Today’s renewable energy news includes updates on Energy Dome and SRP, NZE, MT Group, among others.
Energy Dome and SRP Partner on 19-MW CO₂ Battery Project in Arizona
Italian long-duration energy storage developer Energy Dome has signed an agreement with Arizona utility Salt River Project (SRP) to deploy a 19-MW CO₂ Battery project in Arizona, marking a significant step forward for innovative energy storage technologies in the United States. The project will utilize Energy Dome’s proprietary CO₂ Battery system, which stores electricity by compressing and liquefying carbon dioxide in a closed-loop process, enabling long-duration energy storage without relying on lithium or rare-earth materials. The technology is designed to provide between 8 and 24 hours of energy discharge, making it well-suited for supporting renewable energy integration and grid reliability. The Arizona project will help SRP enhance grid flexibility, manage peak electricity demand, and increase the utilization of solar and other renewable energy resources. As energy demand continues to rise, utilities are increasingly exploring long-duration storage solutions that can complement conventional battery technologies and provide reliable, dispatchable clean energy. The partnership highlights growing interest in alternative energy storage technologies across North America. For Energy Dome, the agreement strengthens its expansion in the U.S. market and supports the commercialization of its CO₂ Battery platform, which is already being deployed in projects across Europe, the United States, and Asia.
Irish Firm NZE Proposes 600-MW Hydrogen-Based Energy Storage Project
Irish developer Net Zero Energy (NZE) has unveiled plans for the €2 billion Rathrush Green Energy Park, a 600-MW long-duration energy storage (LDES) project in County Carlow that will use green hydrogen to store surplus renewable energy and supply electricity back to the grid when needed. The facility will convert excess wind and solar power into hydrogen through electrolysis, store it in underground lined rock caverns, and later reconvert it into electricity to support grid reliability and energy security. The project is designed to provide up to 600 MW of dispatchable power—equivalent to around 10% of Ireland’s projected peak electricity demand—and could reduce carbon emissions by approximately 180,000 tonnes annually. NZE estimates the development will create up to 1,500 construction jobs and around 70 permanent positions. Currently undergoing community consultation, the Rathrush Green Energy Park is expected to submit a planning application later this year. If approved, it would become one of Ireland’s largest green hydrogen and long-duration energy storage projects, supporting the country’s energy transition, grid stability, and decarbonization goals.
MT Group Begins Construction of 168-MWh Battery Storage Project in Lithuania
Lithuanian energy infrastructure company MT Group has started construction of a 168-MWh battery energy storage system (BESS) in Lithuania, reinforcing the country’s efforts to strengthen grid flexibility and accelerate renewable energy integration. The project forms part of a broader wave of energy storage investments across the Baltic region as Lithuania continues to expand its renewable energy capacity and enhance energy security following its synchronization with the continental European power grid. The battery facility is designed to store excess electricity generated from renewable sources and release it during periods of high demand, helping stabilize the grid, reduce renewable energy curtailment, and improve system reliability. Large-scale storage projects are becoming increasingly important as Lithuania experiences rapid growth in solar and wind generation capacity. The development underscores Lithuania’s emergence as one of Europe’s fastest-growing battery storage markets. With several utility-scale BESS projects currently under development, the country is positioning energy storage as a key pillar of its clean energy transition, supporting decarbonization, grid resilience, and long-term energy independence.
FAHEEMA P