When using the Yeti PRO 4000 with the Haven:

Automatic Power Switching and Passthrough functionalities are not available if a GFCI protected circuit is supplying power to the Yeti PRO 4000. Before installing, have your electrician confirm the power supplied to the Yeti PRO 4000 is not from a GFCI protected circuit. This applies whether the Yeti PRO 4000 is directly plugged into the GFCI receptacle or to another receptacle on the same circuit. GFCI rules differ by area. Check with your local electrician or city for the latest information.