December 16, 2025: Skeleton Technologies has formally opened its latest European ‘SuperFactory’ site, in Germany, at a cost of around €220 million ($258 million).

The Leipzig facility manufactures the firm’s graphene-based supercapacitors and follows the opening of a plant in Finland, as revealed by Batteries International last month.

Skeleton announced the Leipzig opening on December 1, saying the site already supplies Siemens, General Electric and Hitachi Energy, serving European electrical grids and “major US hyperscalers” for AI infrastructure.

Supercapacitors from Skeleton use no lithium, cobalt, manganese, or other critical raw materials, and are based on its proprietary ‘curved graphene’ tech.

Skeleton said its high performance GrapheneGPU system has the ability to reduce datacenters’ AI energy consumption by up to 45% — tackling a key challenge for expansion of AI systems.

Leipzig is designed for an annual output of up to 12 million cells.

CEO Taavi Madiberk said: “Skeleton’s systems are already used by German transmission operators as a last line of defence, a real safety belt for a grid increasingly powered by renewables.”