@tbowmo They claim the meters can be connected to existing systems.
It would make no business sense to go to a secret protocol; no way would any plant accept to have to replace existing control systems.

I'd like to measure the power usage of dryer, washer, freezer etc at the meter box.
I already have a modbus meter for the heat, but have no room at the fusebox for an extra meter for each fuse "channel".

Is there a unit which can be placed inside the fusebox and take one and more current transformers, and talking modbus or wifi?