On my 2013 ACE the BCC (Battery Control Cabinet) controls many of the DC coach battery and chassis battery circuits (not AC). Do you have a transfer switch and generator in your coach? If yes does the running generator operate your AC receptacles OK? if yes, I would check the transfer switch wiring/operation on the shore power side. Use a multimeter on AC voltage settings and trace out where your shore power is good as it enters the coach and then stops. Make sure shore power is good first of course and use safe electrical procedures.