Good day. I read a lot of Q&A on the subject, but still have 1 question:

I understand AC OUT 2 works if grid is available .

But does this mean that it only works if AC OUT 2 "feels" grid is available (whether using grid or not), , or does it mean that AC OUT 2 loads must be powered by the grid ?

Thanks.

Details are as follows:

system Is 3x Multi II 48/5000 in parrallel , with ESS

2 SMA PV inv SB 5000 on AC OUT side

1x SMA PV inv SB5000 on AC IN side

For a specific system, i would need to use AC OUT 2 for large loads when there is enough sun or when grid is available (even if not used) , but would NOT want these to be powered when grid is not available .

AC Out 1 would have essential loads connected , and should be the only one operating if from batteries. (Simply because the battery bank cannot handle such large loads as those on AC OUT 2).

SO : 1- in normal times, with grid available, :

- during daytime , loads connected to both AC 1 and 2 are powered from the PV inverters when there is sun ,

If not enough sun, AC OUT 1 is taking from batteries, and AC OUT 2 is taking from the grid ,

- at night, AC Out 1 is taking from the batteries , but AC Out 2 is taking from the grid

2 - If the grid fails , all AC OUT 1 loads are powered from the batteries, and all AC OUT 2 loads are off .

Thanks .