Blogpost | Repowering Europe: Upgraded Grids for a Decarbonized and Electrified Future
Written by Marlène Siméon, Head of EU Policy (marlene.simeon@fcarchitects.org) and Antoine Koen, Cleantech Analyst – Energy System Lead (antoine.koen@fcarchitects.org)
The European Commission’s forthcoming Grids Package is a critical opportunity to rethink how Europe builds and operates its power networks. At Future Cleantech Architects (FCA), we believe the discussion must move beyond simply adding more cables and pylons. The challenge is not only to expand but also to optimize, give flexibility, digitize, and innovate.
Decarbonization and electrification have become almost synonymous and lie at the heart of Europe’s energy transition: the more we electrify, the cleaner our energy system becomes. Yet that also means we need electricity grids capable of carrying a far greater load than ever before.
Across Europe, electricity demand is rising at an unprecedented pace. Households are switching to heat pumps, vehicles are becoming electric, industrial processes are shifting from fossil fuels to clean power, and artificial intelligence (AI) data centers are expanding rapidly. According to the European Commission, electricity currently accounts for about 21% of final energy consumption, but demand is expected to increase by 60% by 2030. Meeting that demand will require an additional 64 GW of grid capacity to keep pace.
Electricity grids are the hidden foundation of Europe’s climate and industrial ambitions. They not only transmit energy, they also integrate markets across borders, improving security of supply and lowering costs for consumers. The European Union estimates that interconnected electricity markets already provide benefits worth 34 billion euros every year. However, inadequate grid capacity has become a growing economic burden. In 2023, congestion management alone cost 4.2 billion euros, a figure that will only rise unless Europe acts decisively to modernize its infrastructure.
Smarter infrastructure for immediate capacity gains
Europe can significantly increase the capacity of its electricity networks without waiting for entirely new transmission lines. A suite of mature and rapidly deployable technologies, known collectively as Grid-Enhancing Technologies (GETs), can deliver major improvements in efficiency and throughput. These include:
- Dynamic line rating (DLR): Conventional grid management operates each line at a fixed limit to prevent overheating and excessive sagging. In reality, a line’s safe current-carrying capacity changes constantly with the weather. Dynamic line rating uses sensors to measure temperature, wind speed, and other environmental factors in real time. On a cool, windy day, a line can safely carry much more current than on a hot, still day. Across Europe, DLR can deliver a capacity increase of up to 40-100%, although this strongly depends on the specific weather conditions, so the average across Europe is around 10-15%.
- Reconductoring: This involves replacing traditional aluminum-and-steel cables with advanced high-temperature, low-sag conductors that use carbon-fiber composite cores. These conductors can operate at higher temperatures and carry two to three times more power without changing tower height or rights-of-way. Although these cables cost more per meter (2-4 times), the overall project cost is typically less than that of building a new conventional line, for the same capacity increase, thanks to avoiding the costs of new towers and right-of-way. See Fig. 1.
- Emerging materials: Innovative photonic coatings applied to existing power lines can reduce surface temperature and increase capacity by up to 30% at just 5% of the cost of reconductoring according to startup AssetCool. These coatings can be added both at the manufacturing stage and retrofitted in the field using automated robots.
- Energy storage as a transmission asset: Large-scale and long duration storage systems, including thermal energy storage for industrial heat (see the FCA factsheet, technical report, and policy brief), can absorb excess renewable power during times of oversupply and release it later when demand peaks. In practice, this acts as a virtual line expansion that relieves congestion and reduces renewable curtailment. The concept is already being tested in Germany and could be scaled up across the European Union.
Figure 1: conventional round-wire conductor (left) and compact trapezoidal conductor (right). Notice the empty space between the round wires on the left. Source: Wikimedia
Taken together, these innovations could deliver 20-40% additional capacity on Europe’s grids by 2040 using the infrastructure we already have. They should be recognized as critical infrastructure upgrades within national energy and climate plans and supported through European Investment Bank counter-guarantee schemes to de-risk investment and accelerate deployment.
Flexibility as the cornerstone of a renewable grid
A decarbonized energy system cannot function without flexibility, and Europe’s electricity markets still fail to properly reward it. Energy storage facilities and flexible consumers provide essential services by balancing supply and demand, absorbing surpluses, and preventing costly peaks. Despite this, they are often penalized through double charging, once when they draw electricity and again when they feed it back into the grid.
A coherent European flexibility strategy is urgently needed. Such a strategy should define energy storage as a distinct asset class within regulation, ensuring that it is fairly compensated for the stability and balancing services it provides. Grid tariffs and levies must be reformed to remove double charges and to reward consumption that supports the system, such as shifting demand to times of high renewable generation (off-peak tariffs). Long duration and thermal energy storage technologies deserve equal treatment with lithium-ion batteries, since they are critical for balancing energy across hours, days, and even seasons.
Studies indicate that a well-designed flexibility framework could reduce wholesale electricity costs by 14% by 2030 and by 52% by 2040, while eliminating the need for new fossil-fuel backup plants. Flexibility is therefore not a secondary convenience but rather the key to affordability, reliability, and the long-term stability of the energy transition.
Optimizing demand and decentralizing supply
Europe’s electricity networks face the same problem as highways that are jammed during rush hour but are underused for the rest of the day. The grid is built for rare peaks rather than continuously highly utilized. By shifting when and where electricity is used, new loads can fit in the existing gaps and much of this stress can be avoided without constructing new lines. This can be accomplished with technologies such as decentralized energy resources, distributed storage, microgrids, and on-site renewables. These also enhance resilience by providing backup power during outages and reducing dependence on long-distance transmission. The full locational value of these resources must be recognized in grid planning, network remuneration, and connection procedures should be harmonized across member states so that smaller producers and local industries can participate effectively.
Permitting, public engagement, and the role of small and medium-sized enterprises (SMEs)
While digital upgrades and innovative technologies can provide fast relief, physical grid expansion will still be necessary. However, large infrastructure projects remain slow, capital-intensive, and often face strong local resistance. A wind farm, for instance, can be built in two years but may wait up to nine years for a grid connection.
Europe needs to replace the “first come, first served” model with a prioritization system that connects projects based on readiness, strategic importance, and renewable integration potential. The streamlined permitting procedures established under the Renewable Energy Directive must be fully transposed by all member states. At the same time, greater transparency and genuine public consultation are essential for building trust and overcoming “not-in-my-backyard” opposition.
Small and medium-sized enterprises also face unique challenges in this context. Many lack access to nearby high-capacity substations or the administrative experience to navigate complex grid coordination. Dedicated support for first-of-a-kind industrial electrification projects would help SMEs secure connections faster and scale more easily, ensuring that Europe’s industrial competitiveness remains strong in a clean-energy economy.
Conclusion: A smarter path to net zero
Transforming Europe’s electricity grid will require investment on a scale rarely seen before. The European Commission estimates that the build-out rate must accelerate between 3-20 times compared to historical trends for distribution and transmission networks, respectively. Yet the economic return is clear. Strengthening cross-border connections and expanding storage could reduce generation costs by € 9 billion each year by 2040, against an annual investment of € 6 billion.
Europe’s grids are both the bottleneck and the bridge to net-zero. With smarter technologies, better regulation, and engaged citizens, we can repower the grid, not just rebuild it. The upcoming Grids Package offers a historic opportunity to bring these solutions together.