look all so to some device from homewizzard (Eatron)
They have 1 fase or 3 fase din rail mounted power and have a App in Homey
Link to the App : [APP][Pro] Homewizard 🧙♂️
Link to the module
1 fase
3fase
The device off Homewizard or rebranded from Eatron, so if you find these in your country then you can all so use these
These one have power, meeting, voltage, Amp, totall.
You could starting with one main (3fase) between your Grid and your power board
And then later expand to a few groups in your hous you want to monitor
