Grenergy has signed a 10-year financial tolling agreement for its 150MW/600MWh standalone battery project in Oviedo, marking what it described as the largest announced storage scheme of its kind in Spain.
The agreement, effective from January 2028, was concluded with an international utility holding an investment-grade rating from Moody’s. Grenergy will retain responsibility for operating the asset and managing battery trading.
Construction of the Oviedo project is already under way on a former industrial site adjacent to the La Estrecha substation in La Corredoria, with commercial operations expected in the first half of 2027.
The four-hour storage facility is the flagship Spanish project within the company’s Greenbox standalone storage platform, which Grenergy said now has a pipeline exceeding 30GWh across Poland, Romania, Germany, Italy, Spain and the United Kingdom.
Chief executive David Ruiz de Andrés said the company was “very proud of this financial tolling agreement,” describing it as the first of its kind in Spain and a model it intends to replicate across Europe.
Grenergy added that Spain is set to become one of its key strategic markets as it expands both standalone battery and hybrid renewable projects.
