How do I know that I have got back up circuits connected already?

Throughout the Dura-I range there is the option to connect critical circuits to the inverter.

You can tell visually. If facing the inverter, on the bottom RHS, there will be a cable to provide the inverter AC power labelled ‘GRID’ and another port behind it labelled ‘BACK UP’. If the ‘Back up’ is not connected to anything, in the event of a power outage there will be no connected circuits to provide power to.

Please note, within the Dura-I App the installer must activate this setting, also an additional earth point is a requirement to prevent islanding.