Climate Tech Is Not a Theme — It Is a Technology Revolution

There is a category error at the heart of much climate tech investing, and it is causing capital to be misallocated on a large scale. Climate tech is frequently framed as a thematic investment category — one defined by the environmental benefit of the companies it encompasses rather than by the technological characteristics of those companies. This framing leads investors to evaluate climate tech opportunities through an ESG lens rather than a technology lens, and to make investment decisions based on carbon accounting rather than competitive advantage analysis. The result is a portfolio of investments that may score well on impact metrics but poorly on returns. At Hilberts AI Capital, we approach climate tech as a technology revolution, not a theme, and our investment framework reflects that conviction.

The Technology Revolution Frame

When we describe climate tech as a technology revolution rather than a theme, we mean something specific: the technologies required to decarbonise the global economy are not improvements on existing systems — they are genuinely new technologies that will replace existing systems. Solid-state batteries are not better lead-acid batteries. Green hydrogen from electrolysis is not cleaner natural gas. Direct air carbon capture is not a better smokestack scrubber. These are distinct technological platforms that will create new industries, displace existing ones, and generate the kind of value creation that makes venture capital viable.

This distinction matters because it changes the investment framework. A theme investor looks for companies that are reducing carbon emissions and asks whether the impact justifies the investment. A technology investor looks for companies that have built a genuine technological advantage and asks whether that advantage is defensible, scalable, and commercially addressable in a market large enough to generate venture returns. These are different questions, and they lead to different portfolios. The technology investor's portfolio is a subset of the theme investor's portfolio — it includes only the climate tech companies that have real technology moats — but it is a much higher-quality subset.

Consider two solar energy companies. Company A is a project developer that finances and builds solar farms using best-in-class commercial solar panels purchased from third parties. Company B is a materials science company that has developed a novel perovskite-silicon tandem cell architecture that achieves 32% efficiency compared to the 22% industry standard. Both companies reduce carbon emissions. Only Company B has a technology moat. Only Company B offers a venture investment thesis that is not primarily a commoditised capital allocation story. The theme investor might own both. The technology investor would own only Company B — and would likely be able to offer a more compelling valuation for that investment because they understand the value of the technology differentiator.

Where the Real Technology Innovation Is Happening

The genuine technology innovation in climate tech is concentrated in a handful of areas that are worth understanding in some depth, because the quality of investment opportunities varies enormously across them. Advanced energy storage is one of the most important. The intermittency of renewable energy makes storage one of the critical enabling technologies for a decarbonised grid. Lithium-ion batteries have become dramatically cheaper over the past decade, but they have fundamental limitations — energy density, cycle life, temperature performance, and safety — that create persistent demand for alternative chemistries. Solid-state batteries, which replace the liquid electrolyte of conventional lithium-ion cells with a solid ceramic or polymer electrolyte, offer potential improvements in all of these dimensions, and European companies including QuantumScape's European research collaborators and a number of university spinouts are advancing solid-state battery technology toward commercial readiness.

Industrial decarbonisation is another area of concentrated technology innovation. Industry accounts for approximately 30% of global CO2 emissions, and the decarbonisation pathways for industries like cement, steel, ammonia production, and chemical manufacturing are fundamentally different from those for power generation or transportation. These industries cannot simply electrify — they require process innovations that change the fundamental chemistry of their production pathways. The companies working on green hydrogen-based direct reduction of iron ore, electrolytic cement kilns, and carbon capture integrated into industrial processes are building genuinely novel technologies that address markets that have been largely ignored by the consumer-facing focus of many climate tech investors.

Carbon capture, utilisation, and storage (CCUS) is evolving from a compliance technology into an economic opportunity. Direct air capture companies like Climeworks — a Swiss company that has demonstrated industrial-scale carbon removal and is actively expanding — are building businesses that will be underpinned by growing corporate carbon removal demand and, eventually, potentially carbon pricing. The technological challenge in direct air capture is cost: current costs run to several hundred dollars per tonne of CO2 removed, and the commercial opportunity scales as that cost falls toward the $100–200 range that enables a broader set of corporate customers to justify the purchase.

