What Wall Charger to Buy???

[ajdelange]

What does linearity have to do with it? Who said any thing was linear?

You did:

Think about it. A battery manufacturer publishes a curve showing capacity vs number of cycles. User A runs 1 MWh of juice through his charging and discharging at 10C. User B runs 1 MWh of juice through his charging and discharging at C/10.

"Well how about 5C and C/5 or 2C and C/2?"

You must have some very strange notion as to what "linear" means.

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[Crissa]

You must have some very strange notion as to what "linear" means.

Ahh, so when you posit linear formula, you don't mean what you say, but I'm supposed to guess because reasons?

-Crissa

 

[ajdelange]

Ahh, so when you posit linear formula, you don't mean what you say, but I'm supposed to guess because reasons?

But I never said anything about a linear formula. Can you please tell me where you think I did?

 

[Crissa]

But I never said anything about a linear formula. Can you please tell me where you think I did?

These are linear:

Think about it. A battery manufacturer publishes a curve showing capacity vs number of cycles. User A runs 1 MWh of juice through his charging and discharging at 10C. User B runs 1 MWh of juice through his charging and discharging at C/10.

"Well how about 5C and C/5 or 2C and C/2?"

It's not even a colloquial or special version of linear. They are just straight razor lines when graphed.

-Crissa

 

[ajdelange]

Referring to the first quote: How do you graph a curve as a straight line?

Referring to the second quote graphing 5C, C/5, 2C and C/2 would result in sets of 4 points parametric in C. How do you get a razor line out of that?

I've been dealing with linear equations since high-school and I've never heard of a "colloquial" or "special" version of one. Can you explain what you mean by those terms?

Wait a minute. You don't think we are plotting 5 as the dependent variable and C as the independent variable do you? No, no, no. Those are charge rates expressed in the standard notation. C/5 means a current one fifth of the battery's capacity e.g. a 100 Ah battery would be charged at 20 A (and take 5 hr to charge).

[Edit]Does special maybe mean an equation in a set of overdetermined, underdetermined or inconsistent linear equations?

 

[Crissa]

Be my guest, Ajd, graph the formula that you wrote, please.

What you wrote. Not whatever is in your head.

-Cridda

 

[ajdelange]

Be my guest, Ajd, graph the formula that you wrote, please.

What you wrote.

I would be happy to except that I didn't write any formulas. You show me a formula that can be graphed and I'll happily graph it for you but there simply aren't any formulas in these posts!

Just so you know what a formula looks like

y = m*x + b

would be one. A graphable formula has a dependent variable (y) and one or more independent variables (x) and in the case of this linear example two constants, m and b. Do you see anything like that in my posts?

10C is not a formula or equation. It is a constant. C/10 is not a formula either. They represent normalized charge rates of, repectively, 10 and 0.1. I suppose a few of those constants could be plotted along the real number axis in which case the "graph" would look like this:

Is that what you are looking for?

 

[Crissa]

Just so you know what a formula looks like

y = m*x + b

That's an equation. It's a subset of formula.

Is that what you are looking for?

Literal again, and yet wrong and yet you can't see that it's a line.

There's a reason I had you on ignore.

-Crissa

 

[ajdelange]

That's an equation. It's a subset of formula.

In non equation form a linear dependence between x and y would be expressed as something like "y depends on the first power of x multiplied by a constant plus another constant." But no one would say that. They'd simply say "y is linear in x" or "y is a linear function of x". People who paid attention in high school math class would understand that. Why can't you? Do you see any words like these in the paragraph in question to suggest a linear dependence between any thing and anything else?

Literal again, and yet wrong and

Since you asked me to graph the formula in my post and there is no formula in my post I can't do what you ask literally and therefore must try to guess at what you are thinking of and came up with the idea of "graphing" the points on the real number line. And there is certainly nothing "wrong" with my graph. What do you think is wrong with it?

yet you can't see that it's a line.

When I say I am going to plot some points on the real number axis your comment suggests that I don't know that an axis is a line. Which is obviously more noise as I clearly drew a straight (or as nearly straight as I could make it) line.

There's a reason I had you on ignore.

Please put me back on ignore. I have taken this as far as I have in order to see where it might go. Frankly I am amazed that there are people who have so little understanding of basic maths! But it is clear that rational discussion of concepts involving basic maths is not possible with you. Cheers.

 

[bradenbarlow]

One other thing. Tesla’s wall connector is about half the cost of most of the similar J1772 based chargers.

Even if you have another brand of car it’s cheaper to have the Tesla wall connector and buy the Tesla -> J1772 adaptor.

Very good point, Ogre.

 

[SwampNut]

“Batery”

 

[Nidavellir]

Any clue when the Tesla Wall Connector with the new Cybertruck plug will become available?

 

[Crissa]

Any clue when the Tesla Wall Connector with the new Cybertruck plug will become available?

There won't be a new plug. The Cybertruck will support NACS (nax) aka the Tesla plug.

-Crissa

 

[Ogre]

What Crissa said, the current Wall Connector is the best and most future proof power source for EVs.

 

[Nidavellir]

There won't be a new plug. The Cybertruck will support NACS (nax) aka the Tesla plug.

-Crissa

So the CyberTruck is supposed to use mega chargers like the semi but the semi has a different connection. So how will the CyberTruck charge at mega chargers? An adapter?

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