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Photoncycle has raised €15 million in Series A funding to develop solid-state hydrogen energy storage systems, addressing Europe's challenge of storing excess summer solar energy for winter use. Led by NordicNinja and Voima Ventures, the funding will support commercial rollout in Denmark and the Netherlands and the establishment of a 1.4 TWh manufacturing facility.

This facility aims to provide seasonal storage for approximately 140,000 homes, reducing reliance on natural gas during winter. The technology converts surplus solar power into underground stored hydrogen, which can be used for heating and electricity. The company also explores expansion into Japan and the United States.