Question about the Powershare/UWC bundle and Daisy Chaining

[rjmcinnis]

I just bought a CT this weekend, and certainly see the appeal of the Powershare feature. I have question about Daisy Chaining two UWCs together.

I already have 1 UWC installed for my M3P. It runs from the power panel to the middle garage stall. I want to add another UWC for the CT.
The CT parks in the third stall, farthest from the power panel. So I am thinking about Daisy Chaining to my original UWC, not too concerned about full speed charging both vehicles at the same time.

What I haven't been able to find info on, is can the CT use the end UWC on a daisy chain to provide Powershare capability to the home? Has anybody here set up or tried that? My thought is that since the chargers can talk to each other to split power, they should be able to turn the primary charging off to prevent overload back to the panel? But I'm not sure if that use case was even considered?

Thanks in advance!

(Note: Yes, I have 2 powerpanels - 200a each. That's a different problem to solve later lol)

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[Loudness]

As far as I know, you can't reliably do this. I've had PowerShare with my Cybertruck since summer 2024, and last month added a 2026 Model Y. I had to have a separate circuit run for the second UWC in the garage.

Group power management is required for the two UWC to communicate over wifi, but it can apparently interfere with the hardwired connection to the gateway. This thread has a lot more info and some experiences of other members: https://www.cybertruckownersclub.co...sal-wall-connector-chargers.21452/post-374342

 

[LeeS]

If you've got a M3P, a CB, a 3 stall garage, and 400A service... then pay the electrician to direct wire the UWC2 to the gateway and not daisy chain it.

 

[rjmcinnis]

If you've got a M3P, a CB, a 3 stall garage, and 400A service... then pay the electrician to direct wire the UWC2 to the gateway and not daisy chain it.

Hmmm. Not sure what you are trying to imply? Don't find this to be particularly helpful to the question I asked, but "thanks" I guess?

 

[rjmcinnis]

As far as I know, you can't reliably do this. I've had PowerShare with my Cybertruck since summer 2024, and last month added a 2026 Model Y. I had to have a separate circuit run for the second UWC in the garage.

Group power management is required for the two UWC to communicate over wifi, but it can apparently interfere with the hardwired connection to the gateway. This thread has a lot more info and some experiences of other members: https://www.cybertruckownersclub.co...sal-wall-connector-chargers.21452/post-374342

Thanks, reading through that now, plus a couple of related threads that show at the bottom of that one. Doesn't look like it can work that way, at least not anytime soon. Was hoping it would work, and I could see how useful it is before determining if I want to get solar and PWs, without wasting too much money.

 

[LeeS]

Hmmm. Not sure what you are trying to imply? Don't find this to be particularly helpful to the question I asked, but "thanks" I guess?

I'm saying that the cost savings of the extra run/breaker you'd need to install instead of just daisy chaining it to the existing WC would not be worth it, to someone with enough resources for that combination of products.

Basically, you clearly have a nice big modern house (400A service), the top model of the model 3, the +$20k extra CB, so saving ~$500 by just running WC2 to WC1 isn't worth losing out on full power parallel charging and powershare that you'd get by wiring WC2 directly to your gateway independently of WC1.

 

[rjmcinnis]

I'm saying that the cost savings of the extra run/breaker you'd need to install instead of just daisy chaining it to the existing WC would not be worth it, to someone with enough resources for that combination of products.

Basically, you clearly have a nice big modern house (400A service), the top model of the model 3, the +$20k extra CB, so saving ~$500 by just running WC2 to WC1 isn't worth losing out on full power parallel charging and powershare that you'd get by wiring WC2 directly to your gateway independently of WC1.

Ah, I see then. Charging at the same time is really of no importance to me, at least right now. I actually have a NEMA 14-50 right next to UWC1 (on it's own breaker) that I could use if I wanted to charge both faster at no additional cost, I just don't want to deal with moving the cable when my wife gets home.

And I'm completely comfortable running conduit and adding the daisy chained UWC myself, but not so much if it involves opening the electrical panel itself.

Also, it's not a matter of having the money to spend, it's spending money wisely.

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