Ignis, Engie sign long-term battery storage deal in Spain

Engie and Ignis have signed a long-term flexibility purchase agreement covering several battery energy storage (BESS) projects across Spain, with a total installed capacity of 625 MWh.

Under the terms of the agreement, Engie gains access to the flexibility provided by the batteries in the day-ahead market over a 10-year period, while Ignis secures the revenues generated by the assets. Ignis will also operate the batteries and optimize their participation in the electricity system’s balancing services.

The batteries are scheduled to enter operation in 2028. They will store energy during periods of peak renewable generation and release it when demand requires, reducing exposure to electricity market volatility.

In 2025, Ignis became the first independent operator in Spain to manage a stand-alone battery in the market.

Santiago Bordiú, head of Ignis Energy, said the deal lets the company continue “maximizing the value of these assets thanks to our expertise in balancing the electricity system,” alongside “securing recurring revenue with a top-tier counterparty like Engie.”

Jean Nicolas Lejeune, managing director of Engie’s supply and energy management division for Iberia, said the agreement strengthens Engie’s position in Spain’s battery storage market, adding that the company is using its energy management platform to integrate batteries and bring their flexibility into the market.