In the Founder Series, we dive deep with the Nordic entrepreneurs building the future. This time, we sit down with Bjørn Brandtzæg, founder and CEO of Photoncycle- a Norwegian deep-tech startup revolutionizing home energy with seasonal storage that turns summer sun into winter resilience. From wilderness skis to €15 million raises, Bjørn shares the vision, the grind, and why Photoncycle could redefine Europe's grid.
You're logging 100 kilometers of cross-country skiing weekly in Oslo's wilderness. What's the real payoff beyond the fitness?
It keeps you in super shape, but more than that, it gets you out into nature alone. We've had nearly a meter of snow lately- you strap on torchlights and vanish into 100 kilometers of untouched wilderness north of Oslo. Last week, my friend and I did 30 kilometers, came back to the car at minus 19 degrees, barely dressed because you're moving so fast. You feel alive. After years in high-stakes roles, staying fit and mentally reset is crucial.
Other rituals for a founder in deep tech? Biking, sleep- anything else?
I bike to work daily from Oslo's outskirts- 45 minutes round trip, 150 height meters- for that baseline fitness. And sleep: I'm a machine. Bed at 10, up at 7, eight to nine hours every night. Always rested. Hustle culture is overrated. Best thinking happens out exercising, not chained to a desk. Sleep-deprived founders crash. For deep tech, which takes years to build, you need to pace it like a marathon- or a cross-country ski with endless uphill.
Walk us back to Photoncycle's origin. Lightbulb moment?
This is my third company. From big hydro in Georgia I saw Norway's magic: 100% hydro with flexibility via reservoirs for seasonal storage. But mega-projects don't scale easily. At MIT as a visiting fellow, I thought: What if we do this at home level? Distributed energy, homeowners slashing their CO2 emissions, saving significant money on their energy bills, becoming energy-independent, bypassing the grid. My first startup went from idea to $50M raised and 2,000 employees, so I know execution.
Key lessons from prior ventures shaping Photoncycle's culture?
Solve big problems. Niche markets starve startups. Big visions, like decarbonizing Europe's homes sustainably, attract capital and talent. Start grand, then nail the tech, finance, and business model. Easy to talk about but hard to deliver.
Mentors who've nudged you? Anyone pivotal early on?
My first company's board, especially a former CEO of Europe's largest renewables firm Slatkraft, Bård Mikkelsen. He left a top role to join us- now he is Photoncycle's chairman. During 14 years together he's shown that big plans can materialize, lending credibility that opens doors.
Luminar was an early backer. What made that partnership click?
I sought Pan-Nordic investors for seed, tapping Sweden's startup magic -Norway's catching up but we’re not there yet. Luminar stands out: professional, commercial, supportive. Jacob brings fresh angles, always pushing focus. I’m grateful they've stuck with us.
From Georgia infra to Norwegian deep tech - what's the culture shock?
It was my first time building in Norway after years abroad. Strong work-life boundaries, employee rights- you can't just grind endlessly. Norwegian and Swedish style means motivating, not dictating. Even though we have an easier infrastructure here we need to fight complacency and keep the hunger.
Photoncycle's breakthrough moments so far?
I would say the launch reception, the website swamped, with 1,000 monthly registrations. On the Tech side I would say having the pilot fully operational, proving that the small-scale works at full size. Also having unlocked our capital raise.
How does Photoncycle harden Europe against outages, like those in Ukraine?
Central grids are fragile to sabotage as we electrify. Distributed storage builds resilience- household by household. Policymakers already see this.
For a normal family, what's the daily win? CO2 math?
Slash 5 tons CO2/year- most of home emissions while reducing your monthly bills.
Congrats on the €15M round and aiming for 1.4 TWh manufacturing capacity by 2027-that's massive. How does the subscription model make this real for homeowners?
This round funds our first pilot manufacturing line. The full factory comes with Series B. Those 1.4 TWh of capacity? It's 40% more than Europe's projected total battery manufacturing by 2030- game-changing scale. The subscription is simple: "energy independence as simple as a Netflix.". Zero upfront cost- we step in as your electricity and heat provider, plug into your existing bills, and cut them ~30% in Denmark. No capex barrier explains the huge demand, we see 100K+ customers possible there alone, enough to run Denmark's peak grid demand with just 200K systems.
What are you excited for in 2026—professionally and personally?
Tech maturing to mass production by year-end. Personally I look forward to my daughter's high school graduation in Canada this summer- so we’ve got a packed year ahead!
Thanks to Bjørn for the candid chat. Photoncycle is powering resilient homes across Europe- follow their journey, and stay tuned for more Founder Series insights.