Clarity on Victron Cerbo-S GX Energy System Control Module and connecting devices

Could anyone please help me with the following questions regarding the Victron Cerbo-S GX Energy System Control Module:

  1. Can I connect the BMV 712 via VE.Direct and use the shunt reading to trigger the two relays independently, e.g., low voltage, high voltage?

  2. Can the Multiplus 12/1600/70 be connected using a VE.Bus connection?

  3. The MPPT 250/100 can connect using VE.Direct?

  4. The Cerbo-S GX can be administered using built-in bluetooth and the Victron Connect app?

Many thanks!