I work in a hospital in Mulanje (Malawi). We have recently connected 6 Quattro (6x15kW) with 6 Fronius Symo (6x15kW) AC-coupled. We have 6 battery banks (29 batteries in total). Each bank has a BMV and battery capacity of 500Ah (5x100Ah). 1 bank is different with 400Ah (4x100Ah). It is in Malawi not allowed to feed back to the grid. The system is running pretty good but we are dealing with the next issue.
When there is not enough solarpower to provide the load of the hospital and to charge the batteries the system is not using the grid to charge the batteries. For example we have a powercut and the batteries will be discharged until 8% and the powercut is over it will not start charging the batteries from the grid to the minimum SOC set in the ESS. Also not when i enable the setting 'keep battery charged'. Only when there is enough solarpower it will use the batteries to store the load. what can i do to change this? See pictures for more info. Thanks in advance.