Trina Storage, the energy storage division of solar group Trinasolar, has switched on the Albispark battery system in Castelo Branco. Rated at 15 MW with a capacity of 60 MWh, it is integrated into an existing 34.4 MW solar plant and, according to the company, ranks among the largest battery storage systems now operating in Portugal.
Prosolia: first international large-scale storage project
The project is a collaboration with independent power producer Prosolia Energy. For Prosolia, Albispark is the first international battery storage project paired with an existing utility-scale solar plant.
Portugal – solar overtakes hydro and wind
For Trina Storage, it is the first battery storage system commissioned in Portugal. The manufacturer supplied an integrated storage solution comprising Elementa battery containers, power conversion systems (PCS) for converting between direct and alternating current, medium-voltage modules and a power plant controller (PPC).
Trina Storage plans further growth in Portugal
“Albispark is an important milestone for Prosolia Energy and demonstrates the value battery storage brings to the energy transition,” says Pedro Pereira da Silva, country manager of Prosolia Energy in Portugal. “Together with Trina Storage, we have delivered a project that improves grid flexibility and strengthens the foundation for future hybrid renewable energy projects in Portugal.”
Power to the people: Spain’s energy communities reach 837
Albispark is part of Portugal’s Recovery and Resilience Plan (PRR), which aims to improve grid flexibility and speed up the integration of renewable energy. Trina Storage says it is currently supporting further battery storage projects in the Portuguese market.
Solar now Portugal’s top power source
The storage build-out comes as solar power gains significant ground in Portugal. In July 2026, photovoltaics accounted for 25.8 percent of electricity generation, overtaking hydropower (21.0 percent) and wind (17.7 percent) for the first time, according to the monthly report of the industry association Associação Portuguesa de Energias Renováveis (Apren). Between January and July 2026, 75.0 percent of electricity came from renewable sources, placing Portugal fourth in Europe behind Norway, Denmark and Austria. Over the same period, renewables were able to cover the country’s entire electricity demand for a total of 694 hours, though not in a single stretch. (nhp)
