Tesla Powerwall+

[wwhitney]

In case it is of interest, a spec sheet for a new Tesla product called Powerwall+ has surfaced here:

https://www.reddit.com/r/TeslaSolar/comments/n1ex3o

Looks like they've taken a Powerwall and paired it with a Gateway-replacement that includes a PV inverter. Note also the photo shows a meter adapter between the meter base and meter, with a small flex conduit connecting it to the Gateway-replacement. I infer that is the Microgrid Interconnect Device.

Given the pictured conduit connections, the question arises as to how they are complying with the bus protection rules on the service panel. Since the spec sheet lists different output currents for on-grid and off-grid conditions, perhaps they are limiting the joint inverter output current to 32A while on grid to allow for use of the 120% rule with 200A service panels. Alternatively, the device may be monitoring the service conductor currents and limiting the total current to the main panel bus to not exceed its rating, per 2020 NEC 705.13.

Cheers, Wayne

 

[jaggedben]

Interesting. I don't infer what you do from the picture. The cable between the meter adapter and Powerwall doesn't look bigger than a comms cable. So I infer that the meter adapter is simply a whole house consumption meter. Consequently, I don't see a micro-grid interconnect device in the picture. The pictured components simply allow you to 'self supply'. IOW, I see a solar inverter that is closely integrated with the Powerwall and not much else.

This would accord with certain tweets and headlines lately. See for example https://www.theverge.com/platform/amp/2021/4/22/22397163/tesla-solar-panels-roof-bundle-powerwall

 

[wwhitney]

Interesting. I don't infer what you do from the picture. The cable between the meter adapter and Powerwall doesn't look bigger than a comms cable. So I infer that the meter adapter is simply a whole house consumption meter.

But how much power does it take to actuate a 200A relay? I would think it would be no problem to fit that in the cable between the meter adapter and the PW+ solar section. No house power has to flow over that cable.

Cheers, Wayne

 

[jaggedben]

But how much power does it take to actuate a 200A relay? I would think it would be no problem to fit that in the cable between the meter adapter and the PW+ solar section. No house power has to flow over that cable.

Cheers, Wayne

Aha, didn't think of that possibility. You may be right.