Sunny Boy comms.

I wonder if anyone out there has any knowledge about the Bluetooth functions and the light messages on sunnyboy inverters

1 I have 2 SMA inverters the first a 3300 which I have fitted a piggyback comms board to, seems to work well and gives pretty pictures of the output on the SMA explorer software, so seems to give full output of its information.
When it has reached about 16:15 hrs is going into shutdown, the green LED is flashing all good so far. Then for the last couple of minutes the RED LED comes on then gradually fades out. Anybody else own one of these inverters? Can they confirm this is normal as it is not mentioned in the manual

2 The other inverter is a more modern version a 3000TL-20, This one comes with its own Bluetooth module incorporated This one also speaks to the SMA software on the Laptop, both inverters have the same net id. I set them to 3 and they both appear in the software as MY PLANT. This works well and sums up the output etc. However over the last week I have noticed big gaps in the day output, it missed one day completely and yesterday cut off the last hour of production. Any body any clues or is this another "normal" problem.

Note in both cases no reports of any error turns up in the relevant logs for either inverter

The actual output meters give figures that seem OK

These inverters are new to me only live since 12 December so not much history to go on

If anyone can shed any light on these issues much appreciated.

car-mark