Home charging Cybertruck using Tesla Mobile Wall connector?

[cgladue]

Also if you have a 14-50 Socket there is a finite number of plug and unplug cycles before the contacts inside start to not seat as tightly and the risk of heat buildup increases. yea not everyone often or ever unplugs the "charger" often but some do and sockets do wear out eventually. just something to keep in your mind when weighing hardwired or socket option

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[Woodrick]

Just a FYI on the 110v charging speed via the mobile connector adds a max +3 kw per hour (because I did not have a NEMA 14-50 when I got my Cybertruck), it takes a long time to charge a 123 kw battery. The Tesla Universal Wall Charger adds +11 kw per hour, which works out to approximately 28 miles per hour added via the Tesla Universal Wall Charger. If you plug into the normal 110v with the mobile charger you will get about 7 miles added per hour.

I believe that you mean max +3 miles/hr, not kW/hr. The 120V @15A adapter can only provide 1.4 kW/hr

Your last sentence doesn't seem to say the same number as your first.

 

[Woodrick]

The Wall Connector and the Universal Wall Connector charge at 48 amps, 16 amps difference. That means the Wall Connector will charge 50% faster than the 32 amps of the Mobile Connector, the difference is huge. I know because we have both Wall Connectors and 40 amp Gen 1 and 32 amp Gen 2 Mobile Connectors on a NEMA 14-50 outlet. The Wall Connectors are the way to go, especially for a vehicle like the Cybertruck with a 123 kWh battery.

Even charging our Model 3's, when I have to use the NEMA 14-50 outlet, I only use the Gen 1 Mobile Connector because the 40 amps of charge current is quite a bit faster than the 32 amps from the current Mobile Connector. And they only have 75 kWh batteries. The difference shows up even more when the mercury drops below freezing because the battery may need to be warmed before charging and the extra power just makes everything go more quickly.

Often, time is not of the essence but, when it is, more power equates to less stress. Having more power is especially nice because it facilitates only charging to 60-70% for battery longevity while remaining confident I can quickly throw another 20% if the need arises for a longer than expected trip and I can do it while I get ready to leave.

There is never any downside to having more power than you need, in fact, the larger copper conductors and lower resistance of a Wall Connector vs. a Mobile Connector will be slightly more efficient, especially since the car can go into sleep mode only after it reaches the set stage of charge. The longer it takes to charge, the more energy is wasted keeping the BMS and other systems awake.

I've explained all this to you multiple times but you continue to advocate for wimpy charging solutions (relative to the energy needs of a Cybertruck) that will complicate matters if a family adds another EV and wants to share charging infrastructure.

Sure, if the available spare power is limited without an expensive electrical service upgrade, then go cheap, just know that it will be inferior to a more versatile, higher-powered system.

It's amazing all the useless information that you listed, but didn't address my point. What is the time difference? Does it matter?


"more power equals less stress"? You know you pulled that one out of thin air.
"mercury drops below freezing" Only if you leave the vehicle outside, most who install chargers live inside. OP was from Houston, not really known for that much freezing.
"larger copper conductors" Nop, P=VI gives you the same loss over time, not matter what the current is. But I will give you a point on faster to sleep.

But that brings us back to my point.

What is the realistic difference in time to charge. Don't come back with a 123kWH calculation, because no one charges 0-100% on a daily (if ever basis).

 

[Carlos Thomas]

I believe that you mean max +3 miles/hr, not kW/hr. The 120V @15A adapter can only provide 1.4 kW/hr

Your last sentence doesn't seem to say the same number as your first.

Yes, I believe you are right.

 

[HaulingAss]

It's amazing all the useless information that you listed, but didn't address my point. What is the time difference? Does it matter?


"more power equals less stress"? You know you pulled that one out of thin air.
"mercury drops below freezing" Only if you leave the vehicle outside, most who install chargers live inside. OP was from Houston, not really known for that much freezing.
"larger copper conductors" Nop, P=VI gives you the same loss over time, not matter what the current is. But I will give you a point on faster to sleep.

But that brings us back to my point.

What is the realistic difference in time to charge. Don't come back with a 123kWH calculation, because no one charges 0-100% on a daily (if ever basis).

You completely ignored my point about having higher charging power reducing the need to charge as high, prolonging the life of the battery. Battery management is just easier when you can top off quickly.

