Multiple wall connectors

[igs]

What size panel do I need to install 2 wall connectors? Will adding a sub panel work?

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[cybercoffee]

maybe someone more knowledgeable will chime in but I believe a single wall connector can be set as low as 15A or as high as 60A during commissioning. so if you have two circuits that would determine the breaker you need (and your panel size). is that what you're asking?

 

[mongo]

What size panel do I need to install 2 wall connectors? Will adding a sub panel work?

Wall connectors can be grouped so their combined load is limited.
https://www.tesla.com/support/charging/wall-connector/power-management

 

[Woodrick]

It depends.

But a 100A sub panel would probably be the most common choice

 

[smcnaughton829]

I have 2 Gen 3 wall connectors runing off the wireless load share.
My main wire coming out of my panel is a dual 60amp breaker going into my sub panel in my garage. This is then split with 2 dual 60 amp breakers allowing a full 48 amp to each Gen 3 if charging by itself.
When both are charging they split the power to 24amps each charger. I charge at night so as one slows down it’s supposed to add more power to the other charger but never going over 48 amps combined. I have never verified this but that’s what it should do.
Yes I could have run a dual 100 amp and set the limit higher, but it was more money due to the larger main wire run.
If I had to do it again I wouldn’t change anything. It been working great for the past 3+ years.
I’m waiting for the power share to be installed and from what they are telling me it’s a swap out of one of my Gen 3 chargers for the UWC and then the gateway install.
He said that the load share will work as it did with the new charger.

 

[igs]

OK I think I understand now, was hoping to run both (or more) at full power, but residential power is limited to 200 amps (regardless of panel) and the wall connectors support power sharing.

 

[mongo]

OK I think I understand now, was hoping to run both (or more) at full power, but residential power is limited to 200 amps (regardless of panel) and the wall connectors support power sharing.

There is also dynamic power management. It might work with multiple wall connectors (each with its own current sensor). That would allow maximum power draw.
So would dynamic + group, but I'm not sure if that is supported.

 

[Guylouis]

What size panel do I need to install 2 wall connectors? Will adding a sub panel work?

It really all depends on how much space you have available in the main panel.

Ideally you want a min 200 amp service and install two dedicated 60 amp runs and breakers for the chargers

alternatively you can also install 100 amp sub panel with 2x40 amp breakers

if you’re a bit low on space and power you can install both units on the same 60 amp dedicated line and enable Load Sharing. This will automatically adjust the amperage going to each charger based on how much each charger is requesting.

This way if you have one car plugged in you can take maximum amperage and if you have both cars plugged in it will split the 60 amp

 

[RickJ19Zeta8]

OK I think I understand now, was hoping to run both (or more) at full power, but residential power is limited to 200 amps (regardless of panel) and the wall connectors support power sharing.

You can put in a 150amp sub panel. But eventually you’ll be limited by breaker loading (total breaker faceplate amperage vs service).

10 years ago, I dropped a 100amp main panel in my garage for welding for a total of 300amps residential service. It can be done depending on your utility company.

Whatever you choose to do, it’s cheaper to do it now and plan for the future right away. Costs only ever go up.

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