andrewNZ: Haven't read the whole thread.
If it helps anyone, I have a TP Link HS100. It's on an isolated wireless network (cloud connection is not required) and connected to Openhab2. No issues at all, and much better than the ?Belkin? rebranded Orvibo S20 that bunnings was selling for a while.
Hmm, from manufacturer website, and replicated on Noel Leemings website.
Input voltage - 100 - 240VAC
Output voltage?- 100-240VAC
Maximum Load - 10A
Maximum Power - 3.68KW
Anyway, I would suggest you check out the Kogan switches mentioned earlier in the thread. Cheaper, have power monitoring and can run local as well (after ota firmware flash).