You need 74 kWh to go from 20% to 80% in a Cybertruck, not subtracting 5-10% for inefficiencies, so call it 80 kWh. At only 32 amps, that will take ten and a half hours, assuming no energy used to heat the battery. If you have the full 48 amps available, that shortens to only seven and a half hours. For people who might arrive home at 9 pm and who want to leave at 6 am with 80% that will make a big difference in being able to do that. What if you arrive home from the big city at midnight and have a full day following? With only 32 amps you are out of luck; you will be stopping at a Supercharger to fill up on electrons costing twice as much to four times as much!

If the next day is a "big mile" day, you might want to charge past 80%. So, add an hour and 45 miniutes longer for every 10% of the battery you want to fill, assuming you only have 32 amps available. It's not all that uncommon that I fill my Model 3 to 90% or higher when leaving town. If I arrived home after dinner in the Cybertruck, 32 amps is not enough to get it where I want it to be before I leave in the morning.

But there is another consideration. The Cybertruck might be put into duty to rescue charge an EV that went flat somewhere, or it might be used in the field or jobsite to power a pump, welder, air conditioner, lighting, music system, etc. Any of these uses would use more of the battery than typical driving. This is one more use case where having more power available makes the truck a more capable power source in the field. Because it can filled up faster from a Level 2 charger.

All of three of our vehicles are charged outside, 100% of the time. Both at home (under a carport) and at our vacation cabin (in the driveway). I see a lot of outside charging around here. Yes, cold weather greatly increases the charging requirements, both in higher driving consumption and in the need to heat the battery.

In six years of only driving electric cars (our F-150 is rarely used), we have been grateful for the faster charging speeds when using 48 amps on our Model 3s many times. And the Cybertruck will be even more so, with the higher consumption per mile and a 123 kWh battery vs. a 75 kWh battery (and the ability to use that battery to power other things).

Did I answer all your questions? I'm not sure why you push back so hard on my recommendation to install charging equipment that can take advantage of the full 48 amps the Cybertruck can accept. Who wouldn't want this extra functionality? Also, if you ever want to charge two EV's with one Wall Connector, you will be especially thankful for the additional charging speed. There is no downside to having more power than you need 90% of the time and you will be very grateful for it in the remaining situations. Of course, some people have very low demands, due to lifestyle. For them, it would take a very special situation to stress their time constraints. But many of us are much busier and have unexpected things come up on a regular basis.

One last correction, my comment about the bigger copper giving lower losses to resistance is because you don't have to charge at the maximum rating of the circuit when you have 48 amps available. The larger conductors, charging at only 32 amps will have lower losses to resistance than a circuit designed for less power. Yes, it will save electricity and the cumulative amount of additional consumption nationwide, if everyone took your advice to use a NEMA 14-50 would be astronomical, once everyone is driving EVs.

 

[Woodrick]

You completely ignored my point about having higher charging power reducing the need to charge as high, prolonging the life of the battery. Battery management is just easier when you can top off quickly.

You need 74 kWh to go from 20% to 80% in a Cybertruck, not subtracting 5-10% for inefficiencies, so call it 80 kWh. At only 32 amps, that will take ten and a half hours, assuming no energy used to heat the battery. If you have the full 48 amps available, that shortens to only seven and a half hours. For people who might arrive home at 9 pm and who want to leave at 6 am with 80% that will make a big difference in being able to do that. What if you arrive home from the big city at midnight and have a full day following? With only 32 amps you are out of luck; you will be stopping at a Supercharger to fill up on electrons costing twice as much to four times as much!

If the next day is a "big mile" day, you might want to charge past 80%. So, add an hour and 45 miniutes longer for every 10% of the battery you want to fill, assuming you only have 32 amps available. It's not all that uncommon that I fill my Model 3 to 90% or higher when leaving town. If I arrived home after dinner in the Cybertruck, 32 amps is not enough to get it where I want it to be before I leave in the morning.

But there is another consideration. The Cybertruck might be put into duty to rescue charge an EV that went flat somewhere, or it might be used in the field or jobsite to power a pump, welder, air conditioner, lighting, music system, etc. Any of these uses would use more of the battery than typical driving. This is one more use case where having more power available makes the truck a more capable power source in the field. Because it can filled up faster from a Level 2 charger.

All of three of our vehicles are charged outside, 100% of the time. Both at home (under a carport) and at our vacation cabin (in the driveway). I see a lot of outside charging around here. Yes, cold weather greatly increases the charging requirements, both in higher driving consumption and in the need to heat the battery.