The European Regulatory Environment as Competitive Advantage

Europe's regulatory environment for climate tech is the most advanced in the world, and it creates commercial opportunities for European climate tech companies that their global competitors cannot easily access. The EU's Emissions Trading System, which has been operating since 2005 and has progressively tightened its carbon price floor, currently prices EU carbon allowances above €60 per tonne — a level that makes the economics of many climate tech solutions viable. The Carbon Border Adjustment Mechanism (CBAM), which began its transition phase in 2023 and will be fully implemented by 2026, will impose carbon costs on imports from countries without equivalent carbon pricing, creating a level playing field for European industrial companies that invest in decarbonisation and a significant commercial tailwind for the climate tech suppliers that enable them.

The EU's Net-Zero Industry Act and the revised Renewable Energy Directive are creating procurement preferences and manufacturing incentives that benefit European clean energy manufacturers. Germany's Inflation Reduction Act equivalent — the Climate Investment Package — is directing tens of billions of euros toward industrial decarbonisation, green hydrogen infrastructure, and clean energy manufacturing, creating demand for the technologies that European climate tech companies are building.

For investors, the European regulatory environment provides a meaningful de-risking of the commercial pathways for European climate tech companies. Regulatory certainty — the confidence that carbon pricing will remain in place, that government procurement will prioritise low-carbon solutions, and that import competition will not disadvantage European manufacturers who invest in decarbonisation — reduces the commercial risk of climate tech investments in a way that is genuinely differentiated from the US or Asian investment environment.

Our Framework for Evaluating Climate Tech Opportunities

Our investment framework for climate tech starts with three questions that we apply before anything else. First: is this a technology company or a project company? Technology companies have proprietary innovations that create defensible margins. Project companies deploy existing technologies at scale, often with thin margins and high capital requirements. Both can contribute to decarbonisation, but only technology companies offer venture capital returns. Second: what is the technology moat? We ask specifically what knowledge, process, material, or algorithm the company has developed that competitors cannot replicate in less than three years with adequate capital. If the honest answer is "nothing — the moat is our execution and cost efficiency," we are likely looking at a project company or a thin-margin service business. Third: what is the commercial pathway that does not depend on regulatory mandates?

The third question deserves elaboration. Many climate tech companies have business models that work only if specific regulatory incentives — tax credits, renewable portfolio standards, carbon pricing — remain in place. Regulatory dependency is a risk that venture investors often underestimate, because regulations can change. The most compelling climate tech investments have commercial logic that works even in a less favourable regulatory environment, because the technology is economically superior to its alternatives on purely commercial grounds.

We also apply a timing analysis to each climate tech opportunity. Some clean energy technologies — like solar panels, wind turbines, and electric vehicles — are already at or past cost parity with their fossil fuel alternatives and are in the deployment phase, which is no longer a venture investment opportunity. Others — like solid-state batteries, sustainable aviation fuels, and direct air capture — are approaching cost parity on timelines consistent with seed-stage investment at reasonable valuations. And others — like nuclear fusion and truly long-duration grid storage at commercial scale — are still distant enough that seed-stage investment today implies a much longer hold period than most venture funds can accommodate. Timing matters.

The Companies We Are Excited About

Within our framework, we are most excited about climate tech opportunities in four areas. Advanced materials for clean energy — particularly novel battery chemistries, thermoelectric materials, and solar cell architectures — where genuine materials science innovation creates durable technological moats. Industrial process innovation — particularly in steel, cement, and chemical manufacturing — where the decarbonisation pathways require genuine chemistry and engineering innovation rather than electrification. Sustainable aviation fuels and marine fuels — where the production economics of synthetic fuels are improving rapidly and where regulatory demand from the EU's ReFuelEU Aviation and FuelEU Maritime regulations is creating near-term commercial pull. And carbon removal and utilisation — where a handful of European companies are building genuinely differentiated approaches to direct air capture, bioenergy with carbon capture, and CO2 utilisation chemistry that address the residual emissions that cannot be eliminated through the electrification pathway.

These areas share a common characteristic: they require genuine scientific and engineering innovation, they are not addressable by software alone, and they have commercial pathways that are visible within the timeframe consistent with seed-stage investment. They are, in our view, the best expression of what we mean when we say climate tech is a technology revolution rather than a theme.

We are actively building our climate tech portfolio. If you are developing genuinely differentiated technology for industrial decarbonisation, advanced energy storage, sustainable fuels, or carbon removal, we want to hear from you.