Mark R

Yes- primarily for two reasons. I installed solar to mitigate my carbon footprint, intending to use as little grid as possible.
The inverter was incompatible with two US3000 Pylontech batteries - was only ever able to charge to a maximum of 32A. This led to prolonged charging times at the end of a battery cycle (which was mostly daily for half the year) during which time the inverter operated in line mode (with the panels only available for charging) until the SOC got to 60%, which was around midday. Plenty of morning grid use as a result.
This despite an initially intact BMS-inverter connection.
Had the firmware upgraded from China in about September, after which I completely lost the connection to the BMS and ran the system on voltages with worse efficiences. 
Learned a lot about solar generation during the year I had the system, and the sunsynk hits the spot. Except it is a hungrier voltage machine, so have come to the conclusion that I need to create a second string for the second MPPT which will need two more panels. Will have a go myself. 
Image attached describes the behaviour.
 

Hello everyone
Some questions and observations about the Shineserver app/web service. 
Do you have any idea how one would differentiate the daily/monthly contribution from PV directly to domestic load vs that to battery charging? Am finding the terminology in the glossary either very technical or lost in translation to English. 
I am trying to work out whether adding a 3rd Pylontech 3 kW battery would make any sense with the panel configuration (3.6 kW) I have. I have managed to fine tune the BMS/inverter settings to get to as little exclusive charging time as possible (DOD set to 22%, SOC up to 60%, only solar charge) to allow for as much panel contribution to domestic load. Rarely do I fail to complete 100% charging of the batteries although this winter in CPT has seen long wet periods. My ultimate aim is to use as little grid as possible which currently am unable to avoid after early hours of the morning until about midday.
Many thanks
Mark 
 
 

That is very helpful. Thank you.
Interestingly, the SOC was locked at 95% when in exclusive solar charge for batteries (Sol in 14) but able to be manipulated once change to CSO. Looking good so far.
Will post a picture of 24 hours of picture tomorrow. 
Still confused about why the draw from panels limited to 32A while in exclusive solar battery charging mode (Sol in 14). Any thoughts?