Ireland – IT services: consulting, software development, Internet and support – Modification of Energy Management System Contract - EMS — EirGrid plc (IRL)

RES-0001 CON-0001 LOT-0001 TEN-0001 TPA-0001 LOT-0001 1 CON-0001 1 TEN-0001 TPA-0001 ORG-0004 26 https://www.eirgridgroup.com/ ORG-0001 EirGrid plc 160 Shelbourne Road, Ballsbridge Dublin Dublin 4 IE061 IRL 0000 tenders@eirgrid.com ORG-0002 The High Court of Ireland Four Courts, Inns Quay, Dublin 7 The High Court of Ireland Dublin D07 WDX8 IE061 IRL The High Court of Ireland +353 1 8886000 HighCourtCentralOffice@courts.ie ORG-0003 European Dynamics S.A. European Dynamics S.A. Athens 15125 EL301 GRC 002024901000 +30 2108094500 eproc-esender@eurodyn.com large ORG-0004 GE Vernova Electrification Software France SAS France France FR101 FRA 00763793-2026 213/2026 2026-11-03+01:00 2.3 eforms-sdk-1.13 3e349246-d6cf-48bc-9b1b-4cb2f1982fce e4b16228-413a-4fac-b670-e5774cfc54c3 2026-10-30+00:00 16:35:58+00:00 01 32014L0025 veat ENG https://www.eirgridgroup.com/ spec-rights-entity ORG-0001 ted-esen ORG-0003 neg-wo-call additional Article 89(1)(b) of the Utilities Directive The EMS platform is a mission-critical operational technology system deployed across EirGrid and SONI control centers in Dublin and Belfast for the real-time monitoring, control and optimisation of electricity generation and transmission across the island of Ireland. EirGrid plc are contracted with GE Vernova Electrification Software France (“GE”), for the provision of software support, development and licencing services for the EMS, which is required to support the ongoing operation, maintenance, evolution and upgrade of the platform. The EMS platform was originally commissioned by Alstom in 2004 and, as a mission-critical operational technology system, and is typically refreshed on a 5 to 7-year lifecycle to maintain performance, resilience, cybersecurity and partner support. The EirGrid and SONI EMS contracts were merged on the 30th September 2012, when the contract was awarded to Alstom at that time. GE has provided the services underpinning the EMS platform since GE's acquisition of Alstom's power and grid businesses in 2015. The contract supporting the EMS platform was extended during the intervening years to support and maintain the critical system. The EMS underpins EirGrid’s ability to safely and securely operate the transmission system on a continuous basis, as required by its obligations as the designated Transmission System Operator (“TSO”). This includes maintaining real-time system visibility and control, ensuring system balance between supply and demand, performing contingency analysis, and supporting critical control room decision-making. These functions are fundamental to system security and resilience, and any disruption would directly impact EirGrid’s ability to comply with its core TSO responsibility of maintaining a stable and reliable electricity system. Without an operational EMS, there would be a substantial risk of imminent country-wide blackout. The EMS platform is highly integrated within the EirGrid and SONI operational technology environments and incorporates proprietary software developed and maintained by GE, that is critical to its operation. Given the criticality, complexity and level of integration of the EMS platform, continued access to these services is necessary to ensure uninterrupted operations and progressing critical enhancements without disruption. The ongoing support services covers essential upgrade projects including integration of EirGrid and SONI EMS platforms, integration with other EirGrid systems such as the Market Management System, integration of control centre tools, such as the Look-Ahead Security Assessment Tool, Voltage Trajectory Tool and Ramping Margin Tool, and other upgrades to enhance cybersecurity controls. A change of provider for these services would be technically infeasible due to the requirement to implement full system replacement, extensive redevelopment and prolonged testing and validation of any new system. In addition to being technically infeasible, this would result in significant inconvenience and duplication of costs. The present EMS represents a multi-year engineering effort requiring specialist domain knowledge in power systems, real-time operations, and control centre tooling, which has been heavily customised and configured to need EirGrid’s requirements, namely to respond to evolving transmission system requirements, and regulatory-imposed changes. Due to the proprietary knowledge that GE possesses, it would not be possible for another supplier to step in to support the EMS and keep it operational. Other critical systems within EirGrid are dependent on EMS data (e.g. the Market Management System and Look-Ahead Security Assessment Tool), and without this data they will cease to function, causing severe effects on the transmission system including downstream effects on the transmission system and users. Therefore, the additional costs referenced in this notice are necessary to renew the EMS contract with GE for up to 12 months, to ensure continuation of critical support, maintenance and development of the EMS platform. Furthermore, in light of the above, a change of provider would cause significant inconvenience and substantial duplication of costs for EirGrid. Modification of Energy Management System Contract - EMS Renewal of the contract for services essential to the continued operation of the Energy Management System (“EMS”), a critical national infrastructure asset. This notice is to be construed as a Contract Modification Notice within the meaning of Directive 2014/25/EU (the “Utilities Directive”), and all obligations, requirements, rights and procedures under the Utilities Directive applicable to modifications of a contract during its term shall apply to this notice in full including, but not limited to, Article 89 and Annex XVI. For the avoidance of doubt, this notice shall not have the effect of a Voluntary Ex Ante Transparency Notice under Directive 92/13/EEC (as amended by Directive 2007/66/EC) (the “Remedies Directives”), and should not be relied upon as such.

Value of uplift excluding VAT: €9,000,000 EUR

Total contract value after the modifications Value excluding VAT: €45,800,000 EUR services 72000000 IE061 IRL LOT-0001 ORG-0001 ORG-0002 ORG-0002 true 1 Modification of Energy Management System Contract - EMS Renewal of the contract for services essential to the continued operation of the Energy Management System (“EMS”), a critical national infrastructure asset. services 72000000 IE061 IRL 2026-10-30+00:00

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