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Acciona Energia has received the first ever prototype certificate for a grid-scale energy storage solution by DNV GL. The plant in Barásoain in Navarra, northern Spain is equipped with a storage system that consists of two batteries located in separate containers: one fast-response battery of 1 MW/0.39 MWh (capable of maintaining 1 MW of power for 20 minutes) and another slower-response battery with greater autonomy (0.7 MW/0.7 MWh, maintaining 0.7 MW for 1 hour).
 
Both have Samsung SDI Li-ion technology connected to a 3-MW AW116/300 wind turbine of Acciona Windpower (Nordex) technology, from which they capture the energy to be stored. The wind turbine is one of five that make up the Experimental Wind Farm at Barásoain, operated by the company since 2013. The entire system is managed by control software developed in-house by Acciona Energia and is monitored in real time by the company’s Renewable Energies Control Center (CECOER). The certification process was carried out in line with the GRIDSTOR Recommended Practice, which is based on industry standards and considers safety, performance and reliability for grid-connected energy storage systems.
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