Two Tesla Wall Chargers Charging Model Y & R1T Simultaneously

[Tlohrenz]

A few years ago, I bought two Tesla Wall Chargers because I bought a Model Y and ordered a Cybertruck. However, the Cybertruck was taking too long and SuperChargers were now open to most CCS EV's. So I cancelled my Cybertruck and bought a Rivian R1T a couple weeks ago. I also bought a A2Z AC Adapter for my Wall Charger and a A2Z DC Adapter for Super Chargers until Rivian ships me theirs. Now the big question. Could I charge both EVs at the same time w/o overloading my 50amp breaker.

The answer is yes and it works really well. The Wall Chargers are configured as a pair and have a max amp draw of 42 amps. When both are charging, they each pull about 20 -22 amps. I played around with the model Y and reduced its draw to 15 amps. When I did this, the Rivian increased to 27 amps. I played around some more and every time, the Wall Chargers never exceeded 42 amps.

Apparently, load sharing several Wall Chargers at hotels is pretty common.

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[MidnightRivian]

Thanks for sharing your experience on load balancing / sharing.

I am interested in getting the Tesla Universal Wall Connector when it’s time to get a 2nd charger for R2 launch.

 

[VSG]

FYI you should not be pulling more than 40A continuous through that 50A breaker.

I suggest you dial your chargers down to 40 A shared.

 

[ssbmx90]

I have the universal, it’s baller

 

[Tlohrenz]

Thanks for sharing your experience on load balancing / sharing.

I am interested in getting the Tesla Universal Wall Connector when it’s time to get a 2nd charger for R2 launch.

R1's & R2 starting in 2025 will require the Tesla connector not the universal connector.

 

[MidnightRivian]

R1's & R2 starting in 2025 will require the Tesla connector not the universal connector.

I like the universal one to make sure I can easily charge any electric vehicle at my house and not have to worry about keeping track of adapters.

 

[gregeast]

R1's & R2 starting in 2025 will require the Tesla connector not the universal connector.

The beauty of the Universal Wall Connector in the current, half-pregnant changeover to NACS environment is that it has a J1772 adapter that stores in the body of the charger but the cable itself has a Tesla NACS connector. So, you can pick and choose depending on what vehicle you are charging.

 

[DiveSherpa]

I am about to put in one of these NeoCharge units and I can swap out whatever 2charger / adapters I want on the downstream side. Allows for much tuning scheduling and charge behavior.

We have the Rivian and a PHEV, so right now we are juggling cables.

No data yet about how it works since it's not installed, but I may play with it this week.
(NOT AN ENDORSEMENT YET!!!)

https://getneocharge.com/pages/smart-splitter

 

[DiveSherpa]

These are the parts that will make up our 2 car charging system. With the NeoCharge, I ( in theory) can use 2 non-smart chargers to schedule, share or stage multiple vehicles. Install should happen next week.

 

[beatle]

Watch out for that Leviton receptacle, especially if you plan on pulling 40A. I had one melt and fail completely after 28 months of use, even though my connector was semi-permanently installed with strain relief.

Leviton makes a 14-50R specifically for EV use, but it's $60-$70. vs. the typical $10 one at Home Depot. If that's the one you have though, you should be good to go.

 

[DiveSherpa]

Watch out for that Leviton receptacle, especially if you plan on pulling 40A. I had one melt and fail completely after 28 months of use, even though my connector was semi-permanently installed with strain relief.

Leviton makes a 14-50R specifically for EV use, but it's $60-$70. vs. the typical $10 one at Home Depot. If that's the one you have though, you should be good to go.

Yes, I went to the Leviton website and got the beefed up version of the outlet specifically for EV charging on consistent load.. The way you can tell is that the beefy one is that it will NOT fit the circular 14-50R cover they sell at the Big Box stores.
I ended up buying a larger box and a flat plate box cover and drilling the right sized hole and making my own mounting for it. It may exist somewhere, but it was faster to make it myself.

 

[DiveSherpa]

Final Result. I did also have to modify how the NeoCharge attached to the box. That just meant moving the holes about 1/2 inch.
All of that said. The NeoCharge works OK out of the box, but I am not 100% happy with it (yet). The software needs some work. Curious if anyone else has one to compare notes with.
I may start a new post to explore the issue.

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