As AI racks head toward a megawatt each, the industry is moving to 800-volt DC distribution. The direction is endorsed; the standard itself is not yet settled. The Direct Power Alliance is the neutral consortium convening the whole chain — generation, storage, distribution, and the rack — to define it in the open.
Rack density has climbed from roughly 10 kW to over 120 kW and is heading to a megawatt. At that scale, the conventional AC distribution chain becomes the bottleneck — every conversion stage is lost power, lost copper, and lost floor space. Native 800VDC removes conversion stages end to end. NVIDIA and the major hyperscalers, the latter through the Open Compute Project, have endorsed the direction. What remains open is the standard itself.
800 V monopolar versus ±400 V bipolar. The choice shapes every connector, converter, and protection device built to it.
DC arc faults have no natural zero-crossing. The protection scheme and the safety case are not yet standardized.
The UL and IEC listings, the codes, and the AHJ path for native-DC equipment do not yet exist. Someone has to write them.
Rack-level work is already underway. The unclaimed ground, and the harder problem, is the rest of the chain: getting native-DC generation, storage, and distribution to design and build toward the same bus. The Alliance convenes generation through load as one effort, on a neutral footing no single vendor can offer.
The internet became a standard because its governance belonged to no one company. The Alliance applies that model to data-center power: an open process, a published reference architecture, and a method of rough consensus and running code — so competitors, regulators, and hyperscalers can all join.
A standard is only real once something runs on it. An islanded generation-to-rack demonstrator proves the architecture end to end — and lets others test their equipment against a working 800VDC bus, the step that turns drafts into an adopted standard.
The open questions map directly onto the Alliance's agenda. Each group owns a seam of the standard and leaves the products competitive.
Native-DC generation — fuel cells, linear and reciprocating gensets, solar, and DC-coupled storage — designed to feed the bus directly, and sized to scale.
The voltage convention, the bus topology, and the connector and physical-layer interfaces that everything else builds to.
DC fault detection, arc-flash mitigation, grounding, and the safety case that makes 800VDC deployable in a data hall.
The listing path, code language, and certification framework — coordinated with UL, IEC, IEEE, and the AHJs.
The standard is being written now, ahead of the 2027 production ramp and the next code cycle. Founding members shape the reference architecture, seat the working groups, and get their equipment into the validated design. Equipment makers, operators, research institutions, and standards bodies are all welcome.
Contact the Alliance