CARB stamped the Tesla Semi this month. 822 kWh in the Long Range, 548 in the Standard. The number everyone's reaching for is the battery size. The number that matters is the efficiency: 1.7 kWh per mile under full load. That's now a regulator-stamped data point. European trials of the Mercedes eActros 600 are landing in the same range at 40-tonne weights. After years of arguing about whether heavy electric trucks can do real work, the maths is settled.
But that's not the point.
The point is that the Tesla Semi specifically doesn't matter to UK distribution. The 822 kWh pack is a US answer to a US question. Their Class 8 runs at 82,000 lbs, about 37 tonnes. We run to 44. Most UK trunk routes don't need 500 miles of range. They need 200 to 300 with a reliable plug at the destination and a tractor that's actually where it's supposed to be at six in the morning. Tesla isn't selling the Semi in Europe at scale. By the time anything from that Nevada line points at the UK, our market will already have settled around the OEMs actually trading here.
So why does the filing matter? Because it's a proof point on a curve. And the curve is steepening.
Take Windrose. Chinese R700, 700+ kWh, single central driving position, longer than most UK operators will look at twice. The British driver response will be predictable. Wrong cab, won't fit, no thanks. Every objection is probably correct. But that's the wrong way to read it. The next one will be shorter, or have a normal driving position, or carry a different battery chemistry, or all of the above. The relevant question isn't whether this specific vehicle suits a UK fleet. It's what the third iteration looks like, and whether you've got the depot ready for it.
Same with the Semi. The truck isn't coming. The 1.7 kWh per mile is.
This is where operators keep getting the eHGV story wrong. We read each product launch as a one-shot pass or fail. Does this vehicle work for my routes? Does it fit my yard? Will my drivers tolerate it? Those are the right operational questions, but they only matter for the procurement decision in front of you. The strategic question is different. It's whether you can see the rate of improvement, and whether your business is positioned to take the next two generations rather than the current one.
By the time you've upgraded your grid connection and figured out how you're going to charge it, the truck you need will probably exist. It likely already does. The depot work is the long lead time. The truck choice is the short one. Operators who get that order right will be running electric at scale while the rest are still debating whether the latest launch has enough range.
Every truck OEM I've spoken to in the last 18 months has the same internal trajectory. Lighter packs. Better efficiency. Faster charging. Prices coming down as cell production scales. The CARB filing is just one external data point confirming what's happening inside the development pipelines. Tesla's Nevada factory is targeting 50,000 trucks a year. That's industrial-scale ambition aimed at North American Class 8, but it tells you what the global cell supply curve looks like. That's what feeds Volvo, Mercedes, DAF, Renault, Scania, and everyone else.
The instinct, when you see a battery that big, is to assume we need the same. We don't. The instinct, when you see a Chinese truck with a weird cab, is to dismiss it. Don't.
Watch the curve. The next truck on it will be better than the last.
Destination: Centurion Truck Rental magazine (external placement)
Contact: Lindsay Fletcher, Marketing Manager, Centurion Truck Rental ([email protected])
Byline: Jamie Sands, Head of Solutions, Welch Group
Status: Draft ready to send to Lindsay
Current Centurion magazine reference: https://www.centuriontruckrental.co.uk
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