Photovoltaic solar energy
We are harnessing the power of the sun
We are champions of photovoltaic solar energy. At Iberdrola, we are committed to the fight against climate change, which has driven us to support renewable energy sources in order to make the energy transition a reality.
As part of the plans to grow in clean energy, solar photovoltaic technology will be supported by 18% of the investments earmarked for renewables in the Strategic Plan 2024-2026, which will increase installed solar capacity by around 2,100 MW, with a portfolio of 1,900 MW. Iberdrola had a total of 7,470 MW of photovoltaic power as per the nine months 2024.
What is photovoltaic energy?
Photovoltaic solar energy is a clean, renewable source of energy that uses solar radiation to produce electricity. It is based on the so-called photoelectric effect, by which certain materials are able to absorb photons (light particles) and release electrons, generating an electric current.
A semiconductor device called a photovoltaic cell is used for this purpose, which can be made of monocrystalline, polycrystalline or amorphous silicon, or other thin-film semiconductor materials. The cells made from monocrystalline silicon are obtained from a single crystal of pure silicon and achieve maximum efficiency, between 18% and 20% on average.
Those made from polycrystalline silicon are made in blocks from several crystals, so they are cheaper and have an average efficiency of between 16% and 17.5%. Finally, those made from amorphous silicon have a disordered crystalline network, which leads to a lower performance (average efficiency between 8% and 9%) but also a lower price.
Advantages of photovoltaic solar energy
Optimal for rural areas
A system suitable where power lines do not reach or are difficult to install
Modulable according to need
It can be produced in small generator installations and in large photovoltaic plants
Green jobs
Contributes to the creation of green jobs and local economic growth
More information
Photovoltaic energy, key in the fight against climate change
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Avangrid completes installation of 105,000 modules for its first PV plant in California
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Iberdrola begins installation of modules at Camino Solar (California)
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Iberdrola Australia enters Queensland market with Broadsound Solar Farm and Battery
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Iberdrola increases its renewable production in Portugal with two new photovoltaic plants
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Iberdrola begins producing clean energy at its True North photovoltaic plant in Texas
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Iberdrola begins installation of the Powell Creek solar plant in the United States
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Iberdrola begins construction of its first photovoltaic plant in California
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Iberdrola and FCC sign an agreement to promote photovoltaic panel recycling
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Iberdrola tests Antecursor II robot at its Villarino photovoltaic plant
How do photovoltaic plants work?
Photovoltaic solar energy is obtained by converting sunlight into electricity using a technology based on the photoelectric effect. It is a type of renewable, inexhaustible and non-polluting energy that can be produced in installations ranging from small generators for self-consumption to large photovoltaic plants. Find out how photovoltaic energy is obtained.
- Thanks to the photoelectric effect, the electromagnetic radiation emitted by the sun is converted into electrical energy
- The alternating electric energy, now suitable for consumption, is distributed along transmission lines
- Photovoltaic panels are formed from cells that absorb light particles (photons) and release electrons or direct electric current
- The continuous electrical energy produced by the panels is converted into alternating current by the inverters
- Transformers raise the electricity to a medium voltage (up to 36 kV)
Our most emblematic photovoltaic solar energy projects
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True North, Avangrid's largest solar photovoltaic project in Texas
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Francisco Pizarro, the largest photovoltaic plant in Europe
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Santiago, our largest photovoltaic plant in the world
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Lund Hill, Washington's biggest solar project
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The Cedillo photovoltaic project, a real engineering challenge
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Núñez de Balboa, one of the biggest photovoltaic plant in Europe
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What is photovoltaic self-consumption?
Photovoltaic self-consumption occurs when individuals or companies consume energy produced in photovoltaic generation installations close to the point of consumption. In addition to the solar panels themselves, photovoltaic self-consumption installations are made up of other elements such as inverters, cables, connectors and, optionally, batteries. This type of consumption not only saves on electricity bills, but also contributes to curbing climate change by using renewable energies.
There are two types of photovoltaic self-consumption depending on the destination of the energy that the owner of the installation does not use: self-consumption without surplus, which does not involve the discharge of surplus energy into the grid; and self-consumption with surplus, which allows the injection of surplus energy into the transmission grid.
More about solar energy
What is solar energy?
Solar energy is a renewable and inexhaustible source that allows us to generate electricity from the radiation that reaches us from the sun. Committing to solar energy means committing to the fight against climate change and accelerating decarbonisation.
Discover solar energyWhat is solar energy?
Solar energy is a renewable and inexhaustible source that allows us to generate electricity from the radiation that reaches us from the sun. Committing to solar energy means committing to the fight against climate change and accelerating decarbonisation.
Discover solar energyArticles from our guest authors
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- ANTARES, accelerating the development of renewable energies
Ester Cámara
Estefanía Segovia
- ANTARES, accelerating the development of renewable energies
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AVANGRID (NYSE: AGR), a leading sustainable energy company and member of the Iberdrola Group, announced today that it has achieved commercial operation at its 162 MWac (205 MWdc) Pachwáywit Fields solar farm (also known as Montague Solar) in...
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Photovoltaic energy is a renewable and clean energy source that uses solar radiation to produce electricity. It can be produced by small generators for self-consumption or in large photovoltaic plants, and is one of the most important renewable energies for achieving decarbonisation goals.
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Iberdrola reinforces its innovative and renewable leadership in Spain and will build Spain's first hybrid wind and solar plant in Castilla y León, in the province of Burgos. The company continues with the construction of two photovoltaic plants...
Iberdrola has submitted a photovoltaic panel manufacturing project to the third call of the Innovation Fund, the European Commission's grant programme for the demonstration of innovative technologies to reduce emissions. The manufacturing...
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We strengthen our strategic alliance with MAPFRE to reach almost 450 MW of renewable energy in Spain
Iberdrola and MAPFRE are strengthening their strategic alliance in the energy sector in Spain. Both companies have added 150 new photovoltaic megawatts (MW) to the company created two years ago, bringing the total to 445 MW: 295 MW wind and 150...
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Avangrid, Iberdrola's US subholding company, continues growing in the southern United States and making progress in the construction of its first photovoltaic plant in the state of Texas, aimed at reaching 321 MW of capacity. To this end, it will invest USD 30 million in solar trackers from Array Technologies (ATI).
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