-----by 2050 and it will be well over €100 billion of capital investment. The Deputy is correct that if it were 30 GW it would be about €80 billion. It costs about €3 billion per gigawatt to develop offshore. It depends on whether it is fixed or floating but that is the rough guidance figure. It is enormous expenditure and it has the potential to employ tens of thousands of people around the Irish coastline, in parts of the country that perhaps do not have this kind of industry and employment opportunity at the moment because of isolation in geographic location and so on.
The energy sector is transforming rapidly, as the Deputy suggests. Meeting our national climate targets will require a significant increase in the development rates of renewable energy, and there are opportunities for Irish industry to capitalise on this. With the support of my Department, Enterprise Ireland's sustainability department is examining emerging areas of opportunity and how best to develop Ireland's renewable energy sector as a basis for competitive advantage. Enterprise Ireland has been working on developing Irish SME capability in the offshore wind sector since 2018, and has developed an offshore wind supply chain cluster, the Gael Offshore Network. This cluster has achieved substantial growth over the past five years, with numbers increasing from approximately 40 companies in 2019 to over 90 companies today. These companies provide a range of products, services and skill sets to the offshore wind industry sector.
This work aligns with the framework for enterprise policy for the period to 2030, as outlined in the White Paper on enterprise. Actions aimed at developing indigenous supply chain capacity will be an integral part of these initiatives. The scale of Ireland's offshore wind potential offers a once in a century industrial development opportunity. My Department is leading on the development of a national industrial strategy for offshore wind, with significant involvement from El and IDA Ireland, which are contributing to industry knowledge and expertise. This strategy will aim to maximise the gain for Ireland from the current and future growth of the industry that is expected over the next 25 to 27 years. We will publish that strategy towards the end of March, just after St. Patrick's Day.