PoE doesn't start_GS308EP

CorentinF wrote:

If we turn our system ON, by starting it from the inverter (with the circuit breaker open), the PoE launches without a problem, in all cases.

If we turn  our system ON, with the circuit breaker close and we start the inverter, the PoE doesn't launch, and if we open the circuit breaker, the supply from the inverter takes over and the PoE launches immediately 

That circuit breaker is making a direct connection from the AC mains to the Inverter output?

How is the inverter output kept synched to the 50 or 60 Hz mains?

When I'm thinking what (certainly will) happen on our Swiss Army Museum Site when we fire up the big Sulzer Diesels and connect the three phases to the AC mains power network -without- the diesel generators being almost in sync with the mains. Shudder - the power network will likely win, the installation would loose, and break badly.

This is what I understand from your initial description.

PS. To avoid confusion to the future readers,

I'll move the post to the 

Easy Smart, Plus and Smart Switches | NETGEAR Communities section, and have removed the Managed Switch tag from your original port, because of the GS308EP is not a Managed Switch in Netgear terms - it's a Smart Managed "Plus" Switch model.