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Photoncycle 🇳🇴 Hiring · 4 open roles ↗

Series A · €15M

Seasonal energy storage that lets households store surplus summer solar power for winter heat and electricity; rolling out in Denmark and the Netherlands.

About Photoncycle

Photoncycle offers a solar energy system that integrates solar panels, a processing unit, and a high-capacity underground hydrogen storage solution, enabling year-round energy autonomy and efficient energy trading. The technology utilizes solid-state hydrogen storage, which is significantly denser than traditional lithium-ion batteries, to balance energy production and consumption while stabilizing the power grid.

Photoncycle is a Norway-based company founded in 2020, now around 25 people. It has raised $17.7M in disclosed funding. FundFinder classes it as Climate & Energy.

Founder: Bjorn Brandtzaeg (Founder and CEO; repeat founder; previously Adam Smith International, Adjaristsqali Georgia LLC (AGL); Harvard Business School).

Its investors also appear on FundFinder's most-active lists for Series A · DeepTech (53 funds), Series A · Generalist (64 funds), Series A · AI (62 funds).

Company facts from Harmonic and public filings; team backgrounds from public profiles. Refreshed weekly.

Want the latest on Photoncycle? Our research agent pulls the current description, latest round and full investor base from public sources (about a minute).

Hiring now · 4 live roles, checked daily

Series A · €15M · Mar 2026

  • Lifeline Ventures — Finland's leading early-stage firm, investing from a €150m fifth fund raised in 2023. · cheques £200k – £3M
  • Voima Ventures — Helsinki deep tech VC with an office in Stockholm. · cheques £170k – £2.5M

Read the announcement ↗

Raising your own round? See which European funds fit →