About the Project
The Elektra represents Finland’s first all electric ferry, and is only the second electric ferry on a commercial route anywhere in the world. The 97.92m ferry is a 24/7 workhorse which runs four times an hour during peak hours and once an hour overnight. The 1.6km ‘gateway’ between Parainen and Nauvo has between 600,000 and 800,000 vehicles crossing a year including heavy goods trucks but a sharp summer spike means over 100,000 vehicles in July alone. To further boost the Elektra’s green credentials, it is fitted with several solar panels that feed back into its power system.
The 1MW PBES energy storage system, comprised of 160 6.5 kWh Power batteries are split into two banks, powering a pair of 900kW, Z-drive, azimuthing thrusters from Rolls-Royce. The fast turnaround of the ship requires a short five and a half minute charging, a challenge made possible due to the CellCool™ liquid cooling batteries.
There are recharging points at both the Parainen and Nauvo turnarounds; a Cavotec vacuum mooring system and recharging tower combo holds Elektra in place while allowing a plug to descend from above to mate with Elektra. The 20kV of power is delivered to a transformer some 150m from the charging tower which reduces it to 690V AC for transfer to the ship. The grid had been recently strengthened nearby, and so it was able to deliver the necessary charge.
Read more about the project here.
Launched in 2017