Tesla Inc. surprised Wall Street last week with a commercial truck with larger-than-expected battery range and a reboot of its iconic Roadster ultra-luxury sports car, but Michael Kramer, a fund manager with Mott Capital Management, thinks there’s even bigger news.

Most significantly, Tesla TSLA, +4.42% mentioned “hypercharging,” which would recharge a Tesla Semi in half an hour in locations yet to be disclosed.

“I’d have to imagine that Tesla has figured out how to put this technology on all of their cars, which means every car could get a full charge in under 30 minutes,” Kramer wrote in a blog post.

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Additionally, it is “genius” that Tesla could use solar energy to power future “hyper” charging stations, he said.

Tesla has several locations offering “supercharging,” or fast-charging devices clustered in stations usually located on main highways in the U.S. and abroad. The stations are geared to Tesla’s passenger cars.

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Kramer also pointed out that the new version of the Roadster is equipped with a larger battery, enabling the sports car to go 620 miles between charges, compared with just 351 miles for certain Model S configurations.

Once the Model S “is equipped with the 200 kWh battery pack in the new Roadster, which I can’t imagine is too far down the road, the range issue for the Tesla is officially dead,” he said. “The Model S would likely be able to drive further on one charge than a car on a full tank of gasoline.”

Read more:Wall Street heaps praise on Tesla Semi, Roadster

Tesla shares on Monday gave back some of the gains posted last week after the unveiling of the Semi and new Roadster. The stock is down more than 7% for November, compared with gains of around 0.3% for the S&P 500 index. SPX, -1.11%

In the past three months, the shares are down 12%, compared with a 6.5% advance for the S&P. The shares are still outperforming for the year, up 43% compared with the benchmark’s 15% gain.