How the cable industry is driving sustainability and renewable energies forward

The Invisible Foundation: Why Cables Are Essential for Sustainable Energy

When we talk about renewable energy, most people immediately think of wind turbines, photovoltaics, or maybe hydrogen. What rarely comes to mind: cables. Yet they are the crucial connecting element in the energy system of the future. They link decentralized energy sources, transmit electricity over long distances, ensure voltage stability, and reduce transmission losses.

Whether in cities, open fields, or under the sea: energy needs to be transported—efficiently, safely, and in an environmentally friendly way. That’s exactly what high-quality underground cables are for, combined with smart grid technology. Only this infrastructure makes it possible to turn wind and sun into real benefits for households, businesses, and industry.

The challenge lies in scaling: new energy sources are coming online faster than ever before. The demand for modern cable systems is growing just as rapidly—along with the requirements for materials, installation techniques, and sustainability standards.

Sustainability Through Technology: Cables as Ecological Levers

The cable industry doesn’t just deliver products. It provides systems, concepts, and solutions that actively contribute to CO₂ reduction. Modern underground cables, for instance, are increasingly replacing overhead lines – with many advantages:

• reduced land usage

• no interference with the landscape

• less risk from weather influences

• longer lifespan with lower maintenance

Moreover, many materials in today’s cables are significantly more sustainable than they were just a few decades ago. Aluminum and copper from secondary sources reduce the demand for primary raw materials.

This is not just green wishful thinking, but a reality for many cable manufacturers and specialized suppliers such as KLZ. Our cable types – including tried-and-tested cable types such as NA2XS(F)2Y and NAYY for wind and solar parks and classic underground cable applications – are not only efficient, but also designed for durability and, to a large extent, recyclability.

Want to learn more about how the cable industry is committed to sustainability? Click here!

Expanding the Grid Alongside Demand: Challenges and Opportunities for the Cable Industry

The energy transition brings not only clean energy but also major demands on grid infrastructure. Electricity generated decentrally must be centrally distributed—or passed along decentrally. This means:

• more lines in rural areas

• higher performance requirements due to e-mobility and heat pumps

• more complex routing in densely populated areas

• higher requirements for installation methods such as trenchless construction

All of this can only be achieved with a well-prepared cable industry—in other words, with experts who not only produce and deliver, but also think ahead. KLZ, for example, relies on intelligent availability, clear supply chains, and deep understanding of the specific challenges in wind and solar projects.

Whether it’s medium-voltage cables connecting wind turbines to substations or high-voltage cables for long-distance transmission: the right cable selection, combined with the appropriate accessories (joints, terminations, fittings), determines the cost-effectiveness and sustainability of the entire project.

The Circular Economy Is Coming – Even Underground

Sustainability doesn’t end with the installation of a cable. Dismantling and recycling are also crucial topics. Especially with infrastructure designed to last decades, it’s worth taking a second look:

• What happens after many decades of operation?

• Can the materials be returned to the production cycle?

• What about the disposal of insulation materials?

The good news: the cable industry is thinking ahead. Many providers now rely on removable systems, single-type materials, and logistical take-back systems for old materials. Projects focusing on low-CO₂ copper production and regranulation of insulating materials show progress: : the industry is moving forward.

KLZ – The Right Partner for a Green Energy Future

While many talk about sustainability, we live it – and have for years. KLZ has long focused on a well-thought-out, resource-efficient supply chain, the selection of high-quality, long-lasting cable types, and close collaboration with clients in the wind and solar energy sectors.

Our logistics strategy avoids bottlenecks, while our proximity to the project locations (e.g. through our logistics center near the Dutch border) guarantees short distances and fast response times. Whether medium-voltage, high-voltage or low-voltage cables – we supply what is needed.

From NAYY 0.6/1.0 kV to NA2XS(F)2Y as medium-voltage cable to N2X (FL)KLD2Y 64/110 kV. And we only stop when the project is up and running.

Those planning sustainable projects don’t just need cables – they need a cable supplier who thinks ahead. Welcome to KLZ.

Conclusion: Sustainable Energy Needs More Than Technology – It Needs Connection

Cables are no side note – they are the nervous system of the energy transition. They connect ideas with reality, sources with consumers, visions with feasibility. And they do so discreetly, reliably, and for decades to come.

Anyone thinking about renewable energy today should also consider what keeps that energy moving: the cable industry. It doesn’t just deliver copper and insulation – it provides solutions that make our green future possible in the first place.

Find out how you can contribute to a sustainable energy supply in the following article.

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