The launch of the Carbon Border Adjustment Mechanism (CBAM) on January 1 has introduced a subtle yet significant challenge to Europe’s green energy ambitions: the cost and availability of raw materials. While CBAM is officially a climate policy designed to level the carbon playing field between domestic and foreign producers, its most tangible impact is not on emissions reporting—it’s on the physical supply chains that underpin the continent’s clean energy transformation.
Europe’s decarbonization goals are fundamentally material-intensive. Wind turbines, solar farms, electrical grids, batteries, hydrogen electrolysers, and electric vehicle infrastructure all require vast quantities of steel, aluminium, copper, and other specialised inputs. These materials are not just components—they define capital expenditure, construction timelines, and the economic feasibility of green investments. Any policy that changes the cost of these materials directly reshapes the economics of Europe’s energy transition.
Steel: The Backbone of Renewable Infrastructure
Steel remains central to Europe’s energy strategy. From wind turbine towers and nacelle frames to offshore foundations, solar mounting systems, substations, and transmission pylons, steel is everywhere. CBAM now imposes a carbon-related cost on imported steel unless it meets low-emission production standards.
In theory, this should give domestic European steelmakers an advantage. In practice, European steel production is hampered by some of the highest electricity and gas prices in the world, meaning even “protected” domestic steel remains expensive. Renewable developers face higher turbine and balance-of-plant costs, inflating CAPEX for wind and solar projects already competing under tight auction pricing.
Aluminium: Lightweight but Costly
Aluminium is essential for solar frames, cables, power electronics housings, and grid components due to its lightweight and corrosion-resistant properties. Yet aluminium smelting is extremely energy-intensive. CBAM increases the cost of imported aluminium, but it doesn’t solve the competitiveness gap faced by European smelters operating under high electricity prices. Downstream manufacturers of solar panels, inverters, and grid hardware are left with rising input costs and no guarantee of secure domestic supply.
Copper: The Silent Driver of Electrification
Although copper is not yet directly covered by CBAM, its cost is affected indirectly through the energy-embedded costs of semi-finished products. Europe’s electrification strategy—covering renewables, grids, electric vehicles, and heat pumps—requires a significant increase in copper usage. Grid upgrades alone account for a substantial share of projected copper demand, meaning that any price inflation in steel or aluminium has knock-on effects for copper-intensive systems, raising the overall cost of electrification and grid expansion.
Batteries and Critical Minerals: A Chain Reaction
Europe’s battery strategy relies on scaling domestic production of cells, modules, and systems to support renewables and electric mobility. Critical minerals like lithium, nickel, cobalt, and graphite are outside CBAM’s scope, but battery manufacturing still depends heavily on steel and aluminium for casings, racks, and thermal management systems. Carbon-adjusted costs on these materials directly increase the cost of energy storage solutions, which are already lagging behind renewable deployment in many regions. Higher material costs risk delaying storage projects, reducing grid flexibility, and increasing renewable curtailment.
Hydrogen systems—electrolysers, pipelines, compressors, and storage vessels—are extremely steel-intensive, often requiring specialized grades. Europe’s hydrogen plans assume large-scale deployment over the next decade. If CBAM raises steel costs without boosting domestic supply competitiveness, hydrogen projects could become expensive showcase initiatives rather than scalable solutions.
The Big Picture: Cost Pressures and Strategic Risks
Across all sectors, CBAM introduces a structural cost increase into Europe’s green energy framework. Renewable targets, grid expansion plans, and industrial decarbonization roadmaps are usually based on historical cost curves. CBAM injects price uncertainty into core materials, forcing developers, manufacturers, and investors to consider energy market volatility, interest rates, and carbon-adjusted material costs simultaneously.
From an industrial policy perspective, this creates a contradiction: the EU wants to localize clean-tech manufacturing while controlling emissions, but raising material costs without ensuring energy affordability or supply security may squeeze domestic producers. Higher input costs for manufacturers translate to higher project costs for renewable developers and, ultimately, higher electricity prices for consumers.
Global competition adds another layer of complexity. Asian producers often benefit from integrated supply chains, lower energy costs, and economies of scale. If European-made wind turbines, batteries, or grid equipment become structurally more expensive due to CBAM, the continent may end up importing more finished clean technologies, undermining the very local manufacturing the policy intends to protect.
The key takeaway is not that decarbonizing materials should be abandoned—it’s that sequencing and integration are critical. A green energy strategy dependent on massive material deployment cannot function efficiently if supply chains are destabilized by cost shocks. Without parallel measures to ensure affordable industrial energy, scale low-carbon material production, and stabilize investment conditions, CBAM risks becoming a bottleneck rather than a catalyst for Europe’s energy transition.
As Europe moves from target-setting to industrial-scale execution, the material dimension of CBAM deserves far greater attention. The challenge is not just higher costs, but aligning climate ambitions with industrial realities—ensuring that Europe’s green transition is both ambitious and economically sustainable.
