Equivalent households

One of the largest in the country

In late 2018, ACCIONA completed the assembly of the Puerto Libertad photovoltaic complex, developed in a joint venture (on a 50-50 basis) with Tuto Energy in the State of Sonora (Mexico).

With 405 megawatts peak power (MWp) – 317.5 MW rated capacity – the photovoltaic plant is one of the highest capacity in Mexico and Latin America and the biggest renewables project ever undertaken by ACCIONA in the world owned by the company. 


Of the total capacity of the photovoltaic plant, 229 MWp (180 MW nominal) will be used to supply energy to the Federal Electricity Commission (CFE), following the award won in the second long-term energy auction held in September 2016.

Another 114 MWp (90 MW nominal) comes under a private energy purchase and sale contract between the consortium that owns the project and the company Tuto Energy Trading. This capacity will be sent to the installations of a major Mexican industrial group.

Finally, the energy produced by the remaining 61 MWp (47.5 MW nominal) will be sold on the wholesale electricity market following the extension of the scope of the project, with a view to optimizing its generation capacity in an area with an excellent solar resource.

Puerto Libertad covers almost 10 km2 in the municipality of the same name near the Mar de Cortés coast in the Gulf of Baja California, around 200 kilometers north-west of Hermosillo, capital of the State of Sonora.

The facility, among the biggest photovoltaic plants in Latin America, is equipped with 1,222,800 polycrystalline silicon panels mounted on horizontal tracker systems. These are programmed to track the sun’s path across the sky from dawn to dusk. Placed in a straight line, the structures (20,380 units, each one 59.46 meters long) would cover a distance of 1,212 kilometers, similar to the distance between Mexico City and Houston.

With a total solar capture area of 2.4 km2 (equivalent to 333 soccer fields), Puerto Libertad will produce around 963 gigawatt-hours (GWh) of power per year, sufficient to cover the electricity demand of 583,000 Mexican homes. As it is renewable, this energy will avoid the emission of 925,443 tonnes of CO2 to the atmosphere from coal-fired power stations, representing a cleaning effect on the atmosphere of more than 46 million trees.

ACCIONA carried out the turnkey construction of the plant in the Engineering, Procurement and Construction (EPC) modality. It will also undertake its operation and maintenance for two years, after which time this function will be taken over by a joint venture set up by the two partners in the project.

During the construction phase an average of 500 direct jobs were created, with activity peaks of up to 900 workers. In the operational phase, the plant will provide stable employment for 38 people.


  • Location: Puerto Libertad, Sonora (Mexico).
  • Peak capacity: 404,6 MWp.
  • Rated capacity: 317.5 MW.
  • Technology: Solar photovoltaic with horizontal tracker system.
  • Start-up: 2019
  • Owners: ACCIONA (50%), Tuto Energy (50%)


  • The biggest renewables project ever undertaken by ACCIONA Energía in the world.
  • Developed in a joint venture (on a 50-50 basis) with Tuto Energy 
  • Average annual power production of 963 GWh.
  • Clean energy equivalent to the electricity demand of 583,000 Mexican homes.
  • Electricity output supplied to the Comisión Federal de Electricidad, a private customer and the wholesale market.
  • Site surface of 10 km2, with 2.4-km2 solar capture area, equivalent to 333 soccer fields.
  • More than 925,000 tonnes of CO2 avoided in coal-fired power stations a year.
  • 1,222,800 polycrystalline silicon panels.
  • 1.212 kiometers of horizontal tracker systems.
  • 500 jobs created during the construction phase, with activity peaks up to 900 workers.
  • 38 stable jobs in the operational phase.

Key figures

405 MWp

megawatts of peak power


households supplied


photovoltaic panels


tons of CO2 into the atmosphere avoided


new jobs

963 GWh

Average annual production

ACCIONA seeks to generate positive impacts in the communities where it operates.

Technology and innovation


We provide our customers with real-time traceability of energy from our renewable generation plants and storage systems to their points of consumption. This information is not only integrated in an interface that our customers can use to visualize or download the data or display dynamically in their facilities as a marketing tool, but it is also recorded in blockchain to increase transparency.  The I'MNOVATION Startups program was the umbrella under which the first pilot for this solution was developed.



The activities carried out in the construction of the photovoltaic plant in Puerto Libertad (Mexico) apply the lean manufacturing methodology for the optimization of the construction phase of large photovoltaic installations.

The goal is to reduce costs and timescales in the construction of photovoltaic power plants, as well as to minimize the risks and variability of processes and designs without compromising the quality and safety of these renewable facilities.

In 2018, the cost reduction has been possible thanks to a significant reduction in man-hours in the execution, as a result of contracting with this logistics model, as well as in the man-hours of machinery.

The process improvements implemented enable ACCIONA to tackle the photovoltaic plant construction project with a significantly optimized execution time.



How a large-scale photovoltaic plant is built in record time

A solar-panel complex was completed a few months ago in the Sonoran Desert in Mexico. From a bird's-eye view, the Puerto Libertad photovoltaic plant looks like a large glass lake. Together, the panels are able to generate clean energy