What is a Duffy? Duffy is your 'original' luxury electric boat. Duffy is a lifestyle. Duffy's motto is, "They do 5 MPH better than anyone else." The seller told me that top speed is 6 MPH and if you cut that back and run at half speed you will make your cruising time double. Cruising time per the seller is 3 hours at half speed and half that at wide open. The seller has done a remarkable job in putting this vessel up for sale. Absolutely spit-shined clean from bow to stern, one of a kind vessel that you will enjoy owning. The boat is perfect for cruising on the bay, especially canals, ...