Dunkelflaute Challenge: Ireland's Electrification Plan Needs Gas Backup, Says Dr. Hugh Dillon
Dr. Hugh Dillon challenges Eamon Ryan's electrification plan, highlighting the critical need for gas generation to address «dunkelflaute» periods. He argues current battery storage is insufficient for multi-day energy deficits, emphasizing the limitations of lithium-ion systems and the early stage of long-duration storage technologies.
Dr. Hugh Dillon of Naas, Co. Kildare, has responded to Eamon Ryan's assertion that electrification is crucial for reducing emissions and that Ireland possesses advantages such as smart meters, a competitive electricity market, and robust wind resources, as outlined in the opinion piece «How Ireland can make electricity cheap again» on June 30th.
Dillon contends that a fundamental flaw exists in Ryan's plan: the assumption that renewables, storage, interconnection, and existing backup generation will suffice. He argues this overlooks the significant challenge of «dunkelflaute» — extended periods during which both wind and solar power generation decline simultaneously across Ireland and Britain. While batteries can provide short-term grid balancing, Ireland's current installed capacity would only meet demand for approximately 30 minutes, insufficient for the multi-day or multi-week deficits observed during such events.
Lithium-ion systems are inherently limited by their energy duration rather than power capacity, and they face additional constraints including thermal runaway risks, lifecycle degradation, and material supply issues. Long-duration storage technologies, which could provide reliable capacity over extended periods, are still in early stages of deployment.
Consequently, Dillon emphasizes that gas generation remains indispensable until these advanced storage solutions are widely available. He advocates for transparent communication with the public regarding the costs associated with maintaining this essential backup and ensuring grid stability.