Yesterday Tesla announced that their CFO, Zachary Kirkhorn would depart
Tesla
In a surprising turn of events, Tesla's CFO, Zachary Kirkhorn, known to many as the 'Master of Coin', has announced his resignation. Like any business, small or large, people come and go. But this isn't an average person at a normal company. Kirkhorn was deep in the trenches from the early days of the little start-up electric car company, and his departure leaves us only to speculate what happened and what happens now both at Tesla and for Kirkhorn.
Tesla Today and into the Future
The short answer to what happens now is Kirkhorn will stay on until the end of the year; however, his responsibilities have been handed over to Vaibhav Taneja, Tesla's Chief Accounting Officer since 2019 after joining the company in 2017 following the purchase of SolarCity.
Kirkhorn is going out with his head held high and still a true believer in Tesla's vision, as he is sticking around for four more months to help with the transition. In his LinkedIn post, which he only publicly posts about once a year, he said:
Being a part of this company is a special experience and I’m extremely proud of the work we’ve done together since I joined over 13 years ago.
Reason for Leaving is Unknown
There are no clues about what is next for Kirkhorn or why he is leaving. So, that would lead many to believe there must've been an issue at the top, Elon Musk. While that is certainly not out of the realm of possibility, both men seemed to be playing nice on social media. Kirkhorn stated on Linkedin, "I want to thank the talented, passionate, and hard-working employees at Tesla, who have accomplished things many thought not possible. I also want to thank Elon for his leadership and optimism, which has inspired so many people."
Musk posted on X.com, "I would like to thank Zach Kirkhorn for his many contributions to Tesla over the course of 13 often difficult years. Much appreciated, and best wishes for the next stage of his career."
Kirkhorn replaced Deepak Ahuja who left Tesla in 2019. Ahuja had been in the CFO role since 2010 the same year Kirhorn joined Tesla. Kirkhorn's rise through the ranks was both meteoric and pivotal. Serving in various capacities, including Senior Manager, Director, and Senior Director, he assumed the role of CFO in March 2019.
The Succession Plan
Succession at Tesla has been a concern for years, and it should be. We saw what happened when Musk bought Twitter and split his attention - the stock sank. We can only imagine what was happening behind the scenes. Still, when Musk committed to putting his attention back to Tesla, he implemented a hiring freeze and said all major personal decisions had to go through him.
Kirkhorn would've been on everyone's bingo card as a shortlist candidate to be the next CEO at Tesla, as his impact on the company's trajectory is indisputable. During his tenure, Kirkhorn played an essential role in transforming Tesla from a company fraught with losses to a consistently profitable enterprise. His expertise has been instrumental in Tesla's first quarterly profit, achieving a market valuation of over $1 trillion and strategizing the launch of products like Model 3 and the anticipated Cybertruck.
Kirkhorn's dedication to the company was undoubtedly monumental and likely far bigger than we will ever know, but he is replaceable. Just as we saw with the departure of Andrej Karpathy, the leader of the Full Self-Driving department, the company will continue. It's been a highly sought-after company for many bright minds to work at, and that kind of talent pool will help when the big players leave. But Tesla still has to come up with an answer for the succession plan for Elon Musk.
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.
