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Johnny SammourJohnny Sammour

3 Parallel Inverter Settings

Hello,

I will be soon receiving 3 12kw 3phase inverters, and i will be running them in parallel(1 master and 2 slaves). I have been unable to find some information i need.

1. Do i need to install and connect CT coils for all 3, or just the master?

2. Can i turn off the slave inverters at night to save battery power, or will they all be disabled when that happens?

3. Do i install separate AC (GRID and LOAD) breakers for all of them so that i can do QST2, or just 1 master breaker will suffice?


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Johnny Sammour
Aug 16, 2022
you must install 1 x 3 phase breakers

Is it strictly 1x3? I was ordering 1x4 for every inverter's grid, load, and gen ports to include the neutral lines which will allow it to be isolated from the grid's neutral. although i m still searching if i should connect neutral to ground when the Grid is under a blackout (we get 4 hours of grid power a day in Lebanon)

No you can't turn off the slaves at night, this will cause the master to lose communication with the slaves and therefore the Master will also shut down

Understood, i can accommodate for this idle power in the batteries

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