An analysis on the port infrastructure to new E-ferries

26 June 2023 - Published by Katharina Rubahn

The report is a case study analysing port infrastructure strategies for the charging of battery electric ferries on the Island of Ærø participating in the ZEM Ports North Sea project. Barriers are identified from the EU Horizon 2020 E-Ferry project and its charging station in the port of Søby. These findings are used to define three alternative strategies for design and operational setup of shore infrastructure in a case study for two new E-ferry Twins planned to operate from the Island of Ærø in 2026.

The introduction of shore-based energy storage to port infrastructure and charging stations is found to have the potential to significantly lower barriers to battery electric ferry operation if ancillary services are performed as described in the case study. This way battery electric ferries could create value for grid responsible operators as well as ferry operators.

Using the spreadsheet model, a number of scenarios have been prepared changing central variables to conclude on sensitivities to energy costs. Energy costs are based on two different year intervals and price regimes, and then compared to fossil fuel costs with and without CO2 quotas or CO2 emission fees.

With the right tools installed, Vessel-To-Grid (V2G) discharging can generate extra income for the ferry operator enhancing ancillary balancing services and demand response considerably. Keeping the grid frequency at 50 Hz is an important task for the Balance Responsible Parties (BRP).

Download the report here.