Enel Libra Flexsys (ELF)
Italian energy transition portfolio (battery storage and open cycle gas turbines)
Core project data
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Location:
Multiple sites in Italy
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Capacity:
2.6 GW (1.7GW / 6.5GWh BESS and 0.9GW OCGT)
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Technology:
BESS and OCGT
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Ownership:
49%
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Project status:
Over 90% operational
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Revenue model:
Contracted
Enel Libra Flexsys (ELF) is a joint venture between Enel, Italy’s leading utility, and Sosteneo, which acquired a 49% stake in the joint venture on behalf of clients in June 2024.
The ELF portfolio has a total capacity of 2.6 GW, consisting of 23 battery energy storage system (BESS) plants with a combined capacity of 1.7 GW and 3 open cycle gas turbine (OCGT) plants totalling 0.9 GW.
The BESS facilities, primarily located in Sardinia, Northern, and Central Italy, use lithium-iron phosphate batteries. These storage systems improve grid flexibility, support the integration of renewable energy, and provide strength support services to enhance system reliability.
The OCGT plants, situated in Lazio and Sicily, complement the storage assets by serving as fast response peaking plants. They are activated during periods of peak electricity demand or when renewable generation is low. Although used sparingly, these plants provide essential “insurance” for when the batteries are discharged and also help to maintain grid stability.
The entire portfolio benefits from 100% long-term contracted revenues, which guarantees stable cash flows.
ELF also promotes sustainability initiatives that include the development of solar plants, lighting for sports fields and bike paths to benefit local communities. ELF has also completed social safeguard screening in accordance with the EU Taxonomy. All major project suppliers and counterparties were analysed to ensure that the project meets robust social and ethical standards.
