Photoncycle Secures €15M for Seasonal Energy Storage

Hello, Mobikolik.com readers! We're here with a significant development that could revolutionize the energy world. Photoncycle, a Norwegian energy storage scale-up, has successfully raised €15 million in Series A funding, aiming to solve one of Europe's biggest renewable energy challenges. This impressive funding round looks set to enable households to store their surplus summer solar power for winter heating and electricity needs.

The round was led by NordicNinja and Voima Ventures, with participation from existing investors Lifeline Ventures, Eviny Ventures, Luminar Ventures, and Momentum. This marks a crucial step for Photoncycle in commercializing its patented solid-state hydrogen energy storage systems.

So, what exactly does Photoncycle do? The company develops solid-state hydrogen energy storage systems that allow households and businesses to store excess renewable energy for seasonal use. Their patented technology converts surplus solar power into solid-state hydrogen, which is then stored underground. When needed, this stored energy is released as clean heat and electricity. Essentially, they're building a bridge to carry summer sunshine into winter.

This investment arrives as Europe continues to grapple with energy vulnerabilities, starkly exposed by the 2022 crisis. In 2025, the EU imported €396 billion in fossil fuels, underlining an ongoing reliance on external supply. Winter risk remains high, with space heating accounting for a significant 62.5% of household energy use, and natural gas still being a major component.

Photoncycle’s distributed, household-level seasonal storage is designed to reduce the volume of imported gas required to meet winter heating demand. At full industrial scale, the company’s proposed 1.4 TWh manufacturing facility would represent storage capacity equivalent to roughly 140,000 homes, each storing 10,000 kWh of seasonal energy. This could significantly impact Europe's energy independence.

Bjørn Brandtzæg, founder and chief executive of Photoncycle, states that the company is focused on moving seasonal energy resilience closer to consumers. "Europe is beginning to solve short-duration storage. The remaining gap is seasonal. If households can store summer energy for winter use, they reduce exposure to imported fuel and price volatility, as well as to increasing grid costs for consumers," Brandtzæg explains.

The company plans to offer its system through a subscription-based model. This model will cover solar panels, storage, servicing, and access to energy trading markets, with the clear aim of lowering upfront costs for homeowners. By shifting summer solar energy into winter use, Photoncycle looks to provide households with more predictable year-round energy costs and reduced exposure to volatile gas markets.

The new funding will support the commercial rollout in Denmark and the Netherlands and finance the first phase of the company’s industrialization plan, including the proposed 1.4 TWh annual manufacturing facility. Beyond its initial European markets, Photoncycle also sees longer-term expansion opportunities in regions such as Japan and the United States. We'll definitely be keeping a close eye on this technology that could eliminate future energy bill worries!