SolarEdge backup interface issue

[GaborSparky]

Anyone had a SolarEdge backup interface that does not power the property during powercut?
The battery is fully charged, you can hear the contactor switching over, leds confirm that it's in backup mode, but house has no power...

 

[James]

has it been wired incorrectly?
is the invertor producing power that is not being supplied to the property, or even worse, being sent down the unpowered grid supply?