General > General Technical Chat
“Battery EV” vs “Hydrogen Fuel cell EV”
james_s:
I don't think that would be difficult at all. The only EV I've lived with for any length of time was a Tesla Model Y, it could charge from the basic charge cable at a rate of 15 miles of range per hour from a 240V 32A circuit, that could be done even with a cheap consumer 8 or 10kW generator. Realistically a roadside assistance vehicle could easily have ~150kW diesel genset and a full fledged mobile Supercharger to give you ~50 miles of range in 10 minutes and the same genset could provide a selection of other charging standards. This is really not that difficult of a problem.
Zero999:
Old EV batteries, with too lower capacity to be used in cars, can be repurposed for storing energy from the power grid.
Renewables can be fairly reliable. It depends on the location. Hydroelectric power can be very reliable. In Western Europe, wind is fairly reliable, especially in winter, but there needs to be enough turbines, over a large enough area, connected to the same grid.
nctnico:
--- Quote from: james_s on November 12, 2021, 06:53:52 am ---I don't think that would be difficult at all. The only EV I've lived with for any length of time was a Tesla Model Y, it could charge from the basic charge cable at a rate of 15 miles of range per hour from a 240V 32A circuit, that could be done even with a cheap consumer 8 or 10kW generator. Realistically a roadside assistance vehicle could easily have ~150kW diesel genset and a full fledged mobile Supercharger to give you ~50 miles of range in 10 minutes and the same genset could provide a selection of other charging standards. This is really not that difficult of a problem.
--- End quote ---
Now calculate the difference in cost between a 150kW generator compared to a jerry can and how that would reflect on your AAA subscription cost.
@Faringdon: KPMG publishes an automotive outlook every year which shows customer and technical trends for the automotive industry. It answers several of your questions: https://automotive-institute.kpmg.de/GAES2020/downloads/global_automotive_executive_survey_2020.pdf
wraper:
--- Quote from: nctnico on November 12, 2021, 10:52:10 am ---Now calculate the difference in cost between a 150kW generator compared to a jerry can and how that would reflect on your AAA subscription cost.
--- End quote ---
Except you cannot use a jerry can for hydrogen filling. It will be quite complicated and expensive system. Nor you necessarily need a 150kW generator. 10-20 minutes of charging at level 2 speed most likely will give you enough range to drive to the closest charging station, unless you are in the middle of nowhere. Or just tow it to the closest charging station. Nor you need a generator at all. 10-20kWh portable battery will do the job. Or you don't even need a portable battery. If roadside assistance vehicle is an EV, it can output power from its own battery.
mikeselectricstuff:
--- Quote from: Rick Law on November 12, 2021, 06:17:49 am ---I miscalculated once and ran out of gas. I walked to the gas station with a 2 gallon jug, filled it, and walked back to my car. That 2 gallons would take me 50+ miles, within the distance to the next gas station.
AAA (USA's largest motor club for road side assistance) would have come with a gallon or two of gas if I was members and called for assistance.
I think AAA (or the likes) has the capacity to carry a fuel cell should they decide to do so. They usually come in a small pick-up with other equipment, some including a generator for starter-battery and jumping. I doubt they would be able to come with large enough a generator to charge up your car for another 20 to 50 miles in short duration. In USA mid-west States, finding a common gas station in the middle of night (1am to 6am) can be iffy within 50 miles. I doubt charging stations will be more available than common gas stations any time soon.
I think the lack of an easily portable energy source is a huge disadvantage. In that context, fuel cell at least have some hope, EV's that is plug-in charging only has much less hope...
--- End quote ---
In the UK, the AA, one of the major breakdown companies is already using a big alternator on the van's engine for EV emergency recharging. I don't recall offhand the power rating.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version