Is it just me, or is the power trace on that portal lagging by several hours right now? I seem to always get a real time figure for PV currently being generated and current SOC, and that is in the ballpark of what I can verify, but everything else... forget it.

Any time I check my inverter, the wi-fi light is burning nice and steady.

If you are referring to the graph, mine flat lined at 12:55 wifi also fine. Thanks for pointing it out.  The reported PV generation for th day seems acceptable for a cloudy/sunny day. 

It's working properly again today, and there seems to be no loss of data

I find the SEMS Portal to be getting slower by the day. At one stage I had David, the local support guy, change my update time from 30 to 10 seconds, but it seems to only update every 60 seconds now. I use CEF's brilliant monitoring tool when at home, but when travelling I have to rely upon the SEMS Portal. Wish there was a reliable alternative.