In six years of only driving electric cars (our F-150 is rarely used), we have been grateful for the faster charging speeds when using 48 amps on our Model 3s many times. And the Cybertruck will be even more so, with the higher consumption per mile and a 123 kWh battery vs. a 75 kWh battery (and the ability to use that battery to power other things).

Did I answer all your questions? I'm not sure why you push back so hard on my recommendation to install charging equipment that can take advantage of the full 48 amps the Cybertruck can accept. Who wouldn't want this extra functionality? Also, if you ever want to charge two EV's with one Wall Connector, you will be especially thankful for the additional charging speed. There is no downside to having more power than you need 90% of the time and you will be very grateful for it in the remaining situations. Of course, some people have very low demands, due to lifestyle. For them, it would take a very special situation to stress their time constraints. But many of us are much busier and have unexpected things come up on a regular basis.

One last correction, my comment about the bigger copper giving lower losses to resistance is because you don't have to charge at the maximum rating of the circuit when you have 48 amps available. The larger conductors, charging at only 32 amps will have lower losses to resistance than a circuit designed for less power. Yes, it will save electricity and the cumulative amount of additional consumption nationwide, if everyone took your advice to use a NEMA 14-50 would be astronomical, once everyone is driving EVs.

I told you not to do the 0-100% thing, but indeed you effectively did. People just don't normally have to do 20-80%. And then you go with the max charge two days in a row. The probabilities of this happening is 0%. While there may be a few people that have done that, over the fleet, it's a really small number.

Cybertruck may be put into rescue duty? ROTLMAO. In that case you should always charge to 100%. That's definitely a made-up situation.


I've been fully electric for about 8 years now. I had one of the infamous 88-mile range Leafs as well as one of the ~150 mile Leafs.

For the last nearly 3 years, I've charged BOTH of my Teslas by alternating access to a single 120V 15A plug.

As much as you say that everyone has to have the fastest charging solution, I'm here to say that everyone doesn't need it.

Sure, the Cybertruck is going to make charging off of a 120V 15A circuit a little less feasible, if just depends on the use cases. Most people drive way less than 50 miles per day.

 

[schmo]

Posted this in another thread... https://www.cybertruckownersclub.com/forum/threads/charging-the-cybertruck-at-home.12940/post-263629

But is this to say I should keep my old MS mobile connector that can do 40A (off a 50A breaker) to get faster charge speeds for my CT?

That's what I did. I swapped mobile connectors with my old Model S. Works great.

 

[HaulingAss]

I told you not to do the 0-100% thing, but indeed you effectively did. People just don't normally have to do 20-80%. And then you go with the max charge two days in a row. The probabilities of this happening is 0%. While there may be a few people that have done that, over the fleet, it's a really small number.

Cybertruck may be put into rescue duty? ROTLMAO. In that case you should always charge to 100%. That's definitely a made-up situation.


I've been fully electric for about 8 years now. I had one of the infamous 88-mile range Leafs as well as one of the ~150 mile Leafs.

For the last nearly 3 years, I've charged BOTH of my Teslas by alternating access to a single 120V 15A plug.

As much as you say that everyone has to have the fastest charging solution, I'm here to say that everyone doesn't need it.

Sure, the Cybertruck is going to make charging off of a 120V 15A circuit a little less feasible, if just depends on the use cases. Most people drive way less than 50 miles per day.

You didn't read very carefully before spouting off. I didn't present any 0-100% scenarios. In fact, your recommended 32 amps of maximum charging power couldn't even handle the 20-80% scenario I presented. I'm just trying to keep you from misleading people who might occasionally need more charging power available.

You have a lot of faulty arguments; one is that I suggested everyone absolutely needed more than 32 amps. I actually said that not everyone will need more but that you should plan for your heaviest use case, not your daily average. You don't need more until you do. Some people live sedentary lives and will NEVER need more than a regular 120V outlet can provide. But that's highly unusual.

As far as charging two Tesla from one 15-amp 120V plug, good for you, but all that shows is that you don't have typical needs and you live in a warm/hot muggy climate. I find your advice to people who are new to the world of EVs dangerously self-centered and misleading. Many people would be ready to go back to ICE if all they had was a single regular wall outlet for one EV, let alone two!

