. It is a sealed pack to keep the water out. It is just some positive pressure to keep any of those leak points or flood points.”
We call it the scuba pack
Competition, What Competition?
In the realm of electric pickups, this feature sets the Cybertruck apart. While other vehicles, like the Rivian R1T, offer substantial water-wading capabilities, they rely on conventional sealing techniques. Tesla's approach to dynamically alter the battery's internal environment is a novel solution that could redefine standards in EV design, particularly for off-road and all-terrain vehicles.
The Tesla Cybertruck's Wade Mode and eventual Boat Mode continue to exemplify Elon Musk's visionary ideas and a significant leap in electric vehicle design and capabilities. By actively altering the battery's internal environment to counter external conditions, Tesla sets new standards for what electric vehicles can achieve, particularly in off-road and challenging environments. This innovative approach could influence future designs in the EV space, paving the way for more versatile and resilient electric vehicles.
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Tesla’s been on a roll with Supercharger improvements lately, from the 325kW charging update for the Cybertruck, to 500kW with V4 Superchargers coming next year. While those improvements have been limited to the Cybertruck, Tesla didn’t put all their focus on their new flagship vehicle, but looked at their more affordable vehicles as well.
LFP Battery Heating
Tesla’s Superchargers can now heat LFP Batteries - those that are in the Model 3 and Model Y Rear Wheel Drive variants. This applies to Long Range and Standard Range models, which saw a limited run. This is another update included as part of the 2024 Tesla Holiday Update - which really arrived with a lot of unannounced new features and capabilities.
The change is pretty interesting - Superchargers of the V3 and V4 variety can now pre-heat batteries for Model 3 and Model Y vehicles equipped with LFP battery packs. That means those vehicles are able to get back on the road faster when it's extremely cold. Of course, Tesla still advises you to precondition before you arrive, saving drivers time and money.
Max de Zegher, Tesla’s Director of Charging, also commented on the new feature. Essentially, Tesla is inducing an AC (alternating) ripple current through the battery to warm it up. Keep in mind that Superchargers are DC charging. That means it is possible to get a cold-soaked LFP vehicle on the road 4x faster than before, assuming that it didn’t precondition at all and that it is in the worst-case scenario (below 0ºF).
In essence, Tesla is using some engineering magic to turn the circuits inside the LFP battery into an electric heater - and powering that heater through the Supercharger. An AC ripple current is a small oscillation in the DC charging current that generates heat through electrical resistance, warming up the battery. Those ripples are a byproduct of converting AC to DC and back - so Tesla is using the onboard charger to induce those ripples to warm up the battery. Definitely an innovative technique that’s really only possible with the versatility of the NACS connector.
We’re hoping Tesla can implement this across their full lineup of vehicles, but we’ll have to wait and see how it is trialed across LFP vehicles first and if it is even possible on vehicles with 2170 or 4680 battery packs.
Tesla launched two FSD updates simultaneously on Saturday night, and what’s most interesting is that they arrived on the same software version. We’ll dig into that a little later, but for now, there’s good news for everyone. For Hardware 3 owners, FSD V12.6.1 is launching to all vehicles, including the Model 3 and Model Y. For AI4 owners, FSD V13.2.4 is launching, starting with the Cybertruck.
FSD V13.2.4
A new V13 build is now rolling out to the Cybertruck and is expected to arrive for the rest of the AI4 fleet soon. However, this build seems to be focused on bug fixes. There are no changes to the release notes for the Cybertruck with this release, and it’s unlikely to feature any changes when it arrives on other vehicles.
FSD V12.6.1 builds upon V12.6, which is the latest FSD version for HW3 vehicles. While FSD V12.6 was only released for the redesigned Model S and Model X with HW3, FSD V12.6.1 is adding support for the Model 3 and Model Y.
While this is only a bug-fix release for users coming from FSD V12.6, it includes massive improvements for anyone coming from an older FSD version. Two of the biggest changes are the new end-to-end highway stack that now utilizes FSD V12 for highway driving and a redesigned controller that allows FSD to drive “V13” smooth.
It also adds speed profiles, earlier lane changes, and more. You can read our in-depth look at all the changes in FSD V12.6.
Same Update, Multiple FSD Builds
What’s interesting about this software version is that it “includes" two FSD updates, V12.6.1 for HW3 and V13.2.4 for HW4 vehicles. While this is interesting, it’s less special when you understand what’s happening under the hood.
The vehicle’s firmware and Autopilot firmware are actually completely separate. While a vehicle downloading a firmware update may look like a singular process, it’s actually performing several functions during this period. First, it downloads the vehicle’s firmware. Upon unpacking the update, it’s instructed which Autopilot/FSD firmware should be downloaded.
While the FSD firmware is separate, the vehicle can’t download any FSD update. The FSD version is hard-coded in the vehicle’s firmware that was just downloaded. This helps Tesla keep the infotainment and Autopilot firmware tightly coupled, leading to fewer issues.
What we’re seeing here is that HW3 vehicles are being told to download one FSD version, while HW4 vehicles are being told to download a different version.
While this is the first time Tesla has had two FSD versions tied to the same vehicle software version, the process hasn’t actually changed, and what we’re seeing won’t lead to faster FSD updates or the ability to download FSD separately. What we’re seeing is the direct result of the divergence of HW3 and HW4.
While HW3/4 remained basically on the same FSD version until recently, it is now necessary to deploy different versions for the two platforms. We expect this to be the norm going forward, where HW3 will be on a much different version of FSD than HW4. While each update may not include two different FSD versions going forward, we may see it occasionally, depending on which features Autopilot is dependent on.
Thanks to Greentheonly for helping us understand what happened with this release and for the insight into Tesla’s processes.
