In the Victron Energy Cyrix-Li-Ct battery combiner, the first step of protection of the battery is cell balancing. The second step is shut down in case of cell under voltage. The second step can also include shut down or reduction of the charging current in case of high or low temperature.
The Cyrix will parallel connect a lead acid starter battery and a LiFePO4 battery:
The Cyrix will disengage immediately:
Cyrix 12V system with 120A:
Cyrix 24V system with 120A:
Cyrix 12V system with 230A:
Cyrix 24V system with 230A: