Edinburgh’s Exergy3 Raises €11.4 Million in Seed Funding to Turn Surplus Renewable Power Into Clean Industrial Heat

Why It Matters

The capital accelerates a technology that tackles two critical challenges – industrial decarbonisation and renewable curtailment – unlocking a low‑cost, zero‑carbon heat supply for heavy industry.

Key Takeaways

• Exergy3 secured €11.4 M (~$12.3 M) seed funding for thermal storage tech.
• Technology converts curtailed renewable electricity into 50‑1200 °C industrial heat.
• Funding will double headcount and launch a Munich office this quarter.
• Modular units aim to replace fossil‑based heat in energy‑intensive sectors.
• Investors cite industrial process heat as a $1 trillion decarbonisation market.

Pulse Analysis

Industrial process heat accounts for roughly 20% of global energy use, yet most of it still relies on natural gas or coal. As renewable generation spikes, grid operators increasingly face curtailment, wasting cheap clean electricity. Converting that surplus into high‑temperature heat offers a dual solution: it eases grid stress while providing a carbon‑free heat source for sectors such as steel, chemicals, and cement that cannot easily switch to electricity alone.

Exergy3’s approach hinges on ultra‑high‑temperature thermal storage, a technology that stores electricity as heat in compact, modular units capable of delivering temperatures up to 1,200 °C. Unlike conventional molten‑salt systems limited to lower temperatures, Exergy3’s design supports a broader range of industrial processes, from direct heating to steam generation. The modularity reduces installation time and capital outlay, making it attractive for retrofits and new plants alike. By leveraging periods of negative or zero‑price electricity, the system can produce heat at a lower marginal cost than fossil fuels, enhancing competitiveness for early adopters.

The €11.4 million raise reflects growing investor confidence in climate‑hardware solutions that address hard‑to‑decarbonise sectors. Europe’s industrial decarbonisation agenda, backed by substantial policy incentives, creates a sizable market opportunity estimated in the low‑trillions of dollars. Exergy3’s expansion into Germany, a hub for heavy industry, positions it to capture demand from manufacturers seeking to meet tightening emissions standards. If the company can scale manufacturing and prove commercial reliability, its technology could become a cornerstone of the clean‑heat ecosystem, reshaping energy economics for the next generation of industrial players.

Deal Summary

Edinburgh‑based CleanTech startup Exergy3 announced a €11.4 million (≈$12.4 million) seed round led by Axeleo Capital, with participation from Bayern Kapital, Kibo Invest, Scottish Enterprise, Zero Carbon Capital and Old College Capital. The funding will be used to scale its ultra‑high temperature thermal energy storage technology for clean industrial heat, expand manufacturing capacity and grow its team. The round was disclosed on 21 April 2026.