T4IS2026 Strategy Dialogue: 'The Clean Energy Supercycle' — AI's Power Demand and Investment in Fusion and Next-Generation Fission

The "Clean Energy Supercycle" session at the invitation-only executive summit "Tech for Impact Summit 2026 (T4IS2026)" focused on the intersection of energy and computing infrastructure, addressing whether energy supply can keep pace with AI's power demand and how investors, businesses, and policymakers should respond.

Key discussion points included:

1. **'Power Limits' Redefine Data Center Sustainability:** The definition of sustainability for data centers has evolved from reducing consumption and carbon footprints to optimizing within fixed power allocations and transitioning to on-site generation ('within the meter'). This shift is driven by grid capacity constraints and long lead times for new transformers.

2. **Next-Generation Fission's Role:** Fission and fusion are seen as complementary, not competing, over the next decade. However, fission technologies must meet stringent requirements for inherent safety (fail-safe designs) and modularity (small, numerous reactors rather than large single units) to be viable for data center scale.

3. **Fusion Timeline and Funding:** Commercial fusion is projected for the mid-2030s for on-site use, with grid integration by 2040-2045. The long timelines pose challenges for closed-end European funds. A significant funding gap exists between Japanese ventures (tens of millions USD) and US counterparts (hundreds of millions USD). Long-term investors like sovereign wealth funds and pension funds are crucial.

4. **Business Model Divergence:** A conflict emerged between selling electricity via PPA (preferred by international capital and data center operators) and selling hardware (more familiar to Japanese capital). A hybrid "Hardware-as-a-Service" model was proposed.

5. **European Data Center Sovereignty:** European clients are increasingly seeking data centers not reliant on US-controlled cloud infrastructure due to geopolitical risks, driving demand for localized data center construction and on-site power generation.

The session concluded with commitments to facilitate PPA/service narratives for fusion ventures, explore cross-introductions with power electronics companies, and engage LPs based on timeline alignment rather than solely return profiles. Unresolved questions include structuring Japanese fusion capital to match US scales and the role of European public investment in sovereign computing infrastructure.