Transformer demand continues to grow as utilities expand networks, connect renewable generation, support data centre growth and strengthen ageing infrastructure. While investment in new assets remains essential, many organisations are asking a different question before placing another order: can an existing transformer continue delivering value? 

The answer is rarely straightforward. 

For asset managers, engineers and procurement teams, the decision to repair, refurbish or replace has become one of the most important strategic choices in grid planning. Every option carries different implications for reliability, project timelines, capital expenditure and long-term operating costs. 

Why this conversation matters now 

Lead times for new transformers remain significantly longer than many utilities would like. Manufacturers continue to manage strong order books while balancing material availability, skilled labour shortages and testing capacity. At the same time, network operators are under pressure to energise new renewable projects, strengthen transmission infrastructure and improve grid resilience. 

Waiting for a new transformer is not always the most practical solution. 

In many cases, extending the life of an existing asset can reduce delivery risk while helping operators meet project deadlines. The challenge is understanding when refurbishment provides genuine long-term value and when replacement is the better investment. 

Looking beyond age 

A transformer's age tells only part of the story. 

Operational history, loading profile, maintenance records, insulation condition, dissolved gas analysis, thermal performance and previous fault history all contribute to a much clearer picture of asset health. Two transformers commissioned in the same year may have vastly different remaining service lives depending on how they have operated. 

Modern diagnostics are helping operators move away from time-based replacement programmes towards condition-based asset management. This allows investment decisions to focus on actual performance rather than assumptions. 

When refurbishment makes sense 

Refurbishment can be an effective option where the core structure of the transformer remains in good condition. 

Projects may include: 

• Insulation replacement 

• Cooling system upgrades 

• Tap changer refurbishment 

• Bushing replacement 

• Monitoring system installation 

• Modern protection equipment 

These interventions can improve reliability, extend operational life and introduce digital monitoring capabilities that were not available when the transformer was originally installed. 

For utilities managing large fleets of ageing assets, refurbishment can also reduce capital expenditure while improving network resilience. 

When replacement delivers greater value 

There are situations where replacement is the more effective long-term decision. 

Older transformers may struggle to meet today's operating conditions, particularly where renewable integration, fluctuating loads or changing demand profiles create stresses that were never anticipated during the original design. 

New transformers can offer: 

• Lower losses 

• Improved thermal performance 

• Enhanced monitoring 

• Better efficiency 

• Reduced maintenance requirements 

• Greater compatibility with modern digital substations 

Where future demand is expected to increase significantly, replacement may provide the greatest lifetime value despite higher upfront investment. 

The role of remanufacturing 

Remanufacturing is becoming an increasingly important part of the transformer value chain. 

Rather than viewing equipment as either operational or obsolete, manufacturers and specialist service providers are finding opportunities to recover valuable materials, rebuild critical components and return transformers to service with renewed performance. 

This approach supports both operational resilience and more efficient use of materials such as copper, electrical steel and insulation, which remain under pressure across global supply chains. 

As demand continues to outpace supply in many markets, remanufacturing is becoming less of a niche service and more of a strategic capability. 

Building better decisions through collaboration 

The strongest asset strategies rarely happen in isolation. 

Utilities, OEMs, repair specialists, component suppliers and testing experts all bring valuable perspectives to refurbishment and replacement decisions. Earlier collaboration helps identify technical constraints, reduce delivery risks and improve lifecycle planning. 

Events such as CWIEME Berlin create opportunities for these conversations to happen face to face. Asset managers can compare technologies, discuss refurbishment approaches with specialists and evaluate new manufacturing capabilities alongside existing repair solutions. 

As the industry continues to expand Europe's electricity networks, there is unlikely to be a single answer for every transformer. 

Some assets will justify refurbishment. Others will require replacement. Increasingly, the organisations that make the best decisions will be those combining technical evidence, operational experience and collaboration across the value chain. 

For utilities planning the next generation of grid investment, knowing when to repair, refurbish or replace may become just as important as deciding what to buy next.