Critical Minerals and Components for Power Grids

Power grids are the largest machines ever built, and the energy transition asks them to grow faster than at any time in decades. Electric vehicles, heat pumps, factories reshoring to the US and Europe and, above all, data centres for artificial intelligence are all adding load, while new wind, solar and battery capacity must be connected to it.

Every part of that build-out is made of critical minerals. Copper and aluminum carry the current, in high-voltage lines, underground cables and transformer windings. Silicon gives transformer cores their efficiency through grain-oriented electrical steel. Zinc protects transmission towers from rust, while lithium, graphite, phosphate and vanadium fill the batteries that balance supply and demand. Generation adds its own list: rare earth magnets in wind turbines, silver and tellurium in solar panels, uranium and zirconium in nuclear plants.

Stockatomics maps 60 critical minerals to power grids, from the conductors on the poles to the minerals inside the batteries and generators connected to them.

Grids need critical minerals to carry power, to transform it between voltages, to store it and, increasingly, to generate it.

Carrying power

Copper is the conductor of choice for cables, windings and substations, while aluminum carries most overhead transmission because it is lighter. Zinc galvanises steel towers and poles against corrosion, and lead still sheaths some underground and undersea cables.

Transforming and switching

Transformers depend on grain-oriented electrical steel, made with silicon, wrapped in copper or aluminum windings. Switchgear uses tungsten contacts and, in many designs, an insulating gas made from fluorspar.

Storing power

Grid-scale batteries are mostly lithium iron phosphate, which needs lithium, phosphate and graphite, with aluminum and copper foils. Vanadium flow batteries store power for longer periods, and lead batteries remain common for backup.

Generating power

Wind turbines use permanent magnets of neodymium, praseodymium, dysprosium and terbium with boron, solar panels use silver, silicon and, in thin-film designs, tellurium, and nuclear plants depend on uranium, zirconium and hafnium.

The grid's biggest supply risks are in volume rather than exotic materials. Copper and aluminum are needed in enormous quantities, and new copper mines take a decade or more to build. Transformers have become a global bottleneck, with long waiting times, partly because grain-oriented electrical steel is made by only a few producers; the United States has a single domestic maker.

Concentration matters most in storage and generation. China dominates battery manufacturing and graphite processing, as well as the rare earth magnets used in wind turbines, while uranium enrichment outside Russia is limited and fluorspar supply for switchgear gases is tight.

What that means for grids

• Utilities are ordering transformers and cable years ahead and standardising designs to speed up supply
• Governments are funding domestic transformer, cable and electrical steel production
• Grid investment plans increasingly depend on securing materials as much as on financing

As of October 2026, power grids are moving from a slow-growth industry to one of the fastest-growing sources of mineral demand. After years of flat electricity demand in many advanced economies, data centres, electrification and new industry are adding load, while renewables and storage reshape how power is generated and balanced.

What to watch

• Transformer and cable supply: long waiting times are spurring new factories and standardised designs
• Interconnection queues: projects waiting years to connect are pushing utilities to invest in transmission
• Storage everywhere: grid batteries are being built at scale, mostly lithium iron phosphate, with interest in long-duration alternatives such as vanadium flow
• Nuclear revival: life extensions, restarts and small modular reactors are bringing uranium and zirconium back into grid planning
• Copper versus aluminum: high copper prices are encouraging aluminum substitution where it is technically possible