Cegasa, Skeleton Technologies open new factories boosting Europen battery manufacturing

Spain’s Cegasa Energía has announced a major expansion of its production capacity with the launch of a new manufacturing plant in Vitoria-Gasteiz. The new facility will initially produce 600 MWh per year by February 2026, with plans to reach a total capacity of 1.8 GWh per year by 2027.

To accelerate time to market and secure a reliable cell supply, Cegasa has signed a technology partnership with China’s EVE Energy, one of the world’s leading manufacturer of lithium iron phosphate (LFP) cells for battery energy storage systems (BESS).

“This agreement allows us to expand rapidly while maintaining a solid foundation,” said Iñigo Atutxa, CEO of CEGASA Energía. “It strengthens our role as a European leader in BESS manufacturing while driving local technological and industrial growth.”

The expansion is driven in part by demand from the Spanish Institute for Energy Diversification and Saving (IDAE) through its ERDF co-financed project calls, which have served as a key catalyst for the company’s growth.

In May 2026, CEGASA will deliver its first BESS system under the IDAE program, the Burriana project in Castellón, developed with Corporate Solar Holding and Beavier Photo Power, featuring a total storage capacity of 40 MWh.

Meanwhile, in Finland, Skeleton Technologies has officially opened its 1 GW SuperBattery factory in Varkaus, Finland, following a total investment of €50 million. The new facility is described as “Europe’s first factory producing high-power batteries for AI data centers”, while specilizing in industrialization of backup power systems for mission-critical computing and emerging sectors such as nuclear fusion.

By localizing advanced battery production in Finland, Estonia-based Skeleton aims to strengthen European manufacturing independence, support the growth of AI infrastructure, mobility, and grid stability, and reduce reliance on global supply chains.

“AI, mobility, and the grid of the future all require extreme power, reliability, and sustainability,” said Taavi Madiberk, CEO and co-founder of Skeleton Technologies. “Our Varkaus factory is a cornerstone for sovereign European AI infrastructure. Elon Musk has said batteries are key for training AI models, and he is right. We need to push performance globally while ensuring the digital revolution is powered responsibly and independently.”

The Varkaus SuperBattery factory site, formerly operated by European Batteries Oy, one of the pioneer’s in battery manufacutuing in Europe, is being revived by Skeleton’s investment.

Skeleton’s SuperBattery technology is powered by CBMM’s NBXCELER™ niobium oxides, which are used as anode materials, enhancing battery safety, performance, and lifespan. “Niobium plays a key role in shaping a more sustainable future,” said Ricardo Lima, CEO of CBMM. “Our partnership with Skeleton demonstrates how niobium can make AI infrastructure safer, longer lasting, and more efficient.”

Skeleton’s super-batteries are designed to bridge the gap between supercapcitors and conventional lithium-ion batteries. They can charged in less than 90 seconds and support up to 50,000 cycles. They do not use cobalt, nickel, graphite, or copper and are inherently safe – they do not go into thermal runaways.

The company currently employs more than 65 people in Finland and expects to grow to over 200 employees by 2029.