One of the most sophisticated energy-resilience projects ever deployed in Ireland is underway in Galway, marking a significant milestone for the Irish industrial sector.
Ohk Energy, Ireland’s leading renewable energy installer, is delivering Ireland’s largest onsite, blended-technology renewable energy and resilience system for Dexcom, a global leader in continuous glucose monitoring for people living with diabetes.
When fully operational, the system will set a new benchmark for industrial resilience, carbon reduction, and long-term cost stability, while supporting national grid reliability and Ireland’s climate-action targets.
The flagship project in Athenry combines solar PV, long-duration battery storage, and two HVO biofuel generators into a fully integrated 11.25 MW on-site power system -designed to keep Dexcom’s critical manufacturing facility operational under all conditions.
The system represents a multi-million-euro investment in Ireland’s renewable infrastructure and is one of the most sophisticated resilience projects ever delivered for an Irish manufacturing site.
The combined 11.25 MW installation includes 1.25 MW of solar PV (2,016 panels ), a 6 MW/6 MWh Battery Energy Storage System, and 4 MW of HVO-fuelled backup generation.
The solar array spans a 178,000 sq ft rooftop – larger than Croke Park – and the 1.25 MW system alone can power the equivalent of approximately 340 homes.
The installation is expected to supply around 30% of Dexcom’s daytime annual electricity demand, while ensuring full operational continuity during grid outages. The integrated system improves safety, protects production schedules, stabilises energy costs, and advances Dexcom’s global net-zero commitments.
During a grid event, the battery system can also support national stability through participation in EirGrid’s DS3 programme, creating an additional operational revenue stream.
“This is a flagship project for Ireland,” said Ohk Energy Commercial Managing Director, Brian Healy.
“It shows what’s possible – and what’s coming next – for Irish industry. It proves that multinational manufacturers can integrate world-class renewable and resilience technologies, support Ireland’s grid, hit ESG goals, and enhance the country’s position as a hub for sustainable industry.”
Healy added: “This is a game changer in how Irish industry manages energy. With this level of insight, control, and resilience, businesses can protect operations, stabilise costs, and actively support the grid. Projects like Dexcom’s can be delivered today – long before national grid upgrades arrive – and they unlock enormous value for Ireland.”
With over 1,000 employees on site, uninterrupted power is essential for Dexcom’s production, safety, and global supply chain. Recent events such as Storm Eowyn have highlighted the vulnerabilities of Ireland’s grid, and this system ensures that similar disruptions will not affect Dexcom’s manufacturing operations.
“Ireland can be a world leader,” Healy continued. “When large energy users, medtech, pharma, tech, food and beverage, data centres, adopt systems like this, it strengthens the entire network. Every project like Dexcom’s benefits the FDI community, SMEs, households, and Ireland’s Climate Action Plan targets.”
Dexcom Vice President of Operations, Adrian Furey, said: “This project represents a major step forward for Dexcom – for our business, for our people, and for the planet. We are proud of the ambition and scale of this initiative. By investing in world-class renewable energy and resilience technology, we are strengthening our operations today while supporting Ireland’s transition to a cleaner, more secure energy future.”
Each element of the system was tailored to Dexcom’s operational profile. Ohk Energy used a basis-of-design approach to optimise solar production, storage duration, carbon savings, and system resilience while future-proofing for long-term growth.
With an expected 2.5–3-year return on investment, and full lifetime operations and maintenance provided by Ohk Energy, the project delivers both immediate and long-term value.
The full system is scheduled to go live in July 2026.
