Onshore Power Supply

Onshore Power Supply

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Welcome to the Onshore Power Supply website!

This independent non-profit website was released in spring 2010 by the working group on Onshore Power Supply (OPS) established by the World Ports Climate Initiative (WPCI).

The website provides a wealth of practical information about OPS for seagoing vessels as a measure to improve air quality in ports and port cities and reduce emissions of air pollutants and noise and to a lesser extent carbon dioxide, by replacing onboard-generated power from diesel auxiliary engines with electricity generated onshore. The website is targeted particularly at port authorities, terminal operators and shipping companies considering introduction or expansion of the technology.

OPS Questionnaire

Besides setting up this website, the WCPI has also conducted a survey on OPS among port authorities. The report as well as the presentation discussing the outcome are now available.

If you have comments, questions or suggestions regarding the website please click here.

OPS website online

This website is online since spring 2010. The WPCI OPS working group would like to express its gratitude to the following organizations for providing information and comments: Port of Los Angeles, Port of Gothenburg, Port of Rotterdam, Port …

Port of Gothenburg receives award for OPS

6/12/2011 Port of Gothenburg was one of the winners in the prestigious Energy Globe Awards 2011 for its work on shoreside power connection for vessels at berth. The award, EUR 10,000 and a 17 kg bronze statue, was presented at a gala in Austria.

Color Line to have OPS in Oslo

04/03/2011 Color Line ships are to have OPS while they are berthed in Oslo. The planned facility can supply up to 4.5 MW. Color Line has received financial support from Transnova, Enova and Oslo Havn KF when converting to the new technology. The …

OPS tax exemption under discussion

21/02/2011 In the context of the revision of the EU Directive on energy and electricity taxation (2003/96/EC), the introduction of a tax exemption for the electricity provided to seagoing vessels through Onshore Power Supply (OPS) systems is …

New Gothenburg OPS facility

26/01/2011 This week Stena Line inaugurates a completely new onshore power supply facility in Gothenburg, including a frequency transformer, for the company's ferries operating between Sweden and Germany. In total, one in three vessels that put …

APL moves one step closer to a …

18/09/2010 APL has been retrofitting its C-11 class vessels with OPS capabilities throughout 2010. The last of the five ships returned to service this month from the Keppel Shipyard in Singapore.


The OPS technology is known by a variety of names: Alternative Maritime Power (AMP), Cold Ironing, Shoreside Electricity and Onshore Power Supply. The IEC/ISO/IEEE standard in preparation uses the term High Voltage Shore Connection System (HVSC) which as the term suggests addresses the connection between ship and shore and the procedures for safe operation.

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CE Delft