RedactedNarrative: The day prior to the fire the owner had been out on the vessel.  He ran the generator underway.  When he got back to the marina he hooked the vessel up to shore power and he did not note any mechanical or performance issues.  
  
  He left the vessel and got a call that his vessel was on fire.  No one was  onboard this evening.  The fire department was able to use an thermal  imaging camera and noted the source of heat as coming from a burnt out outlet.    It was determined by the fire department the cause of the fire was electrical arcing wired due to an equipment failure.