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Heavy-duty BEVs like the Tesla Semi won’t work—biofuels a better option: Bill Gates

(Credit: Jerome Guillen/LinkedIn)

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5 years ago

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Bill Gates’ recent post about electric vehicles contained a number of interesting insights about his views on electrification. While the Microsoft co-founder noted that EVs present an ideal solution for short-haul travel, he argued that battery-electric vehicles will probably never be a practical solution for heavy-duty machinery like 18-wheelers. This makes vehicles like the Tesla Semi inherently flawed, at least according to the tech visionary. 

Gates explained in his post that EVs do not work as long-haul vehicles like semitrailers because batteries are big and heavy. According to Gates, this results in an inherent problem, since moving more weight would require batteries, and more batteries would result in additional weight. Thus, even if electricity is drawn from zero-carbon sources, and even with innovations in battery tech, there are simply things that batteries would not be best at. 

“The problem is that batteries are big and heavy. The more weight you’re trying to move, the more batteries you need to power the vehicle. But the more batteries you use, the more weight you add—and the more power you need. Even with big breakthroughs in battery technology, electric vehicles will probably never be a practical solution for things like 18-wheelers, cargo ships, and passenger jets. Electricity works when you need to cover short distances, but we need a different solution for heavy, long-haul vehicles,” Gates wrote. 

With this in mind, the tech visionary explained that cheap alternative fuels would be a much better option than all-electric vehicles for long-haul travel. Gates noted that there are several types of these alternative fuels, though he took a particular focus on biofuels and electrofuels. The Microsoft co-founder explained that biofuels today are far different than the biofuels of the past such as ethanol. He added that some biofuels could be drawn from plants that aren’t grown for food, and some could even be used in existing engines without requiring any modifications. However, challenges remain with the rollout of biofuels for long-haul travel. 

“I’m optimistic about these biofuels, but it’s too soon to think about replacing gasoline and other fossil fuels with them. Research on advanced biofuels is still underfunded, and they aren’t ready to be deployed at the scale we need. We need a lot more innovation before they become a realistic, cost-effective option for long-haul transportation,” the Microsoft co-founder wrote. 

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Gates also discussed electrofuels, which combine the hydrogen molecules in water with the carbon in carbon dioxide to create a liquid fuel that could work in existing internal combustion engines. According to the tech visionary, electrofuels have a lot of potential, but they remain very expensive, costing about 3 to 7 times the price of fossil fuels. The billionaire also noted that for electrofuels to work, the electricity used to create them would need to come from zero-carbon sources. 

Interestingly enough, Gates’ recent post on electric vehicles did not mention Tesla at all, nor any of the company’s projects. That being said, the tech visionary’s remarks do suggest that he does not believe that the Tesla Semi could be a viable alternative to fossil fuel trucks. Gates’ stance would likely be put to the test soon enough, however, since Tesla CEO Elon Musk has stated that it is now time for the Semi’s volume production to start. This suggests that Tesla has finalized the design and specs of the Semi, whose production version will likely meet or even exceed its impressive specs, which were announced over two years ago. 

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Simon is an experienced automotive reporter with a passion for electric cars and clean energy. Fascinated by the world envisioned by Elon Musk, he hopes to make it to Mars (at least as a tourist) someday. For stories or tips--or even to just say a simple hello--send a message to his email, simon@teslarati.com or his handle on X, @ResidentSponge.

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Tesla exec hints at FSD Mad Max mode’s killer feature

The release notes of Tesla’s v14.1.2 FSD update indicate that Mad Max mode “comes with higher speeds and more frequent lane changes than Hurry.”

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24 minutes ago

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October 16, 2025

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Credit: @BLKMDL3/X

Tesla may have just rolled out its boldest Full Self-Driving (FSD) upgrade yet, but the company’s Head of AI, Ashok Elluswamy, hinted at the recently released “Mad Max” mode’s actual killer feature.

As per the Tesla executive, FSD’s Mad Max mode is designed to provide drivers with optimum driving performance during what are commonly the most tedious driving conditions on real-world roads.

Where Mad Max mode truly shines

Tesla drivers and longtime FSD users responded positively to the rollout of Mad Max mode. The performance of the update was so notable that @WholeMarsCatalog, a longtime FSD tester, described it as epic. The FSD tester’s comments were posted on X as videos of Mad Max mode’s real-world performance were being shared online.

In response to the Tesla owner and longtime FSD tester, Elluswamy noted that drivers would probably love Mad Max mode even more during daytime hours, when traffic is denser. “You’ll love it more during day time / denser traffic. Really showcases its decision making,” the Tesla executive wrote in his post.

The release notes of Tesla’s v14.1.2 FSD update indicate that Mad Max mode “comes with higher speeds and more frequent lane changes than Hurry.” Videos shared online showed that Mad Max mode, despite its assertive driving style, is still a very cautious and safe driver, similar to past FSD releases.

