Following a new research into the barriers to shore power in UK ports, the British Ports Association believes a Green Maritime Fund would be critical to making the initiative a reality.

Shore power, also known as cold ironing, is the provision of shore-based electricity to ships at berth, allowing them to turn off their auxiliary engines.

These auxiliary engines are used for crew and passenger accommodation and cargo operations (such as pumps or heating or cooling systems) and typically use a type of diesel.

Shore connections either provide power from the grid or nearby generation sources. They are commonly fixed at one berth but mobile solutions (by barge) are also in operation.

There are currently no large scale shore power connections in UK ports, due to the prohibitively high capital costs associated with such projects.

The BPA said that the price of electricity in the UK and a general lack of consistent demand means that there is rarely a commercially viable business case for investing in shore power, despite its potential to significantly reduce emissions from ships at berth.

As explained, relatively cheap marine fuel makes it difficult for shore power to compete due to high electricity prices. According to BPA, this could be addressed by the removal of taxes on electricity from shoreside power in line with that available for marine fuel.

The association said that a Green Maritime Fund could support emission reduction projects, including shore power, thus covering for the high costs associated with energy network upgrades. Furthermore, the issue of demand could be resolved through a zero-emission berth standard and a goal-based approach.

“We recognise that whilst emissions from ports and ships are relatively small parts of the emissions puzzle, there is work to do to continue to bring them down. Shore power is likely to play a role in reducing emissions from ships in ports in the future, but there are significant barriers to introducing it in UK ports,” Mark Simmonds, Head of Policy at the British Ports Association, said.

“Government investment in green maritime to mirror investment in green vehicles is critical to helping the industry to continue to lower emissions. We believe that a green maritime fund is needed to support decarbonisation in the ports and shipping sectors, but this alone will not overcome the challenges. We want to have a discussion about how a zero emission standard might help lower shipping emissions and bring greater certainty for ports and investors in low emission technology and infrastructure.

Research undertaken by Arkevista for the BPA found that the total power usage of vessels at berth in the UK was over 641 Gigawatt hours of energy in 2019 – roughly 0.5% of the UK’s total energy demand.

Other findings include:

  • Lack of demand: Whilst the number of vessels in the world fleet of 96,000 vessels with shore power is unclear, research suggests it is currently around 1500, with 809 of those container ships. Only 1.5% of ships on the order book currently will be ready to connect.
  • High Electricity Costs: Electricity prices for big business users is over twice the one (per kWh) in other countries where plugging in ships is common, making it difficult to compete with the cost of marine fuel
  • Uncertain Energy Planning: Adding new capacity presents ports with punitive charges and risks ‘spiky’ demand, further inflating costs, whereas benefits accrue solely to port customers (i.e. ships). Just one shore connection could double the required electricity capacity needed by a port. Container and cruise ships look the most likely segments to be shore power ready in future, although these require the most electricity which presents technical problems. Some ferries and offshore service vessels (OSVs) are also promising sectors

“Research shows that by plugging into the power grid with 100 percent renewable electricity and turning off their auxiliary diesel engines, ships at berth in the UK could reduce emissions equivalent to taking between 84,000 and 166,000 diesel buses, or 1.2 million diesel cars off our roads. As we look for ways to support a green recovery, shore-to-ship solutions powered by green energy represent an easy win,” Mike Hughes, Schneider UK & Ireland Zone President, said.

“We would encourage the government to implement the report recommendations without delay and help ensure we can continue to enjoy the environmental benefits we are currently experiencing whilst supporting the economic recovery.”

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