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Tuesday, October 13, 2020 

Norwegian Electric Systems (NES) has handed over the charging stations at Hareid and Sulesund to Norway's largest ferry company Fjord1.

The charging system is based on NES' latest power conversion and transmission technology. Cooperation with the local grid company MoereNett, Fjord1 and other parties made it possible to put the ferry route into full-electric operation. Calculations were made on both ferry terminals, which showed that the existing power grid would need extra power to achieve the necessary charging power. The power grid was strengthened on both sides and in combination with installation of batteries, the parties found the optimal solution.

The electric ferries Suloey, Hadaroey and Giskoey make an important contribution to reducing emissions. The transition from diesel driven ferries to all-electric ferries on the Hareid-Sulesund crossing will ensure an annual reduction in CO2 emissions of as much as 7,000 tonnes. That equals 3,800 car equivalents.

NES delivered the equipment for propulsion, automation and  charging. Power is sufficient to enable a crossing to be made in headwind when energy used during the crossing is high. Charging power is sufficient to ensure that the onboard batteries can be recharged in six minutes.

The systems on board and on shore act as a single system. When the ferry approaches the charging station, information about the energy consumption used on the trip will be sent to the shore station. In addition to this information, the system will check the power grid and adjust the system so that no voltage disturbances occur. The charging power is automatically adjusted to transfer only the needed energy. Optimal charging power will ensure that unnecessary wear on batteries and power electronics is avoided, both on board and on shore.

The system is equipped remote monitoring by NES at its head office in Bergen, to support local crew if any challenges should occur. NES delivers operational data continuously via a cloud based system, giving Fjord 1 a full overview of consumption and operation. In addition, the charging system can be configured to reduce peak power and limit the amount of energy from the grid for a short period of time when, for example, the price for electricity is high.

In total, the charging stations on this ferry route will carry out about 32,000 charging operations to transfer some 11,200 MWh per year.

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