Peter_M
Member
The TWC doesn't use a neutral, so the white neutral wire is probably just capped with nothing connected to it.If you look closely, there's a second blue wire nut above the first with at least one green wire entering it.
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The TWC doesn't use a neutral, so the white neutral wire is probably just capped with nothing connected to it.If you look closely, there's a second blue wire nut above the first with at least one green wire entering it.
Set to 48A. It's fairly consistent behavior, it'll max out at 42A if both cars are plugged in and one car is charged. Can hit 48A if I unplug the other carWhat did you set as the maximum total current? If they share a 60A circuit, it should be 48A. It takes about 10 minutes for a single unit to ramp up to the maximum current when the other one is not charging, and even when only one is charging, the current seems to drop and come back up every half hour or so.
I think so. I remember that the J1772 communication spec has to allocate 6A as a minimum for some reason, and the Tesla connectors do it too. So you will see that, where the car that has stopped charging still seems to have 6A subtracted for it, even when it's not using it.I noticed when both cars are plugged in, the max one will pull is 42A even if the other is done charging. Is this the expected behavior?
I guess the algorithm is being extra careful not to go over the limit and maybe that's also why it ramps up slowly when it starts charging. Maybe there are scenarios where one car starts charging before the other one knows about it... In my case, the two TWCs are on separate 60A circuits and I set the limit to 60A total, 48A individually, and they get right up to 48A if the other car is plugged in but not charging. I'm using the feature just to ensure that I don't blow the main breaker on the panel.Set to 48A. It's fairly consistent behavior, it'll max out at 42A if both cars are plugged in and one car is charged. Can hit 48A if I unplug the other car
Gotcha. I have mine going to a subpanel, supplied by a 60A circuit, so I need to limit it to 48A total. Might eventually upgrade that wiring, but it'd be a bit of a pain for not a whole lot of gain.I guess the algorithm is being extra careful not to go over the limit and maybe that's also why it ramps up slowly when it starts charging. Maybe there are scenarios where one car starts charging before the other one knows about it... In my case, the two TWCs are on separate 60A circuits and I set the limit to 60A total, 48A individually, and they get right up to 48A if the other car is plugged in but not charging. I'm using the feature just to ensure that I don't blow the main breaker on the panel.
I also inferred from everything I've read that you can safely split the two HPWCs with a Polaris, then adjust accordingly in the software to say that they're sharing the same breaker/circuit.Reviving this thread as there seems to be a lot of knowledge here.
The Tesla Gen3 HPWC power sharing page now contains these two sentences (underline mine):
"By intelligently managing available power on a given circuit, power sharing allows a single electrical circuit to support multiple Gen 3 Wall Connectors while still ensuring your electric vehicles get a sufficient charge."
"Note: In the event that your leader and followers have different circuit breakers, you have to individually connect to each of the followers on different breakers via the Wi-Fi broadcast, and then set the correct breaker limit."
The installation guide doesn't appear to have been updated in a while as it still shows the two cable length options as 8.5' and 18'. Plus it references that power sharing will be available in a future software update. Would be nice if these documents had revision dates.
I spoke with my Tesla certified electrician today (who installed my existing Gen3 HPWC) and we talked through the above information. He said that there is no rational or code violation reason that I could not run two Gen3 HPWC off of a single 60amp circuit breaker connected through a Polaris connector.
Does this sound correct?
That conflicts with the installation instructions in the Gen3 wall connector product manual."Note: In the event that your leader and followers have different circuit breakers, you have to individually connect to each of the followers on different breakers via the Wi-Fi broadcast, and then set the correct breaker limit."
The installation guide doesn't appear to have been updated in a while as it still shows the two cable length options as 8.5' and 18'. Plus it references that power sharing will be available in a future software update. Would be nice if these documents had revision dates.
I spoke with my Tesla certified electrician today (who installed my existing Gen3 HPWC) and we talked through the above information. He said that there is no rational or code violation reason that I could not run two Gen3 HPWC off of a single 60amp circuit breaker connected through a Polaris connector.
Does this sound correct?
Eh? It sounds like the opposite of that to me. That page sounds like old outdated information, since it mentions Polaris connectors. Those were allowed on the Gen2, but not on the Gen3. Or I guess it could be said another way, that it mentions "if" you are using Polaris connectors, which is covering the possibility that it's talking about Gen2 wall connectors, which were allowed to do that.“That conflicts with the installation instructions in the Gen3 wall connector product manual.”
Right, that’s why I posted. It seems the website has been updated more recently than the manual.
That's how the gen 3 manual always was. The universal wall connector shows a diagram for the single branch circuitView attachment 1021183Read this thread and just figured I would update. The latest version of the Gen 3 install guide has drawings directing each of the Chargers sits on its own 60A breaker, regardless of whether a sub panel is used.
This is good news! Do you have a link to a copy of the full manual? I can't find a copy online.That's how the gen 3 manual always was. The universal wall connector shows a diagram for the single branch circuit
This is good news! Do you have a link to a copy of the full manual? I can't find a copy online.