Renalfa to merge 365 MWp solar, 400 MW BESS in Romania
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- Renalfa Power Clusters acquired two late-stage renewable energy projects in Arad County, western Romania: the 365 MWp Horia 2 solar power plant and a nearby 400 MW/800 MWh standalone battery energy storage system (BESS).
- Renalfa intends to merge both assets into a single hybrid power cluster, with a commercial launch targeted for 2027, and described both projects as "fully derisked and in late-stage development."
- Renalfa plans to expand the combined Horia-Arad site in two stages, layering in grid-forming technology alongside the storage capacity.
- The expansion will deploy a hybrid dual-chemistry storage approach that mixes lithium-ion and sodium-ion batteries at utility scale.
- The combined 365 MWp solar + 400 MW BESS pairing is structured as a single clustered asset rather than two separately dispatched resources, a design that lets the battery firm the solar output on-site.
Why it matters: The 800 MWh BESS is large by regional standards, and merging it with 365 MWp of colocated solar turns a variable generator into a dispatchable hybrid cluster. The hybrid lithium-ion/sodium-ion chemistry mix — combined with grid-forming inverters — positions the 2027 launch as a live test of utility-scale sodium-ion in continental Europe, not just a pilot.
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