ALY-DC-DSX-TWIN · Behind-the-Meter AI Factory · Perth & Kinross

405 MW of GB300 compute,
powered by wind, formed by batteries.

A full digital design portal for the Alyth AI Factory — 186,624 Blackwell Ultra GPUs across seven liquid-cooled data halls, a 600 MW / 2,400 MWh grid-forming BESS, a private wire from Seagreen offshore wind, and a 900 MW grid connection — all behind a single fiscal meter at the SSEN Alyth 400/132 kV substation. Built on the interaction model of the NVIDIA Omniverse DSX Blueprint for AI factories.

Factory KPI Board

Headline metrics in the DSX KPI framework — power, compute, efficiency and resilience. Figures are first-pass design targets.

Energy Flow — Normal Operation (Mode 1)

Behind the meter: Seagreen supplies the campus over the private wire, the grid-forming BESS holds the bus, and the 900 MW grid connection stands by at zero-power setpoint. Explore all four operating modes on the Power page.
SEAGREEN OFFSHORE WIND Firth of Forth · Constellation PPA ≈450 MW private wire · aspirational SSEN GRID · 900 MW standby · 0 MW setpoint · 400/132 kV FISCAL METER — BEHIND-THE-METER BOUNDARY 33 kV SITE BUS GRID-FORMING BESS 600 MW / 2,400 MWh V/f reference · 12 × 50 MW LFP units 7 × GB300 NVL72 DATA HALLS 405 MW IT · 186,624 GPUs 2,592 liquid-cooled racks · 3.7 ZFLOPS FP4 closed-loop cooling · PUE 1.12 + 50 MW cooling & auxiliaries = 455 MW steady facility draw 465 MW 455 MW → IT + cooling 10 MW float

Design Modules

Delivery Phasing

Why Behind-the-Meter

One meter, one agreement

The data centre is a load inside the consented BESS site — not a new grid customer. The existing 900 MW BCA (Gate 2, signed) is the connection; SSEN/NESO see only net site flows at the 400/132 kV fiscal meter. No new queue position, avoiding today's 7–10 year timelines for transmission-connected load.

Private wire, zero network charges

The Seagreen private wire is a dedicated cable that never touches the public network — no TNUoS, BSUoS or DUoS. Combined with BESS arbitrage managed by Constellation Energy, the campus targets firm, low-carbon power at a structurally lower cost than grid supply. Commercial terms are aspirational and caveated throughout.

Grid-forming resilience

The 600 MW BESS runs in grid-forming mode — it sets voltage and frequency on the 33 kV bus. The campus islands from a grid fault in under 100 ms and keeps 405 MW of GPUs training from wind + storage, with over 6 hours of full-load autonomy in the worst case.

Climate as infrastructure

Alyth's 8.2 °C annual average delivers free cooling for more than 75% of the year. Closed-loop liquid cooling with dry coolers means near-zero water consumption (WUE ≈ 0.05 m³/MWh) — no cooling towers, no abstraction licence, PUE 1.12.

Status. Everything in this portal is a first-pass concept for internal review and planning strategy — not for construction. The Seagreen private wire is an aspiration pending commercial agreement. All ratings and schemes require validation by the appointed professional team (electrical, MEP, planning) before submission. The interaction model, KPI framework and GB300/GB200 platform data are merged from the NVIDIA Omniverse DSX Blueprint.
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