Self install Harvi and CT clamp to add missing "consumed" data on MyEnergi?

Why would you need a second CT?

You should have one CT on the mains incoming. That reads which direction and how much power you are consuming / exporting.

You don't need a CT to the Eddi and to the Hub. You just need a CT going to the Hub.

The system just needs to see power going to or from your home. If it sees export it should push the Eddi into action.

That green leaf will show values once you are using solar power to heat water.

I think you don't understand how the system works - or you're explaining what you have badly.

A Harvi is a wireless CT. You already have one if you have an Eddi and a hub. Otherwise your myenergi app wouldn't see anything.

The relays in the Eddi have nothing to do with Harvi's nor with CT clamps. They are for switching things like solenoid valves etc.

Nope, sorry. That's wrong.

The Eddi doesn't need to see solar generation. It just needs to see power export. Once it sees power export it switches on the immersion heater(s) until it sees export stopped.

All you need (and I have this) is a Harvi CT clamp on the main power line (usually in the Meter box outside your house).

From that, the Eddi can see if you are importing or exporting power. Once it sees export it will switch on and heat your hot water.

You will have another CT clamp for the Solar inverter.

I'm not sure what the value would be in having the Eddi 'seeing' another CT clamp and where would that CT clamp actually be?

EDIT:

Ok, I've gone out and looked at my Eddi. I see you can connect in extra CT clamps. I guess what you want to do is to connect a CT Clamp on the AC line from the inverter?

I guess it will give you a pretty graphic on the myenergi app but it has no practical use that I can see.

It would be pretty easy to do, if you have some clue how to work safely in Low voltage AC. You just need a CT clamp, install on the AC line from the inverter and wire it into the Eddi. Then set the correct option in the Eddi to tell it what the CT Clamp is reporting.

I did similar. It’s very easy to do. Added a harvi and put a ct on cable from the solar inverter. I added a second ct on separate battery inverter. It logs solar fine which is great but can only see battery in the graphic. Myenergi won’t store stats for non myenergi devices

My inverters go back to a small CU in my shed so it’s on the cable off the rcbo in that unit.
the middle circle is just a percentage. When you add the solar ct it adds a new icon for the panels

Ct just needs to go somewhere on the live in or out of the solar rcbo. If the ct clamp in there is going back to the eddi through the cat 5 then there should be spare wires in that you can use to also connect new ct to eddi