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Made for real-world traffic and long commutes

Traffic congestion typically peaks during daytime hours, when drivers could at times spend hours navigating crowded intersections and fast-changing lanes. For many Tesla owners, having an FSD mode that can confidently manage that chaos could be a game-changer.

Simply put, the feature’s extra assertiveness could allow Mad Max mode to excel in the kind of traffic that tests even the most patient drivers. By improving decision-making in those conditions, the company may be positioning FSD as a true solution for the everyday stress of stop-and-go commutes, packed freeways, and unpredictable city driving.

The “Mad Max” name itself isn’t new. Elon Musk first teased it back in 2018 as a playful nod to aggressive freeway driving. Its reappearance in Tesla’s modern FSD system, however, hints at the notable maturation of Tesla’s autonomous driving efforts over the years.

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Investor's Corner

Tesla’s comfort level taking risks makes the stock a ‘must own,’ firm says

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5 hours ago

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October 15, 2025

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Credit: Tesla

Tesla (NASDAQ: TSLA) had coverage initiated on it by a new firm this week, and analysts said that the company’s comfort level with taking risks makes it a “must own” for investors.

Melius Research and analyst Rob Wertheimer initiated coverage of the stock this week with a $520 price target and a “Buy” rating. The price target is about 20 percent higher than the current trading price as shares closed at $435 on Wednesday, up 1.38 percent on the day.

Wertheimer said in the note to investors that introduced their opinion on Tesla shares that the company has a lot going for it, including a prowess in AI, domination in its automotive division, and an incredible expertise in manufacturing and supply chain.

He wrote:

“We see Tesla shares as a must-own. The disruptive force of AI will wreck multitrillion-dollar industries, starting with auto. Under Musk’s leadership, the company is comfortable taking risks. It has manufacturing scale and supply chain expertise that robotics startups possess more by proxy. It can rapidly improve and scale autonomy in driving, the first major manifestation of AI in the physical world.”

However, there were some drawbacks to the stock, according to Wertheimer, including its valuation, which he believes is “challenging” given its fundamentals. He said the $1 trillion market cap that the company represented was “guesswork,” and not necessarily something that could be outlined on paper.

This has been discussed by other analysts in the past, too. Yale School of Management Senior Associate Dean Jeff Sonnenfeld recently called Tesla the “biggest meme stock we’ve ever seen,” by stating:

“This is the biggest meme stock we’ve ever seen. Even at its peak, Amazon was nowhere near this level. The PE on this, well above 200, is just crazy. When you’ve got stocks like Nvidia, the price-earnings ratio is around 25 or 30, and Apple is maybe 35 or 36, Microsoft around the same. I mean, this is way out of line to be at a 220 PE. It’s crazy, and they’ve, I think, put a little too much emphasis on the magic wand of Musk.”

Additionally, J.P. Morgan’s Ryan Brinkman said:

“Tesla shares continue to strike us as having become completely divorced from the fundamentals.”

Some analysts covering Tesla have said they believe the stock is traded on narrative and not necessarily fundamentals.

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Tesla launches ‘Mad Max’ Full Self-Driving Speed Profile, its fastest yet

Published

10 hours ago

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October 15, 2025

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Credit: Teslarati

Tesla launched its fastest Full Self-Driving Speed Profile with the v14.1.2 Software Update on Wednesday, as “Mad Max” mode has overtaken “Hurry” as the most spirited travel option on FSD.

On Wednesday evening, Tesla’s Head of AI, Ashok Elluswamy, teased that the v14.1.2 Software Update would be released to those drivers in the Early Access Program (EAP). He said it was a “much-awaited feature.”

Tesla just teased something crazy with the next Full Self-Driving update

Many people, myself included, believed it would be the introduction of “Banish,” which would be a perfect complement to the Actually Smart Summon (ASS) suite, as it would find a parking spot and park itself after dropping you off at the front door of your destination.

However, Elluswamy’s post on X finished with two emojis: one a race car, the other being smoke behind the car.

On Wednesday night, we received the v14.1.2 software update to the new Model Y, which revealed that “Mad Max” mode was the new addition:

The release notes state that:

“Introduced new speed profile MAD MAX, which comes with higher speeds and more frequent lane changes than Hurry.”
It is pretty interesting that Tesla would introduce yet another speed profile that is even faster and more aggressive than “Hurry.” Personally, I’ve found Hurry to be realistic in terms of other drivers and their aggressiveness, speed of travel, and overall lane change behavior, especially on interstates.

Mad Max mode will be an interesting adjustment.

Tesla CEO Elon Musk first talked about Mad Max mode back in 2018 in posts on X, first mentioning the feature with the Tesla Semi:

Musk then teased Mad Max mode in 2019 with an early Autopilot update, stating that it would be an ideal option for aggressive traffic seen in places like Los Angeles. There was formerly a mode of the same name back in the late 2010s:

Now that it’s here, we’ll be testing it very soon and giving you a good idea of what to expect when it releases to others in the coming weeks.

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