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MARA Refuses 300MW Floating Solar Plan for Shannon Estuary

16th October 2026
Aerial view of Loop Head Lighthouse at the mouth of the Shannon Estuary, Co Clare
Solar Setback – Loop Head Lighthouse at the mouth of the Shannon Estuary, Co Clare. MARA has refused maritime area consent for a proposed 300MW floating solar development elsewhere in the estuary, citing technical, financial and marine planning concerns Credit: AirSwing Media

Ireland's maritime regulator has refused consent for a proposed 300MW floating solar development in the Shannon Estuary, citing concerns over the applicant's technical and financial capability and the project's alignment with Government marine spatial planning policy.

The Maritime Area Regulatory Authority (MARA) has refused a Maritime Area Consent (MAC) application for a proposed 300MW floating solar development in the Shannon Estuary, between counties Clare and Limerick.

The decision, dated Tuesday, 13 October 2026, concerns an application by Net Zero Energy Project 4 Limited for floating solar photovoltaic units and associated marine infrastructure.

The MARA application record identifies the proposal under reference MAC20230032, following an application submitted on 12 July 2024.

The proposed development included floating solar generating units, mooring systems and associated electrical cabling.

Technical and Financial Capability

In its final determination report, MARA identified three grounds for refusing the application.

The first concerned the applicant's technical capability and experience in delivering projects comparable to the proposed development.

MARA found that the applicant had not demonstrated the required prior corporate project experience, stating that the reference projects submitted were not comparable in scale or nature to the proposed 300MW floating offshore solar development.

The regulator also concluded that the applicant had not satisfied the statutory requirements concerning financial commitments or obligations associated with the proposed maritime usage.

Net Zero Energy Project 4 Limited disputed these findings in additional submissions, arguing that it had demonstrated the necessary technical competencies for a project involving an emerging renewable energy technology.

The applicant also questioned the timing of the financial assessment while MARA's Maritime Area Consent levy arrangements were under review.

MARA maintained its assessment, finding that the ongoing levy review did not prevent it from determining the application.

Government's Plan-Led Approach

The third ground for refusal concerned the proposal's compatibility with Government policy for offshore renewable energy development.

MARA found that the proposed floating solar project did not align with the Government's plan-led approach to developing offshore renewable energy in Irish waters.

The applicant argued that floating solar was an emerging technology and that the application should be considered in the context of continuing developments in marine planning policy.

It sought either a grant of consent or a deferral of the decision pending further policy and regulatory developments.

MARA declined to defer its determination and assessed the proposal against the policies applicable at the time.

The regulator acknowledged the potential contribution of the development to renewable electricity generation but concluded that the application did not satisfy the requirements for granting Maritime Area Consent.

Floating Solar in Irish Waters

The Shannon Estuary proposal is substantially larger than earlier floating solar developments considered for Irish coastal waters.

In 2021, Afloat reported on a proposed 1.5MW floating solar installation at Ringaskiddy in Cork Harbour, involving Mayo-based SolarMarine Energy.

That project highlighted regulatory challenges facing floating solar technology under the marine licensing arrangements then in place.

The Shannon Estuary proposal is a separate development involving a different applicant.

MARA issued a preliminary notice indicating its intention to refuse the Shannon Estuary application on 7 August 2026.

The applicant submitted further material on 28 August, which was considered before MARA issued its final determination on 13 October.

The formal refusal notice confirms that Maritime Area Consent was not granted.

The decision concerns the applicant's request for consent to occupy and use the maritime area. It is not a refusal of planning permission or a general prohibition on floating solar development in Irish waters.

Afloat.ie Team

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Marine Protected Areas (MPAs) - FAQS

Marine protected areas (MPAs) are geographically defined maritime areas where human activities are managed to protect important natural or cultural resources. In addition to conserving marine species and habitats, MPAs can support maritime economic activity and reduce the effects of climate change and ocean acidification.

MPAs can be found across a range of marine habitats, from the open ocean to coastal areas, intertidal zones, bays and estuaries. Marine protected areas are defined areas where human activities are managed to protect important natural or cultural resources.

The world's first MPA is said to have been the Fort Jefferson National Monument in Florida, North America, which covered 18,850 hectares of sea and 35 hectares of coastal land. This location was designated in 1935, but the main drive for MPAs came much later. The current global movement can be traced to the first World Congress on National Parks in 1962, and initiation in 1976 of a process to deliver exclusive rights to sovereign states over waters up to 200 nautical miles out then began to provide new focus

The Rio ‘Earth Summit’ on climate change in 1992 saw a global MPA area target of 10% by the 2010 deadline. When this was not met, an “Aichi target 11” was set requiring 10% coverage by 2020. There has been repeated efforts since then to tighten up MPA requirements.

