Electricity generation

Global leadership in renewable energy and generation mix

With 125 years of history, Iberdrola’s electricity generation business – which is based on renewable energy and efficient storage – is now present in 14 countries. We have a diversified portfolio of projects and markets, which has enabled Iberdrola to consolidate its position as a leading global player in electrical infrastructure and to lead a sector that is advancing at great speed, driven by electrification.

With a strategic vision that anticipated this structural shift 25 years ago, Iberdrola has quadrupled both its installed capacity, from 16,000 MW in 2001 to nearly 60,000 MW in 2025, and its energy storage capacity, which has increased from 3,000 GWh to 10,200 GWh over the same period.

At the end of 2025, 85% of the nearly 60 GW of installed capacity was emission-free.

Key electricity generation figures

Our figures for 2025, as set out in the Annual Integrated Report, and information on planned investments, as detailed in our Strategic Plan.

€21bn

of selective investment in renewables in 2025-2028

+9,500

MW of new renewable capacity in 2025–2028

> 60,000

MW of renewables by 2028

Key figures for 2025

+58,000 MW of installed capacity (+46,000 MW renewable).

+129,000 GWh of output, including +88,000 GWh renewable (+5.9% vs. 2024), with +8,000 GWh of offshore wind (+39% vs. 2024) standing out.

+2,700 MW of new renewable capacity installed in 2025, 4,600 MW under construction and a further 9,000 MW in a mature pipeline for selective investment.

746

MW installed by 2025

1,086

MW under construction

937

MW under construction

642

MW under construction

559

MW installed by 2025

2,906

MW under construction

468

MW installed by 2025

45

MW under construction

10,200 GWh/year of storage capacity.

€8.25bn EBITDA and €5.26bn of investment diversified across technologies and geographies, with 50% in the US and the UK.

Renewable assets and operational management

During 2025, more than 2,700 MW of additional renewable capacity was installed, bringing total renewable capacity to over 46,000 MW, up 4.1% on 2024. Total installed capacity exceeds 58,000 MW, distributed as follows: 36% onshore wind, 4% offshore wind, 22% hydroelectric, 15% solar photovoltaic, 1% batteries, 5% nuclear and 15% combined cycle and cogeneration.

We also strengthened our commitment to storage with the commissioning of new pumped storage units at the Torrejón and Valdecañas hydroelectric plants, along with the installation of eight new battery projects (six in Spain and two in Australia). At the end of 2025, Iberdrola had approximately 4.5 GW of pumped storage capacity and 0.7 GW in batteries.

Main renewable energy technologies

Hydroelectric power and pumped storage

Hydroelectric technology is the foundation on which the company was built and has now become a key asset alongside pumped storage. This technology allows river flows to be regulated and energy to be stored on a large scale in a sustainable way, offering a fast and flexible response to demand fluctuations and supporting the development of other renewable energies. Facilities such as the Tâmega Gigabattery complex and the historic Aldeadávila hydroelectric plant have become strategic installations, capable of supplying more than one million homes.

At the end of 2025, Iberdrola had 13 GW of installed hydroelectric capacity, of which4.5 GW corresponded to pumped storage systems.

Learn more about Hydroelectric power

Offshore wind: large-scale projects and global expansion

Iberdrola is a global pioneer in offshore wind and has been driving this technology for more than a decade, consolidating it as one of its main growth drivers. At the end of 2025, we have 2.5 GW of installed offshore wind capacity and more than 3.5 GW under construction as part of our strategic plan, which will enable us to reach operational capacity close to 6 GW by 2028.

This growth is supported by key projects such as Saint-Brieuc, which supplies energy to more than 835,000 people in France; theEast Anglia Hub complex, made up of four wind farms that will exceed 3.9 GW of installed capacity by 2028; the German Baltic Sea hub, which will reach 1.2 GW with the commissioning of the Windanker project in 2026, in addition to the already operational Wikinger and Baltic Eagle; and Vineyard Wind I, the first operational offshore wind farm in the US.

Learn more about Offshore wind

Onshore wind: efficiency and consolidation of the generation fleet

With more than 21,000 MW of installed capacity worldwide, Iberdrola maintains its leadership in onshore wind energy and is now present in 11 countries. We continue to strengthen our commitment to this technology, allocating 24% of renewable investment under the Strategic Plan 2025-2028. The aim is to continue increasing installed capacity and repowering older wind farms located in areas with the best wind resources.

Learn more about Onshore wind

Photovoltaics: development and competitiveness of solar plants

One of the main advantages of solar photovoltaic energy is its rapid deployment and competitive cost, making it an ideal complement to the energy mix during daylight hours. These characteristics have enabled us to install 9 GW since 2017. Key projects include the Francisco Pizarro photovoltaic plant (Spain), the largest of its kind in Europe; True North (Texas), Avangrid’s largest solar project in the US; Fenix (Italy), the country’s largest solar plant; and Broadsound (Australia), Iberdrola’s largest solar project in that market.

Learn more about Photovoltaics

Batteries and energy storage systems

The increasing integration of renewable sources into the electrical network is driving the need for longer-duration storage solutions capable of ensuring a constant and reliable supply even during prolonged periods of low renewable generation. For this reason, Iberdrola is also promoting efficient small-scale energy storage through lithium-ion batteries connected to renewable generation sites. Our Strategic Plan 2025-2028 includes €1.5 billion of investment to install 2 GW of new battery capacity, mainly in Spain and Australia.

Learn more about Energy storage

Nuclear energy: clean and stable power

Nuclear energy is a clean source that produces a large amount of electricity from a small amount of raw material, making it highly efficient. It operates continuously and does not depend on weather conditions, positioning it as a very stable source.

Nuclear energy strengthens countries’ energy sovereignty by reducing the need to import fossil fuels. It also contributes positively to reducing CO₂ emissions into the atmosphere.

Learn more about Nuclear energy