Very cool! Glad you got it working!
My unit is offline until I can figure a more permanent solution. Doing some electrical upgrades at the moment. When I get it permanently mounted and/or a second unit for my second panel I will share.
So sorry to find this topic so late.
Yes, WEM3080T also supports the 3-phase and split phases.
Customers can just use two of the 3phase to monitor the grid of the 110/220V or 110/208V systems that are common in North America.
Such as to use Ua-Un and Ub-Un to monitor the two phases of the grid.
There would be one phase left not used.
Before, the phase not used could only be used to monitor some special loads or just not used.
Now, there is a better usage for the phase not used.
It can be used to monitor the solar PV output.
Although the solar PV output also with two L lines, it is a balanced output, so it just needs to measure one L -N and double the measurement result will get the total output of the solar output.
like this
This is a detailed introduction to this feature
https://www.iammeter.com/newsshow/ap-dual-phase-split-phase-20231019