A common question we are asked is do I need a solar CT Clamp to use the surplus solar I have and where does it go?
So, out of the box Zappi/Eddi has a CT included, this should be placed onto the meter tails (power cable entering property). This allows Zappi/Eddi to see the import and export to the grid and act accordingly to this.
To measure the output from your PV panels you need an extra current transformer (CT) connected around the live wire on the output from the PV inverter.
This can either be wired directly back to your zappi or eddi, or you can use a harvi wireless transmitter if it makes the installation easier
As the CT may need to be fitted inside the PV inverter or your consumer unit you may want to get an electrician to fit this for you.
The PV CT is not essential - zappi and eddi use the grid CT for their control - but you do need one if you want to track your PV generation and usage in the app.
You can purchase extra CT Clamps directly from us here: https://www.myenergi.com/product/ct-clamp/