the world’s leading steelmaker and mining company. We offer a comprehensive range of building envelope and solutions with the aim to inspire the construction sector to build in smarter ways ArcelorMittal Building Solutions
— April 2026 The Energy & Solar Challenge in Polar Environments Main conventional PV issues ❌ External cabling Brittle below −40°C — arc flash risk ❌ Aluminium frames Ice accumulation, thermal bridges ❌ Fixed module sizes Field cuts compromise waterproof seals ❌ Mounting systems hardware Fatigue under katabatic winds / watertightness risk ❌ 3-steps installation Diffiicult in 8-12-week polar summer windows "Conventional PV was designed for temperate climates and bolted onto buildings as an afterthought."
Cannot be disclosed, used, or reproduced without prior written specific authorization of ArcelorMittal CONFIDENTIAL – Privileged Information - ArcelorMittal proprietary information Page 5 Confidential 21/05/2026 Custom length — fit to size TOPCon cells – 25,4% efficiency Insulation thickness range Only solar weight addition Faster, Lighter, Smarter - Prefabricated Photovoltatic Sandwich Panel + 2.5 kg/m² 200 Wp/m² 2m – 12 m 40–140 mm X-Carb® low-carbon steel | Hairexcel® coating — durable in aggressive environments > 25 % CO₂ reduction vs. conventional solar roof
Cannot be disclosed, used, or reproduced without prior written specific authorization of ArcelorMittal CONFIDENTIAL – Privileged Information - ArcelorMittal proprietary information Page 6 Confidential 21/05/2026 Why Technology ? No external cabling All electrical connections inside the building — no embrittlement at −60°C, no arc flash, no EM interference with scientific instruments No frame, no mounting Aerodynamic uninterrupted profile — no ice traps, no fatigue under whigh katabatic winds, no corrosion points Fit-to-size manufacturing Panels from 2m to 12m at exact dimensions — zero field cuts, zero seal compromise, minimum seams = maximum envelope integrity 50% lighter system +2.5 kg/m² vs +15 kg/m² for conventional BIPV — critical for polar logistics where every kg has an extreme cost Single-intervention install Roof + solar in one operation, 40% faster — feasible within a 8-12 weeks polar summer deployment window Infinitely recyclable steel At end-of-life: recoverable steel scrap — aligned with Antarctic Treaty environmental obligations
Cannot be disclosed, used, or reproduced without prior written specific authorization of ArcelorMittal CONFIDENTIAL – Privileged Information - ArcelorMittal proprietary information Page 7 Confidential 21/05/2026 Mastered Industrial Process — Contrisson, France 6,000 m² facility Helexio® factory — Contrisson (Meuse), France R&D mindset 15 patents. We solve problems that have no existing solution. EU-funded Supported by EU Innovation Funds — European Green Deal
Cannot be disclosed, used, or reproduced without prior written specific authorization of ArcelorMittal CONFIDENTIAL – Privileged Information - ArcelorMittal proprietary information Arctowski Polar Station — Our Polar Experience Arctowski Polish Antarctic Station — Built 2022 | King George Island, Antarctica Specific junction developed for curved panel-to-panel connection What we demonstrated → ArcelorMittal steel envelope panels perform in polar environments → Custom junctions can be engineered for curved & complex architectures → Fit-to-size prefabrication adapts to specific polar station geometries → The R&D capability to go further — now with integrated solar
Cannot be disclosed, used, or reproduced without prior written specific authorization of ArcelorMittal CONFIDENTIAL – Privileged Information - ArcelorMittal proprietary information Page 9 Confidential 21/05/2026 Helioroof® Technology @ The Andromeda Earth Observatory Let the roof of Andromeda not only be a shelter. Let the “sun at noon tan us” — and be the power plant
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