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“Battery EV” vs “Hydrogen Fuel cell EV”
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PlainName:

--- Quote ---I think there's some regulation that these pumping stations need to be monitored, that's why they don't activate immediately when you lift the nozzle.  Someone is probably checking CCTV somewhere, but you could serve ten petrol stations with one CCTV attendant pretty easily, so it may well all be remote.  Not certain but that would be my guess.
--- End quote ---

Could well be. I noticed the Tesco one has CCTV but they are pointing at the queues rather than pumps (which is not to say there isn't one aimed there, just that I can't see one). But I don't think the nozzle thing is right since the nozzle won't work until you've entered your card details (and had them accepted). IME there doesn't seem to be any delay but, of course, that could be due to them getting ready to hit the button while I've been fumbling my loyalty care and debit cards :)
nctnico:
The pumps are not being enabled manually either way. It just takes time for the system to register what is going on.

What happens when you enter your debit/credit card on an unmanned station: the pump is enabled for a certain amount that is being reserved from your card. The typical amount I've seen is 150 euro (or less if there is less money in your account). The pump is then enabled to give out fuel up to that amount. When you need less than that amount, the remaining amount is credited and the final amount is being withdrawn from your account.
emece67:
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tom66:

--- Quote from: emece67 on March 29, 2022, 10:25:58 pm ---I wonder if, someday, I could trickle H2 into my car, H2 that I produced locally from my PV panels (or wind generator, or...).

--- End quote ---

H2 cars are 35MPa or 70MPa fuelled, so require equipment about the size of a car to just pressurise that.  Rather difficult to imagine that happening at home.

One method would be to charge up the small battery that most H2 cars have, if you didn't expect to produce much energy.  I seem to recall the Toyota Mirai has a 2kWh Li-Ion battery on board which is used to buffer the output from the fuel cell.  Fuel cells tend to be rather lethargic in ramping up production so the battery fills in the demand, and of course offers regen braking too.

...but then that's basically just a plug in hydrogen EV, which is a weird concept.
Miyuki:

--- Quote from: tom66 on March 29, 2022, 10:32:38 pm ---
--- Quote from: emece67 on March 29, 2022, 10:25:58 pm ---I wonder if, someday, I could trickle H2 into my car, H2 that I produced locally from my PV panels (or wind generator, or...).

--- End quote ---

H2 cars are 35MPa or 70MPa fuelled, so require equipment about the size of a car to just pressurise that.  Rather difficult to imagine that happening at home.

One method would be to charge up the small battery that most H2 cars have, if you didn't expect to produce much energy.  I seem to recall the Toyota Mirai has a 2kWh Li-Ion battery on board which is used to buffer the output from the fuel cell.  Fuel cells tend to be rather lethargic in ramping up production so the battery fills in the demand, and of course offers regen braking too.

...but then that's basically just a plug in hydrogen EV, which is a weird concept.

--- End quote ---
35MPa is not a huge issue
Look at Scuba tanks, they are commonly pressured to 30MPa with a small portable unit
I know it works with air so it is a safer medium
But technically it is not an issue at all
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