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CommodoreAmiga

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Do you think the Amazon vans will have access to the network or have their own dedicated chargers?
I assume they'll charge back at their distribution centers. That way the vehicles can charge while drivers are no "on the clock".
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Ladiver

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I consider the word from customer service reps as solid as someone's claims that they had a recent snowball fight on the surface of the sun.
Last week, a friend told me that his friend knows a guy who knows Elon Musk and they went to the sun for a snowball fight after the last big storm. They stopped on Mars for lunch. Sounded legit to me. ?
 

Fenwayfan77

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Last week, a friend told me that his friend knows a guy who knows Elon Musk and they went to the sun for a snowball fight after the last big storm. They stopped on Mars for lunch. Sounded legit to me. ?
Um, he's sick. My best friend's sister's boyfriend's brother's girlfriend heard from this guy who knows this kid who's going with the girl who saw Ferris pass out at 31 Flavors last night. I guess it's pretty serious.
 

Mysta

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Can you get to 300kw with 480v using any of the available chargers?
Not that I’m aware. I think EA does 350amp max. Tesla does like 525 very briefly. 300kw at 480 would be 625.
 

azbill

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Can you get to 300kw with 480v using any of the available chargers?
No you cannot achieve that rate at 480V. You need a minimum of 600V to achieve 300KW, due to the 500A current limit.

FYI, charging at 300KW/800V, will not reduce the current to each cell, it will be more. Take simple example, of having 2 battery cells in parallel, that are say 10V each cell. If I charge at 20W, that is 2A total current. But that 2A is split evenly between the two parallel cells, thus each one sees only 1A of current. Each cell sees 10W of power.

If I reconfigure the 2 cells in series, I now have 20V across the 2. Charging those in series at 30W, that is a current of 1.5A through each cell. That means each cell is seeing 15W of power.

No matter what voltage you use for charging, the total KW power still gets evenly distributed between the total number of cells. The difference in heat is only seen in the single wire going from the charger to the battery, not within the cells themselves.
 

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Mysta

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EA does have 500A chargers.
Signet350KW.jpg
Ah good to know, 350 must be cap at 1000v only, still doesn’t mean 300kw at 480v though.
 

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Do you think the Amazon vans will have access to the network or have their own dedicated chargers?
I would imagine they would work but consider it a moot point as they will be charging at the warehouses during down time.
 

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Do you think the Amazon vans will have access to the network or have their own dedicated chargers?
Mostly, they will be charging overnight at their depots, so I don't think we will see any at the RAN network.
 

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Last week, a friend told me that his friend knows a guy who knows Elon Musk and they went to the sun for a snowball fight after the last big storm. They stopped on Mars for lunch. Sounded legit to me. ?
The Sun part I get. Nothing more than a 16-minute round trip.
Too hot? Duh! Go at night!

Mars for lunch? They're still on lockdown. Not gonna happen....

"Look! Come on, man! Believe the science!"
 

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Ah good to know, 350 must be cap at 1000v only, still doesn’t mean 300kw at 480v though.
The EA chargers actually have a limit of 920V. While they can do 500A at some voltages, they are limited to 375A at 920V.

I'm a bit confused as to where the 480V number you use is coming from. That would imply a 114s pack configuration. Everything they have shown (which may or may not be what the production vehicles will be) is 108s.
 

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I've seen multiple articles & references to 450V peak.
 

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The EA chargers actually have a limit of 920V. While they can do 500A at some voltages, they are limited to 375A at 920V.

I'm a bit confused as to where the 480V number you use is coming from. That would imply a 114s pack configuration. Everything they have shown (which may or may not be what the production vehicles will be) is 108s.
Wasn’t sure on voltage so just chose a generous one in the 400 range.
 

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Ah good to know, 350 must be cap at 1000v only, still doesn’t mean 300kw at 480v though.
Not all EA chargers are rated to 500A, the picture here is from a Signet unit. ABB units have 400A limit for 350KW chargers and 350A limit for 150KW chargers. There are two other vendors used, but I have not run across those units to have a look at the ratings.

Why is this important to know? If you plug into an ABB charger with a 400A limit, but rated to 350KW, you will only get 160KW when charging at 400V. But if you plug into the newer Signet unit with 500A, then you can get 200KW at 400V. The ABB charger can provide 350KW to a car charging at 900V, since slightly less than 400A is needed. But at 800V, you can only get 320KW with the ABB charger.
 
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mkennedy1996

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Not that I’m aware. I think EA does 350amp max. Tesla does like 525 very briefly. 300kw at 480 would be 625.
That is what I thought. So 300kw at anything less than 800V seems to be off the table.

There has been so much speculation on this forum about battery voltage and peak charging Kw. Some seem to act as though they know, the indications from Rivian then seem to contradict those here that purport to know the final answer.

I will be the first to say that I do not know the answer. I look at the guideposts along the trail and try to see where they point. Presently, we have some guidance from Rivian that appears to contradict other guidance.

Voltage: It does appear that the battery in the LEs will be around 400V. RJ has stated in an interview that 800V is coming, just not in the first vehicles. He also stated in an interview that 300kw charging would be possible and now the website indicates that 300kw charging will be possible. Since, apparently, you can't get 300kw charging without going to about 800V (more or less), then this is another indicator that 800V (more or less) is coming in the near term.
Best Guess: 400V now going to 800V soon

Charging kW: The data from Rivian has varied from 160 to the more current 200kw as the charging kw for the vehicles. The charging speeds quoted thus far also point to 200kw charging (180.6kw average sustained for 20 minutes). The engineer in the winter testing video also mentioned testing at 500amps. 500amps at 400V is 200kw. RJ in multiple interviews and the Rivian website have indicated that 300kw is coming.
Best Guess: 200kw now going to 300kw soon

LE Vehicle Adaptability: Rivian has said that the LEs will be limited to 200kw at launch. However, some of the responses from Rivian Support indicate that the LEs will be upgraded to 300kw after delivery sometime in the future. I am hopeful but skeptical. The powertrain is designed around a Voltage architecture. A software change doesn't seem likely to change the motors from 400V to 800V. They do have a patent that can split the battery into two parts when charging to allow 800V - 300kw to be used with 400V - 150kw going to each half of the battery at the same time. It could be that the firmware for this switching process is not ready, but the hardware is installed. I am struggling with another way to upgrade existing vehicles to 300kw.
Best Guess: Open

What am I missing?
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