I live in a relatively mild coastal climate and one regular wall outlet failed miserably for me in Tesla's most efficient car, the Model 3. There simply wasn't enough juice available for one car, let alone two! This caused major stress and life disruption. The point is, when installing a charge solution, you want to plan for your worst use case, not your daily average. This increases convenience and reduces stress, it makes the EV more capable, more useful, more valuable. We don't use our EVs as backup cars, town cars or secondary cars to an ICE vehicle. They are the cars we do everything with. And you want enough power to do that without any limitations imposed by your chosen charging solution.

Please stop misleading those who are new to EVs, especially ones that live in climates with 4 seasons and who actually sometimes have big driving days. Yes, I do charge occasionally to 100% because some days have much higher driving needs, Tesla would have made the top of the battery off-limits if it were not useful. I also occasionally arrive home with only between 5-10% battery range remaining, just as I planned it. But none of the use scenarios I presented in my previous post required going below 20% or above 90% state of charge. So, stop it with the false claims. Not everyone is you, someone who thinks driving 200-300 miles on consecutive days, or needing a 6 or 8 hour turn-around time, is something that will never happen to you. Some people get busy from time to time, don't get caught with your pants down. Plus, low powered solutions waste energy by rarely letting the EV go into the lowest power sleep states.

 

[HaulingAss]

That's what I did. I swapped mobile connectors with my old Model S. Works great.

You did this to get 8 more amps of charging power for your Cybertruck (32 amps to 40 amps)?

As long as the outlet is wired for 50 amps and is in good shape, that will work fine.

 

[Woodrick]

You don't need more until you do. Some people live sedentary lives and will NEVER need more than a regular 120V outlet can provide. But that's highly unusual.

Please stop misleading those who are new to EVs, especially ones that live in climates with 4 seasons and who actually sometimes have big driving days. Yes, I do charge occasionally to 100% because some days have much higher driving needs, Tesla would have made the top of the battery off-limits if it were not useful.

And just because you may need more than you can charge at home doesn't mean that you are out of luck. Most people live relatively close to a Supercharger now. Maybe you don't, I don't care, but that doesn't mean that you can assume that others don't

The top of the battery is not off-limits. It's just not recommended on some models to charge to 100% regularly. But I've done it twice in the last week as I was doing some longer trips in the middle of nowhere, with maybe a heavy foot. That's me in the back with some Vettes in my way.

Came home low, plugged in, it took a day or two. But always know that I've got nearby Superchargers if needed.

And you are also ignoring the fact that some people may not be able to install 50A circuits. Or that the cost of installation may be exorbitantly high. I'm giving people options. And with 120V 15A circuit able to add 60 miles (~40 on Cybertruck) in 12 hours, that does fit the requirements of most people.

 

[HaulingAss]

And just because you may need more than you can charge at home doesn't mean that you are out of luck. Most people live relatively close to a Supercharger now. Maybe you don't, I don't care, but that doesn't mean that you can assume that others don't

The top of the battery is not off-limits. It's just not recommended on some models to charge to 100% regularly. But I've done it twice in the last week as I was doing some longer trips in the middle of nowhere, with maybe a heavy foot. That's me in the back with some Vettes in my way.

Came home low, plugged in, it took a day or two. But always know that I've got nearby Superchargers if needed.

And you are also ignoring the fact that some people may not be able to install 50A circuits. Or that the cost of installation may be exorbitantly high. I'm giving people options. And with 120V 15A circuit able to add 60 miles (~40 on Cybertruck) in 12 hours, that does fit the requirements of most people.

I don't know if you are being dense on purpose, but I'm not at all ignoring that the cost to install a higher powered charging circuit varies widely with the specific situation. In fact, I said if money was an issue, and an expensive upgrade was required, sure, just throw in the minimum. But my advice is not to aim for the minimum, it's to aim for a robust charging solution that maximizes convenience in those instances when a low charge current would limit your activities. Because you will love your EV more when it doesn't impose limitations on your lifestyle.

Yes, I have 3 Superchargers near my home, and I drive by them all the time without having to stop. Because I have adequate home charging. Thankfully. My primary driver even has Free Supercharging for life and still I drive right by those local Superchargers all the time. This is another good reason why I recommend investing in a robust charge station(s). Because most people have to pay for Supercharging, and it costs 2-4X home electricity.

Having robust and efficient home charging is highly unlikely to ever not be a desirable addition to your home. I don't know why you are intent on misleading newbies and misrepresenting what I have said. Your advice is bad for the most efficient Tesla, a Model 3, and it's twice as bad for a Cybertruck.

