Sealegs charges into the future with amphibious craft / on renewable energy

The release of the Electric E4 takes Sealegs’ global leadership position in amphibious technology to the next level. We have made our amphibious system 33% faster, 60% quieter and 50% more powerful.

Maurice BryhamFounder and Chief Technology Officer Sealegs

Project / story

Their challenge

Sealegs is a world leaders in amphibious crafts, designed and developed to take all the hassle out of boat launching and retrieval. The system simply drives from a storage location, down a boat ramp or beach and into the water. Once afloat, the wheels lift up out of the water to be stored against the hull, and the boat is used as normal.

The company has been driving the amphibious boating revolution since its start in 2001. The very first versions had electric motors driving the wheels, while across the rest of its models hydraulic propulsion is powered by a petrol engine. But the E4 combines high-torque brushless electric motors with MG’s high density 7kWh lithium battery technology. In many ways it may be the best Sealegs craft yet.

Without a petrol engine roaring the E4 is quieter, but runs faster and longer than conventional models. With a standard 150hp outboard it achieves 40 knots, while it drives for around 1.5 hours on a land, depending on speed, load and terrain. Performance is further increased by regenerative braking and outboard charging. All the usual safety features, such as emergency braking, are included.

Without having to accommodate a petrol engine, there’s more flexibility to house the 51 V 7 kWh lithium ion battery, which takes four to five hours to fully recharge, by simply plugging it into a 240 V mains supply. The outboard also feeds the battery via the VSR and a PowrFlow step-up charger, as does the regenerative braking system. Solar power is another option. All systems are connected to a central Naviop display which supports MG’s battery systems to show battery status.

Combining of the latest battery and motor technology quite possibly represents the future of amphibious boating. “The release of the Electric E4 takes Sealegs’ global leadership position in amphibious technology to the next level,” according to Founder and Chief Technology Officer Maurice Bryham. “We have made our amphibious system 33% faster, 60% quieter and 50% more powerful.”

Our solution

Components used

Project / specs

System voltage

51.1 V

Total capacity

14 kWh

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