is my daughters dog afraid of the inverter ?

my daughter has a 3kw ac inverter and 8.kw battery system which works just fine . we have however noticed that her dog will not go in the room with the equipement in ie its under the stairs where he always slept , now its a no go zone for him . Just puzzled why this should be , maybe the equipement makes a noise a humann cannot hear ????. ANYONE ELSE NOTICED THIS

Inverters do make high frequency sounds. Something most humans can’t hear but dogs probably can.