Hi, I have commisioned a new ESS system containing:
- 3x Quattro 48/15000
- 4x MPPT RS 48/200
- 1700Ah of LiFePo4 with CAN-BMS
- 2x Fronius Symo (20 + 17)
All AC-loads and PV inverters are connected on AC-out 1 and there is no Energy Meter in the system. Minimum SOC is set to 30% and AC and DC feed-in are enabled. ESS mode: Optimised without Battery Life. Of course all firmwares are up to date.
My problem is that when there is plenty of PV power available, and the batteries are at Minimum SOC after night, it feeds all the AC PV to the loads and the grid. It also limits the DC PV to around 250W and does not charge the batteries, so after all day they sit at 30% :/
Only thing that temporarly helps is to set feed-in limit to 200W, then Solar Chargers start to charge batteries.
Is it a known bug or just normal system behavior? I am looking forward to any advices.