My ESS system shuts down after approx. 10 to 15 seconds when the Grid fails and the Batteries are fully charged. The Multi and the battery was added to a standard grid connected PV system which is 10 years old. The grid configuration setting of the PV inverter has not been changed.
System components
Multiplus II 48/5000/70-50
Colour Control
Carlo Gavazzi ET112 Meter at Grid side
SMA SB5000TL-21 AC coupled on AC OUT 1; Carlo Gavazzi ET112 Meter at output side of PV Inverter
24x2V/500Ah LA Battery Bank
ESS Assistant is configured as below
The Solar Inverter will start reducing its output power at 50.2Hz
Output power will be reduced to minimum when the frequency is 52.7Hz
The Solar Inverter will disconnect when the frequency is higher than 53 Hz