Red Eléctrica de España has signed a collaboration agreement with the Electrical Engineering group from the School of Advanced Engineering of the University of Seville for monitoring the ‘Almacena’ (energy storage) R&D+i project, in which the Company has invested over 3.5 million euros. With a power output of 1 megawatt (MW) and a 3 megawatt hour capacity (MWh), this electrochemical storage system was installed in 2013 at the Carmona substation (Seville), and has a similar capacity to 600,000 typical smartphone batteries.