Newbie what do In need to order?

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Hello Alfie

You can achieve the monitoring part with an EmonPi/EmonTx based monitor, the guide gives a good overview here: System Overview — OpenEnergyMonitor 0.0.1 documentation

There is also the solar PV application page here: Solar PV — OpenEnergyMonitor 0.0.1 documentation

For controling 13A sockets, the EmonPi has a piece of software installed called NodeRed which is a more advanced topic, covered a little here:
https://guide.openenergymonitor.org/integrations/nodered

Discussion on EdiMax SmartPlugs: