In early March 2026, the British investment bank Barclays, one of the world’s largest investment banks and financial services providers, warned investors of increasing risks associated with renewable energy investments. According to an analysis by the bank, the trigger is not a lack of wind or solar projects, but primarily the weak integration with the electricity grid. If new plants cannot reliably feed their electricity into the grid, the authors believe that so-called “stranded-like outcomes”—assets with a sharply declining utility—are likely. The background is critical because, despite record investments in clean energy, global consumption of oil, gas, and coal remains high, while energy supply and price stability are often prioritized over climate goals. For investors, project developers, and energy suppliers, the risk of delays, cost overruns, and declining valuations is therefore growing. (bfsi.economictimes.indiatimes: 05.03.26)
Grid bottlenecks are becoming a core problem for wind and solar farms
According to Barclays, the focus is shifting to the real risk of the energy transition. Previously, the fossil fuel industry was considered the classic candidate for stranded assets. Now, however, wind and solar projects are also coming under scrutiny if grid connection fails or is delayed for too long. Therefore, the value of such plants increasingly depends not only on the technology but also on their connection to distribution and transmission networks.
Daniel Hanna, Head of Sustainable and Transformation Finance at Barclays and co-author of the paper, makes the point clear. The problem isn’t renewables themselves, but a system that isn’t keeping pace with their expansion. According to Barclays, this is precisely where a new field of problematic projects is emerging, but also a market for investors who can identify bottlenecks early and improve infrastructure.
High Fossil Fuel Demand Intensifies Pressure on the Energy Transition
This warning comes at a time of contradictory developments. On the one hand, significant capital is flowing into renewable energies, while on the other hand, global consumption of fossil fuels remains at record levels, according to Barclays. At the same time, geopolitical tensions in the Middle East are once again driving up oil and gas prices. This puts security of supply even more firmly in the spotlight, while emissions reduction is being sidelined in many markets.
This has direct consequences for the evaluation of new energy facilities. Barclays argues that in the future, the efficiency with which an energy source can be integrated into existing supply systems will play a more significant role. A solar park with good technology is of little use if the electricity isn’t transported. Furthermore, many projects are already suffering from long waiting lists for grid connection, while grid operators sometimes even have to compensate wind farms for shutting them down due to overproduction.
Investors must shift their focus from generation to the grid
Barclays’ analysis is not an isolated case. BloombergNEF already pointed out in 2023 that new capacity is of little use without suitable lines and grids. In December 2025, BloombergNEF also reported that grid bottlenecks in the US and Europe were continuing to worsen. The International Energy Agency also warned in its 2025 report that shortcomings in distribution, transmission, and interconnection are slowing down new power plants, increasing costs, and negatively impacting tenders.
This necessitates a change in strategy for investors. Barclays no longer views the energy transition solely as a matter of wind turbines, solar panels, and batteries. Instead, grids, substations, storage facilities, control systems, and other infrastructure that reliably deliver electricity to consumers are becoming crucial. According to the authors, those who address these bottlenecks can unlock additional return opportunities. At the same time, however, the risk is growing that pure generation projects without a robust grid connection will lose economic value.