French energy utility Engie is set to invest nearly €100 million (US$114 million) to develop a 155MW solar photovoltaic (PV) project at its Castelnou power station in Spain’s Aragon region, building a new hybrid energy facility integrating renewable solar power and flexible conventional power capacity.

Located in Teruel province, the large-scale solar development will cover around 360 hectares and deploy more than 284,000 solar modules. Designed as a hybrid power complex, the project pairs new solar generation with the site’s existing dispatchable thermal capacity, creating a complementary operational model to boost renewable energy integration and strengthen grid stability.

Yolanda Valles, Director General of Energy and Mines of Aragon, highlighted the project’s regional economic and industrial value. “The Castelnou plant is an example of the value generated by collaboration between industry and institutions for the economic and social development of our region,” Valles stated. “This project has been a driver of employment and progress, and today it also represents Aragon’s ability to position itself as a benchmark in innovation and energy competitiveness in the current context of global energy transition.”

Engie emphasized that the hybrid configuration leverages the complementary operating characteristics of solar power and flexible thermal assets. The integrated facility will facilitate greater integration of renewable electricity into the power grid, stabilize grid operation, and lift the proportion of green energy supplied from the Castelnou site.

The new 155MW solar scheme further expands Engie’s renewable footprint in Spain. Currently, the company operates approximately 1.8GW of renewable energy capacity across the country, with an additional 3.5GW of clean energy projects under active development.