Marae Moana is a multiple-use marine protected area created on July 13th 2017 by the government of the Cook islands in the south Pacific, north- east of New Zealand. The area extends across over 1.9 million square kilometres. However, In September 2019, Jacqueline Evans, a prominent marine biologist and Goldman environmental award winner who was openly critical of the government's plans for seabed mining, was replaced as director of the park by the Cook Islands prime minister’s office. The move attracted local media criticism, as Evans was responsible for developing the Marae Moana policy and the Marae Moana Act, She had worked on raising funding for the park, expanding policy and regulations and developing a plan that designates permitted areas for industrial activities.

Criteria for identifying and selecting MPAs depends on the overall objective or direction of the programme identified by the coastal state. For example, if the objective is to safeguard ecological habitats, the criteria will emphasise habitat diversity and the unique nature of the particular area.

Permanence of MPAs can vary internationally. Some are established under legislative action or under a different regulatory mechanism to exist permanently into the future. Others are intended to last only a few months or years.

Yes, Ireland has MPA cover in about 2.13 per cent of our waters. Although much of Ireland’s marine environment is regarded as in “generally good condition”, according to an expert group report for Government published in January 2021, it says that biodiversity loss and ecosystem degradation are of “wide concern due to increasing pressures such as overexploitation, habitat loss, pollution, and climate change”.

The Government has set a target of 30 per cent MPA coverage by 2030, and moves are already being made in that direction. However, environmentalists are dubious, pointing out that a previous target of ten per cent by 2020 was not met.

Conservation and sustainable management of the marine environment has been mandated by a number of international agreements and legal obligations, as an expert group report to government has pointed out. There are specific requirements for area-based protection in the EU Marine Strategy Framework Directive (MSFD), the OSPAR Convention, the UN Convention on Biological Diversity and the UN Sustainable Development Goals. 

Yes, the Marine Strategy Framework directive (2008/56/EC) required member states to put measures in place to achieve or maintain good environmental status in their waters by 2020. Under the directive a coherent and representative network of MPAs had to be created by 2016.

Ireland was about halfway up the EU table in designating protected areas under existing habitats and bird directives in a comparison published by the European Commission in 2009. However, the Fair Seas campaign, an environmental coalition formed in 2022, points out that Ireland is “lagging behind “ even our closest neighbours, such as Scotland which has 37 per cent. The Fair Seas campaign wants at least 10 per cent of Irish waters to be designated as “fully protected” by 2025, and “at least” 30 per cent by 2030.

Nearly a quarter of Britain’s territorial waters are covered by MPAs, set up to protect vital ecosystems and species. However, a conservation NGO, Oceana, said that analysis of fishing vessel tracking data published in The Guardian in October 2020 found that more than 97% of British MPAs created to safeguard ocean habitats, are being dredged and bottom trawled. 

There’s the rub. Currently, there is no definition of an MPA in Irish law, and environment protections under the Wildlife Acts only apply to the foreshore.

Current protection in marine areas beyond 12 nautical miles is limited to measures taken under the EU Birds and Habitats Directives or the OSPAR Convention. This means that habitats and species that are not listed in the EU Directives, but which may be locally, nationally or internationally important, cannot currently be afforded the necessary protection

Yes. In late March 2022, Minister for Housing Darragh O’Brien said that the Government had begun developing “stand-alone legislation” to enable identification, designation and management of MPAs to meet Ireland’s national and international commitments.

Yes. Environmental groups are not happy, as they have pointed out that legislation on marine planning took precedence over legislation on MPAs, due to the push to develop offshore renewable energy.

No, but some activities may be banned or restricted. Extraction is the main activity affected as in oil and gas activities; mining; dumping; and bottom trawling

The Government’s expert group report noted that MPA designations are likely to have the greatest influence on the “capture fisheries, marine tourism and aquaculture sectors”. It said research suggests that the net impacts on fisheries could ultimately be either positive or negative and will depend on the type of fishery involved and a wide array of other factors.

The same report noted that marine tourism and recreation sector can substantially benefit from MPA designation. However, it said that the “magnitude of the benefits” will depend to a large extent on the location of the MPA sites within the network and the management measures put in place.

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