Minera El Tesoro Mining Group and Soitec establish CPV solar-energy pilot plant for mining operation in Chile

FRANCE & CHILE: Minera El Tesoro (MET), part of one of the largest mining groups in Chile, has built the first pilot plant in South America with Soitec Solar technology, installing four of its highly efficient concentrator photovoltaic (CPV) systems at a site in Chile’s Sierra Gorda district to provide renewable energy for a remote copper-mining operation.

In addition to achieving the highest energy-generating efficiency, Soitec’s CPV systems feature very robust glass-glass technology, particularly well suited for hot and arid environments. This design offers the lowest degradation and doesn’t need any water for cooling, making it perfectly suited for this installation within the driest desert in the world.

The four CX-S420 systems installed for MET use Soitec Solar’s leading-edge Concentrix CPV technology and two-axis tracking systems to generate a total installed capacity of 64 kWp. In addition to providing electricity for the site’s data center, this installation serves as an important research and demonstration platform for MET using innovative and environmentally friendly solar technologies, designed to reduce carbon footprints and optimize energy costs in hot, arid locations with high direct normal irradiation (DNI).

To that effect, on May 22 MET and Soitec signed a memorandum of understanding to leverage the experience gained from this pilot plant to facilitate their respective plans of developing additional projects with CPV technology in Chile.

“We are very pleased to have the opportunity to support MET in its relentless work to deliver solar power and a more sustainable and efficient supply of energy to Chile,” said Fabio Mondini, VP, geographical expansion with Soitec’s Solar Division.

“This demonstration site is an important step in our commercial efforts in a region where we have high ambition. Chile’s energy demand is growing and should lead to a doubling of the installed capacity in the next few years, particularly in the northern part of the country, which has the highest DNI and strong mining-sector electricity demand.”

“Considering our location within the Atacama desert, one of the highest irradiation regions on earth, we are very pleased to be working with one of the CPV leaders on this pilot installation and to have the opportunity to use Soitec’s CPV technology in real-world conditions, generating clean and sustainable power to our mining operations,” said Martin Brown, environmental superintendent at Minera El Tesoro.

“As the demo units feed energy to our mine’s internal grid, we are testing Soitec’s technology in the harshest conditions, and at the same time, assessing the possibility of incorporating renewable and clean energy on a larger scale in the future.”

In 2012, Chile’s renewable energy agency Centro de Energias Renovables (CER) published its National Energy Strategy ENE 2012-2030, in which it announced the approval of more than 3.1 GW in solar-energy projects to address issues such as possible power shortages, price increases for fossil fuels, Chile’s enormous economic growth and increasing demand for electricity. As a country, Chile has the world’s highest solar irradiation and is expected to be the site of some of the world’s first large-scale solar projects.

CPV is the most efficient technology in the photovoltaic industry, achieving current module efficiencies of 30 percent – approximately twice that of conventional photovoltaic technologies. Soitec’s CPV modules use a durable glass-glass design and Fresnel lenses to concentrate sunlight 500 times onto small, highly efficient multi-junction solar cells. By using dual-axis tracking, Soitec’s systems provide high, constant power output throughout daylight hours.

In addition, the company’s systems are resistant to energy losses in high temperatures and achieve passive cooling without water consumption, offering competitive advantages in regions with high DNI such as northern Chile. Soitec has installed its CPV technology in 18 countries to date.