The transition to low-voltage direct current as the distribution architecture of the European AI data centre is not only a hardware change. It is a standards and ecosystem change being built in real time, with the active participation of the sector’s principal industrial actors. The OCP EMEA Summit 2026, held in Barcelona in April 2026, was where that process took its most visible step: the approval of the OCP white paper on Low Voltage DC Power Distribution as a contribution to the Open Data Center Ecosystem for AI, and the presentation of Schneider Electric’s five principles for 800 VDC adoption.

This article maps the emerging standards territory — who is writing the rules, what the rules are, and what the implications are for European power electronics manufacturers that want to take part in this market.

OCP DCF Power Distribution LVDC v1.0: the canonical document

The OCP Foundation’s DCF Power Distribution LVDC v1.0 white paper was approved on 29 April 2026, the first day of the OCP EMEA Summit in Barcelona. Its co-leadership corresponds to Eaton and ABB, the volunteer co-leads of the OCP Power Distribution Project.

The document’s operational definition delimits the perimeter of the entire conversation: LVDC (Low Voltage Direct Current) is defined as direct voltage equal to or below 1,500 VDC. The 800 V bus — the ±400 V of the Mt. Diablo specification — falls comfortably within that range. The document specifically addresses LVDC distribution as the interface between incoming Medium Voltage AC (MVAC, currently in the facility grey space) and rack compute in the IT white space.

Two sections of the document are especially relevant for power electronics manufacturers. Sections 4 and 8 focus on MVAC-to-LVDC conversion — either via a Solid State Transformer (SST) or via a combination of a conventional MV/LV transformer with an isolated or non-isolated AC/DC converter. These are exactly the stages of the sidecar in Architecture 1 (LV input) and of the sidecars in Architectures 2 and 3 (MV input) of the Schneider Electric roadmap.

The reliability targets set by the document are also highly relevant. For AI training data centres: 99.9% availability. For AI inference data centres: 99.999% availability. These two figures are not aspirations — they are design targets that define the required redundancy, maintenance protocols and MTBF requirements for every component in the chain, including sidecar converters.

Schneider Electric WP213: five principles for adoption

Schneider Electric’s white paper SPD_WP213_EN — 5 Principles for 800 VDC in AI Data Centers: Rack-level Architectures as the Immediate Enabler — published in March 2026, is the reference document of one of the world’s largest energy management manufacturers on the transition to 800 VDC. It identifies 800 VDC power racks — explicitly called sidecars in the abstract — as the immediate enabler of the transition.

The five principles the document proposes are the axes on which designers and operators should evaluate and adopt 800 VDC architectures:

• Architectural variations. There is no single 800 VDC architecture. The document distinguishes between localised distribution (sidecar), centralised distribution with LV converters and centralised distribution with SST — each with different time horizons, scales and levels of complexity.
• Ecosystem availability. The maturity of components — SiC rectifiers, WBG DC/DC shelves, connectors, manifolds, protection gear — is the variable that determines when and at what scale each architecture can be deployed.
• Protection coordination and earthing. The transition to 800 VDC introduces specific challenges in arc fault protection and earthing schemes — 2-wire vs. 3-wire DC — that call for standards review and dedicated protection coordination studies for high-voltage DC.
• Energy storage integration. Backup systems at 800 V change the sizing logic of the BBU and open the door to LIC or supercapacitor solutions connected directly to the DC bus, without an intermediate conversion stage.
• Operational execution. Operator training, service procedures in 800 VDC installations, fault management and diagnostic tools are a matter of deep operational change that is not solved by the choice of hardware alone.

The OCP × Current/OS alliance: an open standard for DC

The third vector of the standards ecosystem is the alliance between the OCP Foundation and Current/OS, formalised in December 2025. Current/OS is an independent, non-profit global partnership that promotes open standards for interoperable DC microgrids and is developing a DC standard and DC-certified products for buildings and installations.

The alliance was promoted by the volunteer co-leads of the OCP Power Distribution Project — precisely Eaton and ABB, the same companies co-leading the LVDC v1.0 white paper. Its stated objective is to combine OCP’s experience in open data centre hardware with the Current/OS standards for interoperable DC, creating what the announcements described as a vendor-neutral operating system for DC-powered data centres.

In addition, on 29 April 2026 — the opening day of the Summit — the OCP Foundation announced a new alliance with the Electric Power Research Institute (EPRI), aimed at integrating the dynamic management of AI data centres with grid services such as demand response, virtual power plants and frequency regulation. This is the grid services issue that Schneider Electric identified as one of the eight open topics of the 800 V sidecar.

IEC and the European standards landscape

The IEC landscape for LVDC is under active construction, with three standards families of direct relevance to the sidecar. IEC 62477 (Power Electronic Converter Systems) establishes the general safety requirements for power electronic converters, including the DC/DC conversion stages of the sidecar. IEC 62109 (Safety of Power Converters for Use in Photovoltaic Power Systems) provides a precedent for DC converter safety testing methodologies that can be applied by analogy to the data centre context. IEC 60364-8-1 (Energy Efficiency in Electrical Installations) addresses DC distribution architectures and is the most directly relevant standard for 800 VDC building-level distribution infrastructure.

The European standards gap regarding arc fault protection in DC systems above 400 V is particularly relevant: there is no harmonised European standard specifically addressing DC arc fault detection and interruption in the 800–1,500 V range. The OCP DCF LVDC v1.0 document acknowledges this gap explicitly. This is both a regulatory risk — installations may require case-by-case assessment by notified bodies — and an opportunity for manufacturers that develop and qualify arc fault protection solutions for the 800 VDC sidecar.

Implications for European power electronics manufacturers

The standards landscape described above has five direct implications for European power electronics manufacturers targeting the data centre market:

• Mt. Diablo compliance will become a commercial requirement within twelve to eighteen months, so the component qualification process needs to start now.
• Arc fault protection is an open technical and regulatory problem in which early movers can make a difference.
• Redfish + SCMI telemetry will be required at converter level by operators building on the OCP LVDC architecture.
• 99.999% availability targets for inference data centres impose MTBF and redundancy requirements consistent with railway and defence-grade power electronics.
• European traceability requirements under the EU Chips Act and the Cyber Resilience Act will progressively require documented supply chain provenance for critical infrastructure components, including data centre power electronics.