Also please point me at the process for getting an approved unit registered/connected.
There are a few lively threads on these forums but no definitive answer (that I could find) on the white listed CAD devices and connection process.
Best answer by Tim_OVO
Updated on 26/11/20: Our current stance on this is that it might be possible to connect third party In Home Displays (IHDs) to the Home Area Network of your smart meters, but this is not assured, and we would be limited in the support we could offer for these devices.
Instead we would recommend you get one of the OVO supported IHDs, which are currently the Chameleon IHD6. These are free and are usually provided by the engineer when they fit your smart meter.
If you don’t have one, you’re able to request that one of these via our Support team here.