General > General Technical Chat

“Battery EV” vs “Hydrogen Fuel cell EV”

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richard.cs:
EV batteries getting bigger doesn't really cause a problem for home charging unless people also drive more miles per day. If you changed from your 30 kWh EV to a 100 kWh one and kept the same driving pattern you'd not need any more energy overnight.

ogden:

--- Quote from: richard.cs on November 20, 2021, 10:01:12 pm ---If you changed from your 30 kWh EV to a 100 kWh one and kept the same driving pattern you'd not need any more energy overnight.

--- End quote ---
Right. Most likely you won't do long trips every day. If you actually do - better reconsider your choice of transportation occupation.

james_s:
Even if you only have 8 hours per night to charge that's around 120 miles per day of range, even if you assume people start driving ludicrously large and heavy EVs that can only charge 10 miles per hour from a 32A circuit that's still 80 miles a day. Figure most people will also have considerably more charging time available over the weekend assuming they aren't running around all weekend. The *vast* majority of people will have more than enough charging time, especially considering 8 hours a night is a very conservative estimate, 12+ hours is more likely. The only thing that matters is the average daily consumption vs the average daily recharge time. If you drive an unusually large amount you might visit a high powered charging station every now and then to get caught up but you'd still want to charge at home as often as practical. The more you charge at home the less of the more expensive electricity you'd need to buy from the public fast charger.

PlainName:

--- Quote ---As smart chargers are rolling out I’m seeing 24 hour rolling rate changes
--- End quote ---

That's something to think about. Overnight charging is cheap now because it's a dead period when people are mostly asleep and demand is low. Once EV charging is common, demand will be high and the price wil rise accordingly. It could get to the point where daytime charging (when everyone is driving) is cheaper!

Miyuki:

--- Quote from: dunkemhigh on November 21, 2021, 09:59:59 am ---
--- Quote ---As smart chargers are rolling out I’m seeing 24 hour rolling rate changes
--- End quote ---

That's something to think about. Overnight charging is cheap now because it's a dead period when people are mostly asleep and demand is low. Once EV charging is common, demand will be high and the price wil rise accordingly. It could get to the point where daytime charging (when everyone is driving) is cheaper!

--- End quote ---
How many hours a day do you drive 1, 2, do not tell me you drive more than 2 hours a day
The rest of the time car just sits somewhere and can scavenge low demand/renewable production peaks from the network
Grid is enough "smart" for it even today
And how long it will take till BEV will be the majority? 10, 15 years?

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