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A comment on Volvo and Daimler bet on hydrogen truck boom this decade. Parent comment

Re:Volvo and Daimler bet on hydrogen truck boom this decade by gambiting on Wednesday May 12, 2021 @09:10AM (#27129918)
There are? Here in UK you have Type 2(can be safely ignored for this, pretty much only used for at-home charging up to 7kW single phase or 21kW triple phase), Chademo(only used by the leafs and other Nissan cars) and CCS. CCS being the most common, there are motorway charging stations with super modern 250kW chargers and they only have CCS, so no issue with compatibility at all. Basically all new cars have CCS connectors, it's the standard.

And yes, CCS supports either 400 or 800V charging, but that's seamlessly negotiated by the car once connected, I don't see that as a problem here.

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Re:Volvo and Daimler bet on hydrogen truck boom this decade by SigmundA on Wednesday May 12, 2021 @10:27AM (#27130705)
A large truck will not be able to use a CCS charger even at 800v for under an hour. The Tesla semi look to be using a special connector with 4 parallel DC connections while a CCS2 is only a single pair.

Your going to need a Megawatt for reasonable charge times, CCS tops out a 400kw at 1000v and 400amps with liquid cooled cables and connectors.

BTW a diesel truck pump puts out about the equivalent of 6 megawatts after efficiencies are normalized.

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Re:Volvo and Daimler bet on hydrogen truck boom this decade by gambiting on Wednesday May 12, 2021 @10:58AM (#27131110)
Like I said in another comment - commercial drivers have to stop for 8 hours every 8 hours of work by law anyway(in UK/EU), so there's plenty of time for charging. Even at the relatively common 150kW charging speed you're charging 1.2MWh(!!!) Capacity every 8 hours. I really don't think trucks will come with megawatt-hour capacity batteries, but if they do then 8 hours are long enough to charge such a battery with infrastructure that exists today.
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Re:Volvo and Daimler bet on hydrogen truck boom this decade by SigmundA on Wednesday May 12, 2021 @11:28AM (#27131444)
Tesla is claiming "under 2kwh/mile" for their semi. At 2kwh/mile your looking at a megawatt for 500 miles range which is close to an 8 hour drive.

There will need to be stall where a semi can park for 8 hours using a charger.

Local deliver makes sense also city buses obviously and thats already happening. Long haul will need a lot more charging infrastructure to make sense.

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