Hello, there. I am new here, just got a PV system installed on my house lost in the mountains with 20 Shutten Solar panels 410 Wc, a Fronius Symo 8.2-3 (3 phases), a Fronius Smart Meter 65A-3 (for zero injection, that's a long story with my utility provider...), 3 Quattros 48/5000/70, 4 LiFePO4 batteries 25.6V/200Ah, and a back- up generator. System management is through a Cerbo GX 3 and a BMV700. I think the installer did a good job, but let me fend for myself to configure the system...
On the + side: the system works well for direct consumption by the house, with the solar panels production matching the requested loads, and the zero injection works. I also was able to get batteries to discharge at night by selecting ESS mode as "optimized without batterielife" (with a SOC limited at 65%). For some reason, the actual SOC limit on the mode "optimized with batterielife" is stuck at 80%, hence allowing for little discharging at best.
On the - side: I cannot get the batteries to charge automatically during sunny hours, even when the house loads are very small (say 400 W) and the solar panels could produce 2,000 to 3,000 W minimum. Instead, the solar panels keep production at around 600 W. Please note that if I schedule a charge through the sunny hours, the batteries will charge to 100%, but the charge is done at 100 A throughout the process, and thus it ends up using a lot of power from the grid.
I have tried many things to correct that, including checking on software versions (except the Quattros, but I have ordered a MK3 USB connector to look into this, and the Fronius, on which, as a user, I can't seem to be able to access the parameters), change of parameters following a lot of reading on the forum and manuals...
I include below a few shots from the Cerbo Touch. At the time I took them, it was bright sun shine and the panels could have produced close to 4 000 W, but they were stuck at 600 W.... Would anyone have a suggestion on how to resolve this? Let me know if you need additional information, I would do my best to find it...