RedactedNarrative: At 1526hrs New Rochelle Fire Department (NRFD) responded to incident location on a boat fire. Upon arrival the vessel listed was completely engulfed in flames. the owner of the vessel advised he had shut down the battery power to his boat and left. Shortly after he heard a pop. He returned and observed flames coming from the interior port side circuit breaker panel. He attempted to put out the fire with a fire extinguisher with negative results and claimed no injury. New Rochelle Harbor Master and PO were notified and responded. Fire was extinguished, vessel was pulled from the water, placed in the New Rochelle Marina and secured for the investigation.