External Transfer Switch - Multiplus 8, 10 and 15kW

[Ersus]

Also NL…
I am going to test the setup with the S99 fw first without the Ziehl.
I need an contactor that is quick enough to switch in the time the MP gives the signal to it after syncing.

MultiPlus2 EXTERNAL transfer switch w. ESS

Before I will order the Ziehl, I had recently set up a test system with the S99 firmware in a 3-phase setup. The master unit uses the Aux Relay to switch the External Relay. I encountered a phase rotation issue between the phases, which initially prevented two of them from synchronizing. I adjusted the phases to a clockwise phase rotation, after which the phase synchronization was successful. You can monitor this process via VE.Configure for the VE.Bus system. The MultiPlus system syncs the…