Recommended home charger system for Cybertruck?!

[CyberGus]

Yes, and you still are. Read my previous post and see if you can figure out why. Nobody likes what they've said twisted around into something completely different.

To be fair, his name is literally "Ogre"

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[PilotPete]

Forgive me, maybe I missed a post where the top poster said they run a business with multiple trucks.

Thought I was clear that I was talking about the general case not fleets or heavy users. He did say “home use” in the top post.

It was very clear, and then you mentioned job sites. And then others talk in this and other threads about “work trucks” So I was just wrapping all the discussions into a single response.

I don’t (always) use the reply as the “rebuttal” button. Generally I use it to carry on a thought. My apologies if I wondered too far off thread or it sounded like I was singling you out as wrong. If you haven’t noticed yet, that’s not my style. I don’t get on here to troll or hate or prove anything. I always try to make it a respectful discussion. Of course, every now and then someone says something so uninformed I do get a little edgy in my response. But with all respect Mr. O., your post wasn’t one of those.

 

[Billyboy]

Can someone tell me if my panel is up to task? We built our house in summer of '01

 

[Billyboy]

Alpine, u have a 200A main breaker, so your panel is capable but u r out of space.

 

[Billyboy]

Alpine, u have a 200A main breaker, so your panel is capable but u r out of space.

 

[Greshnab]

Possibly but no... possibly in that you have 200 amps incoming so that is prolly eough power for the charger.. no because you would need room to add a 60 amp breaker <2 30 amp breakers ganged> ad you don't appear to have room for 2 new breaker.

 

[CyberGus]

Can someone tell me if my panel is up to task? We built our house in summer of '01

How many ovens do you have lol

 

[Billyboy]

U could have a 100A sub-panel installed and move one of your appliances double breaker & wires into it and power it from the newly opened space.

 

[JBee]

How many ovens do you have lol

But no lights?

 

[Crissa]

Look at the specs of any battery charger on the market...

And to be clear I was saying that two smaller chargers, running at or near maximum capacity, would be more efficient than one large charger running at or below 50% capacity.

...Well, then you admit you're incorrect about chargers for batteries as large as EVs. Because you weren't looking at EV chargers.

It’s been reported it costs Tesla mid $40 k to install a supercharger but they also have a big factory pumping them out and it costs the competition 5x to install a DCFC

Oh, no, that's their equipment cost. It costs even more to install the chargers, because permits and laying high power lines integrated into the grid.

-Crissa

 

[azjohn]

...Well, then you admit you're incorrect about chargers for batteries as large as EVs. Because you weren't looking at EV chargers.


Oh, no, that's their equipment cost. It costs even more to install the chargers, because permits and laying high power lines integrated into the grid.

-Crissa

Source of my information
https://electrek.co/2022/04/15/tesla-cost-deploy-superchargers-revealed-one-fifth-competition/

 

[HaulingAss]

...Well, then you admit you're incorrect about chargers for batteries as large as EVs. Because you weren't looking at EV chargers.

No, I don't admit that. Most of the charging losses are due to the fact that the AC line voltage must be converted to DC charging voltage, and this doesn't change when the products are scaled for larger batteries. The principle is that the equipment is designed to handle a certain amount of current and when you use the equipment at 50% or less of its rated capacity, the efficiency drops off rather sharply. It's always best to run the equipment near it's designed power capacity.

Here's one example of the efficiency graph of an AC/DC converter used in the on-board charger of EV's:

Product brief continuous conduction mofr PFC ICs (infineon.com)

You will find the same kind of efficiency fall off at lower currents on the on-board AC to DC converters in all EV's. Infineon has some of the best, they are designed to reduce this falloff to increase efficiencies at low currents but none of them eliminate it.

You will find that all electrical conversion equipment has this efficiency falloff at low power levels, including inverters that convert DC to AC. It's unavoidable and why I always recommend that EV's are charged using power levels in the top 50% of their design limits.

When you charge one of the old Model S's equipped with dual chargers at 40 amps, it applies all the power to one of the chargers in order to maximize efficiency. Running both of them at half power would reduce efficiency.

 

[Crissa]

Source of my information
https://electrek.co/2022/04/15/tesla-cost-deploy-superchargers-revealed-one-fifth-competition/

Yes. It doesn't disagree with me?

-Crissa

 

[Crissa]

No, I don't admit that. Most of the charging losses are due to the fact that...

...You don't know how EV chargers work, again.

The way that EV chargers are able to limit their current pull to comply with the EVSE is that the EV charger is a stack of smaller chargers that it uses only as many as the EVSE allows.

This is how the DC chargers work, too, they only use as many of these sub-units as the car requests a need for, so they don't blow up the traction battery which might be all sorts of sizes.

Small device chargers are often more inefficient because they have more overhead and the waste isn't likely to be noticed in weight, bulk, or power, because they're small devices. But once you're charging some as big a even a motorcycle, it starts to matter. And the need to work with multiple EVSE power levels encourages this stacked design.

Geez, man, let go. You're wrong, it's okay, it happens.

-Crissa

 

[HaulingAss]

...You don't know how EV chargers work, again.

The way that EV chargers are able to limit their current pull to comply with the EVSE is that the EV charger is a stack of smaller chargers that it uses only as many as the EVSE allows.

This is how the DC chargers work, too, they only use as many of these sub-units as the car requests a need for, so they don't blow up the traction battery which might be all sorts of sizes.

Small device chargers are often more inefficient because they have more overhead and the waste isn't likely to be noticed in weight, bulk, or power, because they're small devices. But once you're charging some as big a even a motorcycle, it starts to matter. And the need to work with multiple EVSE power levels encourages this stacked design.

Geez, man, let go. You're wrong, it's okay, it happens.

-Crissa

OK, well that's good to know.

So how many "stacked" chargers does a Long Range Model 3 or Model Y have?

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