Summary
- DG Matrix will integrate Skeleton’s fast-response storage with its Interport solid-state transformer platform.
- The proposed system converts medium-voltage AC to high-voltage DC while absorbing rapid GPU load changes.
- Protection, certification, maintenance, and equipment interoperability will govern commercial adoption.
DG Matrix and Estonia-headquartered Skeleton Technologies are combining solid-state transformers with fast-response energy storage for 800V DC data centre power systems.
The collaboration will integrate Skeleton’s GrapheneCBU800 and GrapheneBBU800 products across DG Matrix’s Interport platform. The proposed architecture converts medium-voltage AC directly into high-voltage DC, routes power among supply, storage, and load, and responds to rapid changes in GPU demand.
Interport CM accepts medium-voltage inputs from 12kV to 34.5kV, while other modules can be installed in the white space, grey space, or outdoors. Skeleton says its storage systems can respond across timescales ranging from microseconds to minutes.
Power quality joins the capacity problem
Large AI clusters create more than a requirement for additional megawatts. Their workloads can move rapidly between operating states, producing steep ramps and repetitive pulses that place stress on facility distribution and the upstream electricity network.
Conventional data centre designs manage continuity through transformers, switchgear, UPS systems, batteries, generators, and controls, often with several conversion stages between the utility supply and the computing equipment. DG Matrix’s architecture seeks to consolidate some of those functions while placing fast storage closer to the changing load.
Reducing conversion stages could lower electrical losses and equipment count, although the outcome will depend on the efficiency of the solid-state transformer across its operating range, the amount of supporting equipment still required, and the redundancy model chosen for each deployment.
Fast storage can absorb short-duration transients and bridge faults, but its energy capacity remains as important as its response speed. A system designed to handle a millisecond pulse serves a different purpose from a UPS expected to carry a load for several minutes, and neither removes the need for controlled shutdown or longer-duration generation during an extended outage.
DC protection becomes a design discipline
An 800V DC architecture changes the behaviour of electrical faults. Direct-current arcs do not pass naturally through a zero point, so breakers, isolation devices, detection systems, and maintenance procedures must interrupt and contain faults without allowing an event at one rack or bus section to propagate through the cluster.
Selective coordination will be particularly demanding where storage, utility supplies, and multiple loads share a software-controlled power platform. Protection must operate quickly enough to clear a fault while distinguishing it from the legitimate, rapid changes produced by the computing workload.
Maintenance strategy will also influence adoption. A more integrated power system may remove components, but it can concentrate several functions inside specialist equipment with a smaller pool of trained technicians and replacement parts. Operators will examine bypass arrangements, remote support, firmware control, cyber access, spares, and the ability to maintain one module without exposing adjacent capacity.
European projects will require certification against applicable electrical standards, grid codes, fire requirements, and local inspection regimes. The surrounding hardware ecosystem must mature at the same time, including compatible rack power shelves, connectors, busway, protection devices, storage systems, and controls.
DG Matrix has published an 800V DC technical paper describing the role it expects solid-state transformers to play. The partnership has not yet identified a commissioned European deployment, customer order, field-performance result, or independently certified end-to-end design.
Rising rack density is forcing the industry to reconsider a power chain developed around steadier loads and lower voltages. The commercial outcome will rest on whether 800V DC can be protected, maintained, and supplied with the same confidence operators expect from mature AC architectures.