Do you also recommend that everyone live in a 800 sq. foot tiny home, because that's all anybody really needs, and it costs less?

 

[Gigahorse]

I don't know if you are being dense on purpose, but I'm not at all ignoring that the cost to install a higher powered charging circuit varies widely with the specific situation. In fact, I said if money was an issue, and an expensive upgrade was required, sure, just throw in the minimum. But my advice is not to aim for the minimum, it's to aim for a robust charging solution that maximizes convenience in those instances when a low charge current would limit your activities. Because you will love your EV more when it doesn't impose limitations on your lifestyle.

Yes, I have 3 Superchargers near my home, and I drive by them all the time without having to stop. Because I have adequate home charging. Thankfully. My primary driver even has Free Supercharging for life and still I drive right by those local Superchargers all the time. This is another good reason why I recommend investing in a robust charge station(s). Because most people have to pay for Supercharging, and it costs 2-4X home electricity.

Having robust and efficient home charging is highly unlikely to ever not be a desirable addition to your home. I don't know why you are intent on misleading newbies and misrepresenting what I have said. Your advice is bad for the most efficient Tesla, a Model 3, and it's twice as bad for a Cybertruck.

Do you also recommend that everyone live in a 800 sq. foot tiny home, because that's all anybody really needs, and it costs less?

Had a similar reply queued up......... but saw yours and it is pretty much my exact thoughts, just worded much more diplomatically.

 

[Woodrick]

I don't know if you are being dense on purpose, but I'm not at all ignoring that the cost to install a higher powered charging circuit varies widely with the specific situation. In fact, I said if money was an issue, and an expensive upgrade was required, sure, just throw in the minimum. But my advice is not to aim for the minimum, it's to aim for a robust charging solution that maximizes convenience in those instances when a low charge current would limit your activities. Because you will love your EV more when it doesn't impose limitations on your lifestyle.

Yes, I have 3 Superchargers near my home, and I drive by them all the time without having to stop. Because I have adequate home charging. Thankfully. My primary driver even has Free Supercharging for life and still I drive right by those local Superchargers all the time. This is another good reason why I recommend investing in a robust charge station(s). Because most people have to pay for Supercharging, and it costs 2-4X home electricity.

Having robust and efficient home charging is highly unlikely to ever not be a desirable addition to your home. I don't know why you are intent on misleading newbies and misrepresenting what I have said. Your advice is bad for the most efficient Tesla, a Model 3, and it's twice as bad for a Cybertruck.

Do you also recommend that everyone live in a 800 sq. foot tiny home, because that's all anybody really needs, and it costs less?

I'm not being dense, it's you that is basically saying go big or don't go EV. Pretty sure that it was you that was suggesting how stupid it was to use a Mobile connector to charge instead of going big and maxing out a wall connector.

My point, they are all suitable for use. You don't have to go big, you can go small. Whatever floats your boat. The big thing is to charge at home and go EV.

Too many people read the forum and posts like yours and think that installing a 50A circuit is the ONLY answer.

 

[HaulingAss]

I'm not being dense, it's you that is basically saying go big or don't go EV. Pretty sure that it was you that was suggesting how stupid it was to use a Mobile connector to charge instead of going big and maxing out a wall connector.

My point, they are all suitable for use. You don't have to go big, you can go small. Whatever floats your boat. The big thing is to charge at home and go EV.

Too many people read the forum and posts like yours and think that installing a 50A circuit is the ONLY answer.

People with normal reading comprehension will not interpret my advice to mean "Go big or don't go EV". I never said anything like that and I literally ended my post with this finale:

"Sure, if the available spare power is limited without an expensive electrical service upgrade, then go cheap, just know that it will be inferior to a more versatile, higher-powered system."

You continue to repeatedly mischaracterize what I've said in an effort to make yourself sound reasonable and a weak attempt to make me sound unreasonable. But most people can understand English well enough to see your under-handed attempts to misrepresent the narrative.

Why do you feel the need to do that?

 

[DrShah]

if you have the 60amp breaker why not just get a wall connector and hard wire it and call it a day, you will get 48amps to charge with and keep the mobile connector in the truck like sane people do

Yup, I drive a 110 miles a day in MYLR … I get about “45mph” on my Wall Connector. I was planning to use that but apparently it won’t support Powershare and I need to get their new Universal Charger to do that??

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