Electrification is driving investment into power grids at a scale the electrical manufacturing industry has been preparing for. But as orders rise, a harder question is coming into focus: can manufacturing capacity keep pace? 

Recent results and investment announcements point to the pressure building across the sector. Siemens Energy reported record orders, revenue and profitability in its latest quarter, with electricity demand continuing to drive demand for its products. GE Vernova has also announced further investment in its US grid equipment manufacturing capacity, while Tempel is investing in new transformer core production. 

These are individual announcements, but together they reflect a much bigger shift. Grid expansion is translating into demand for physical equipment, and that demand runs through the entire electrical manufacturing supply chain. 

Transformer capacity starts long before final assembly 

For transformer manufacturers, increasing output isn't simply a matter of adding another production line. 

Capacity depends on the availability of electrical steel, copper, conductors, insulation, cores and other components. It relies on winding machinery, automation and skilled engineers. Then there is testing. 

High voltage and impulse testing can create queues inside factories even when other stages of production have capacity available. Increasing assembly output without increasing testing capacity can simply move the bottleneck further down the line. 

CWIEME Berlin's industry research identifies these interconnected pressures clearly. Transformer OEMs are managing long and fragile supply chains for critical materials, skilled labour shortages, testing constraints and quality risk, alongside the challenge of investing in capacity when future demand is difficult to predict. 

The result is a capacity question that extends far beyond transformer manufacturers themselves. 

More factories need more materials, machinery and people 

As manufacturers invest to meet demand, their suppliers must scale with them. 

More transformers require more electrical steel and copper. More factory throughput can require new winding systems, automation and testing equipment. Higher production volumes also increase the importance of repeatable processes and quality control. 

That makes capacity expansion an issue for the entire value chain. 

CWIEME Berlin connects raw materials, processed materials, components and machinery with transformer manufacturers and the wider transmission and distribution sector. Each part has a role in determining how quickly additional grid equipment can reach projects. 

And speed cannot come at the expense of reliability. Transformers are long-life infrastructure assets, so increasing throughput while maintaining manufacturing quality remains critical. 

Collaboration needs to start earlier 

There is another capacity lever that doesn't require building a new factory: better alignment between grid operators, OEMs and suppliers. 

Operator specifications can drive significant customisation, even across equipment intended for similar applications. For manufacturers, that adds engineering time and makes repeatable production harder. 

Greater standardisation could help reduce those pressures. Earlier visibility of future grid requirements could also give manufacturers and their suppliers more confidence to invest in capacity, equipment and people. 

Our audience research highlights earlier operator and OEM collaboration, standardised platforms, flexible production systems and design for manufacture as practical opportunities to reduce delivery risk. 

From grid ambition to factory output 

Europe's grid expansion will ultimately depend on more than investment commitments and project pipelines. 

It depends on factories. 

It depends on whether materials arrive when they are needed, whether machinery can increase throughput, whether testing capacity grows alongside production and whether manufacturers can find the skills required to deliver at scale. 

The grid equipment market has demand. The next challenge is turning that demand into reliable manufacturing capacity across the value chain. 

That is where closer collaboration between grid operators, OEMs, materials suppliers, component manufacturers and technology providers will matter most.