A Danfoss Editron marine drivetrain system is powering the Southern Hemisphere’s first fully electric passenger ferry, after the East by West Ferries service officially launched the ‘Ika Rere’ zero-emission vessel in Wellington, New Zealand.
Research by the New Zealand Government has found that domestic ships such as ferries and freighters emit close to 300,000t of CO2 every year. In Wellington, nearly 50% of the city’s emissions were produced from the transportation sector in 2020. With the local council committing to becoming a net-zero-carbon city by 2050, introducing alternative energy forms of transportation is crucial.
The 19m long Ika Rere ferry can carry up to 132 passengers on journeys across Wellington Harbour at an operational speed of 20 knots. It has been designed and built to complete one return run of 25km before charging dockside at a rate of 1MW for 15 minutes while passengers disembark and board. The ferry will be charged from a 300kW charger at its overnight berth during its first year of operation. It is anticipated that the Ika Rere ferry will save approximately 640t of CO2 annually compared to a similar-sized diesel alternative.
New Zealand electrical company McKay acted as the project’s lead electrical designer and system integrator, choosing Danfoss’ Editron drivetrain systems to power the ferry. The system consists of two propulsion motors, two grid solutions for the AC network and six DC/DC converters connected to the vessel’s batteries. All of these components operate via a DC cabinet and are controlled via an electronic control system.
Erno Tenhunen, marine director, Danfoss’ Editron, said: “As companies, cities and countries around the world continue to set CO2 reduction targets, the demand for zero-emission vessels and machines continues to grow. Our Editron marine system provides outstanding efficiencies within a power range of up to six megawatts. It is also compact and lightweight, enabling space and weight savings and increasing design freedom. These savings ultimately benefit passengers, as operators can provide a greater level of comfort.”
Jeremy Ward, MD East by West Ferries, said: “While Ika Rere has cost more than an equivalent-sized diesel boat, we will make savings back over time thanks to its cheaper running costs. The ferry’s electric motors, provided by Danfoss’ Editron division, require less maintenance than traditional diesel versions. The cost of charging the vessel’s batteries is also significantly less than filling it up with diesel.”
The Ika Rere ferry will complete survey sea trials before entering a commissioning stage with East by West Ferries. It will undertake a number of public sailings during the commissioning phase before being released into full service by the end of Q1 2022.
