I’ll give my verdict first – a complete waste of time and money.
Yes, it’s a while since I purchased this thing and I’ve already referred to ‘Home Assistant’ – which if it was human, would have been dismissed forthwith.
So latterly I installed it. The first ‘hurdle’ is the so-called ‘User Manual’. I had to use a head-band magnifier to read it.
The 2nd ‘hurdle’ the connection diagram IS INCORRECT. Below a photo demonstrating both the almost unreadable text and the INCORRECT CONNECTION DIAGRAM. I’ve also laid an SD Card holder, to give an idea of scale.
Clicking on a photo DOES allow reading of the text due to the High-def pic taken with my old, but loved Agfa DC2030r 12 Megapixel camera.

Following this diagram will result in NO READINGS OTHER THAN ZERO.
Not surprising really, because the CT transformer needs to ENCLOSE ONLY ONE LEG OF THE MAINS SUPPLY, NOT TWO.
My photo below shows the CORRECT CONNECTION – only the ‘L’ leg of the supply going through the CT core.

On the left, is shown only the ‘L’ (Black in Portugal) leg of the mains connection inserted through the CT Transformer.

There are one or two conclusions that can be drawn from this experience.
NO-ONE has attempted to carry out the instructions provided. Primarily, because these are unreadable, and secondly it simply doesn’t work as stated.
This is so typical of the complete shit emanating from China.
Full of promise, complete failure to deliver.
‘Box-shifters’ like Robert Mauser here in Portugal, obviously trust the ‘CE’ given on these products, which are certified as such by the original supplier themselves. To me, ‘CE‘ inevitably signifies COMPLETE EXCREMENT.

And relax..

I can read the display, but I refuse to use the ‘Home Assistant’ crap. Instead I will use the device readings to calibrate my own design, which will be documented later in Tabuascasa