I’m afraid that doesn’t help. The real question is, where are those cables I referred to earlier going - the two cables (they look like 16 mm², slightly thinner than the ones going into the bottom of the consumer unit) that come out of the Henley blocks and up the left-hand side of the consumer unit.
I hope those are from the PV, but it’s by no means clear. If they are not, do you have any idea where they are going? Is there another consumer unit, or something like that, anywhere?
If we cannot identify the PV feed, the alternative is to measure the house consumption and the grid power, then the PV contribution must be the difference between the two. That makes the installation neither a “Type 1” nor a “Type 2” installation (https://guide.openenergymonitor.org/applications/solar-pv/#sensor-installation), which means the software may need a small adjustment.
So to the original question:
If you go down the emonCMS/emonPi route, I think you need only one emonPi, two c.t’s, an a.c. adapter and of course a 5 V d.c. power supply. You’ll need a double 13 A socket fitted close by.
Alternatively, if you want to avoid emonCMS and use another dashboard/database, then you want an emonTx with the ESP8266 WiFi module. You’ll still need the c.t’s, a.c. adapter and d.c power supply. The emonTx gives you the opportunity to monitor two more circuits (or groups of circuits) - provided of course there’s room inside the consumer unit for the c.t’s, and that could be a problem.