Polish Entrepreneurs Put 500 Million Zloty Behind Small Nuclear Reactors

A group of prominent Polish entrepreneurs has put 500 million zloty (about €114 million) into Synthos Green Energy, the small modular reactor company led by billionaire Michał Sołowow, according to Notes from Poland. The investors include InPost founder Rafał Brzoska, ElevenLabs chief executive Mati Staniszewski, Oshee co-founder Dariusz Gałęzewski, Maspex chief executive Krzysztof Pawiński, Michał Brański of Wirtualna Polska and Michał Wypychewicz of ZPUE.

The money arrives alongside 1.35 billion zloty from foreign investors. Together, the two pools secure the company's financing for the next two years, a notable milestone for a technology that is still waiting for its first commercial reactor to come online.

Synthos Green Energy plans to deploy BWRX-300 units, which are 300-megawatt, water-cooled reactors, across several locations. In July the company announced plans to build 14 reactors at three sites in the United Kingdom, with a combined capacity of 4.2 gigawatts, enough to potentially meet 11 per cent of that country's demand. In Poland, the company could see as many as 26 reactors across six locations. The first BWRX-300 under construction, in Canada, is expected to reach commercial operation in 2030, which means the design has yet to prove itself at scale.

Brzoska described the investment as an investment in Poland's future, arguing that affordable energy is essential for further growth in industry, data centres and artificial intelligence. Sołowow said the investors believed in the concept and the solution. The framing is as much about economic competitiveness as about emissions, and it reflects a broader argument that cheap, reliable power is becoming a strategic asset for any country that wants to host energy-hungry digital industries.

The funding does not remove every obstacle. Notes from Poland reports that disagreements between Synthos Green Energy and the state energy giant Orlen have delayed their partnership, and those delays have stalled Poland's small modular reactor deployment plans. In other words, private capital is now ready, but the arrangements needed to turn it into reactors on Polish soil are still unresolved. The company's early emphasis on the UK, where its plans are already specific, suggests that projects abroad may move ahead of those at home unless the dispute is settled.

For a country whose power system has long leaned heavily on coal, the question is what replaces it, and how quickly. Small modular reactors are pitched as a firm, low-carbon source that can be built in repeatable units rather than as one-off megaprojects. Whether they deliver on that promise depends on delivery milestones such as the Canadian unit in 2030, on regulatory approval and on the commercial terms of partnerships like the one with Orlen. The investment is a vote of confidence from Polish business, but it is not yet proof that the technology can be built to time and budget.

The coming months will show whether the new capital helps resolve the standoff with Orlen or simply funds expansion elsewhere. Either way, the backers have placed a sizeable bet that nuclear power will be part of Poland's energy future.

Why it matters

The stalled partnership with Orlen shows that money alone does not build an energy system. Two years of secured funding gives Synthos Green Energy room to wait, but Poland's coal-dependent grid cannot wait indefinitely, and the gap between willing investors and a settled national plan is where the country's low-carbon timeline will be won or lost.