For example, a dual engine Boston Whaler 280 Outrage gets 1.7 mpg (2.4 liters per nm) at 25 knots, which is equivalent to around 20 kWh per nautical mile. The Candela C-8 uses just 1.2 kWh of ...

Candela and Polestar have teamed up to create world's longest-range production electric boat, ... (65 miles or 105 kilometers) per charge at a cruising speed of 22 knots (25 mph or 40 km/h).