Over 30 years of experience in clean energy

Energía Hidroeléctrica de Navarra, S.A. (EHN) was founded in 1989, and acquired 15 years later by ACCIONA, forming the foundation of its Energy Division. EHN started out building and acquiring a number of hydro plants in the region of Navarra before expanding into other renewable energy technologies.

In December 1994, the first six wind turbines were installed in the El Perdón wind farm, situated on its namesake mountain range, just 12 kilometres from the city of Pamplona. Each turbine had a capacity of 500 kilowatts and a hub height of 40 metres, marking the company's entry into in wind energy. Almost at the same time, in early 1995, the KW Tarifa wind farm (now ‘El Cabrito’) entered service, the two facilities being the first commercial wind farms in Spain.

Connected to the grid in 2001, the solar plant near Tudela was the largest in Spain at the time, with a peak capacity of 1.2 MWp. Part of the plant was operated commercially, while the rest was dedicated to experimental purposes, marking the company’s entry into photovoltaic energy. Since then, the company has installed over 1600 MWp globally, either under its own ownership or for clients. The largest plant to date is Puerto Libertad in Mexico, with a capacity of 405 MWp.

To manage the entire value chain in the wind energy sector, the company opened its first wind turbine production plant in 2003 in Barásoain (Navarra), using in-house technology. The plant began series production of the AW1500 turbine with a nominal capacity of 1.5 MW. In 2016 ACCIONA Windpower merged with the German manufacturer Nordex, forming a global leader in the sector, with ACCIONA as the primary shareholder.

ACCIONA Energía incorporated 2,105 MW of Endesa’s renewable assets (wind and hydro power) under an agreement reached between ACCIONA and the Enel group for the sale of its stake in the Spanish utility to the Italian company. This was ACCIONA Energía’s largest asset acquisition to date, significantly increasing its installed capacity to 6,455 MW by the end of 2009.

On 7 March 2012 Mexican President Felipe Calderón and ACCIONA President José Manuel Entrecanales inaugurated the Oaxaca II, III and IV wind farms, with a total capacity of 306 MW. This was the largest wind power complex installed by the company to date, and the largest in Latin America at the time. Located on the Isthmus of Tehuantepec, one of the world’s most wind-rich regions, it generates enough power for 700,000 Mexican households using 204 AW1500 turbines built with ACCIONA Windpower technology.

The construction of the 94 MWp Sishen plant in South Africa, in the Kalahari Desert, highlights ACCIONA Energía's dedication to building large photovoltaic facilities, even in the most challenging environments. This commitment has since led to new plants in Chile, Egypt, Ukraine, Spain, the USA, and Mexico, where the largest plant built to date, Puerto Libertad (405 MWp), is located.

On 20 September 2017, ACCIONA Energía inaugurated Spain’s first battery storage plant for wind farm energy in Barásoain (Navarra), showcasing its leadership in innovative energy solutions for combating climate change and advancing decarbonization. Five years later, the company acquired Texas’ largest battery (190MW) and a storage project portfolio exceeding 1GW.

ACCIONA Energía installed Spain’s first grid-connected floating photovoltaic plant on the Sierra Brava reservoir (Cáceres) as a demonstration project to explore optimal electricity generation in such installations. The 1.125 MWp plant covers only 0.07% of the reservoir’s surface and represents a promising innovation for future energy projects.

On 1 July 2021 ACCIONA Energía debuted on the Spanish stock exchange in one of the largest IPOs in recent years. This move aimed to support its ambitious growth plan of reaching 20 GW by 2025 and over 30 GW by 2030. Less than one year later, and following a successful period, on 20 June 2022 the company joined the Ibex-35, Spain’s main stock index, enhancing its international profile and access to finance.

On 14 March 2022, ACCIONA Energía inaugurated Spain's first industrial renewable hydrogen plant in Mallorca, in the presence of two Spanish Government ministers and the President of the Balearic Islands. Developed in partnership with Enagás, IDAE, and Cemex, Power to Green Hydrogen Mallorca underscores the company's focus on high-growth sectors like green hydrogen, offshore wind, EV recharging, self-consumption, and energy services.

ACCIONA Energía has completed its first hybrid renewable energy plant by adding a 29.4MW photovoltaic facility to the existing 36 MW Escepar wind farm, located in the municipalities of Villalba del Rey and Tinajas (Cuenca, Spain).