Skeleton Technologies, the Estonian energy storage company whose supercapacitors and SuperBattery are built on its patented Curved Graphene material, has announced a technical and commercial partnership with US solid-state transformer maker DG Matrix. The collaboration targets the AI data center sector's shift toward 800V DC power architectures.
Under the agreement, Skeleton will integrate its high-power, fast-response energy storage systems across DG Matrix's Interport multi-port solid-state transformer (SST) platform. The joint solution addresses one of the prominent challenges in modern AI facilities: the extreme, repetitive pulse loads generated by GPU clusters, which can exceed the dynamic response capabilities of both the power grid and conventional UPS and battery systems. Skeleton's storage is engineered to respond across timeframes ranging from microseconds to minutes, absorbing short-duration peak loads before they propagate to upstream electrical infrastructure, while DG Matrix's Interport platform routes power in real time across AC and DC sources, storage assets and compute loads at multiple voltage levels.
The collaboration spans several Interport products: the Interport CM medium-voltage skid, which converts 12–34.5 kV AC directly to high-voltage DC; the Interport CL sidecar, which mitigates GPU pulse loads directly in the data hall; and Interport Flex, an outdoor product that can be paralleled into DG Matrix's Interport 360 end-to-end architecture. Together, the companies say the integrated system can better manage transient power events, support fault ride-through and provide backup power for demanding AI workloads.
The partnership announcement is framed around power architecture and grid stability rather than materials, and does not specify which Skeleton storage product will be deployed. Skeleton's graphene-based technology (its supercapacitors and SuperBattery hybrid) rely on Curved Graphene - a proprietary carbide-derived material that Skeleton says increases energy density compared to conventional materials, and which underpins the data center products it has rolled out over the past year, including GrapheneGPU and GrapheneUPS.
Taavi Madiberk, CEO and co-founder of Skeleton Technologies, described the move to 800V DC as one of the most significant evolutions in the data center industry, arguing that fast-acting energy storage is now essential to keep GPU bursts from destabilizing electric grids. DG Matrix has separately partnered with PowerSecure to support next-generation power infrastructure for AI data centers and wider electrification projects.
