Tartu Hydrogen Days 2026: ten years in, the lesson is persistence
Tartu Hydrogen Days marked its tenth edition with a two-day look at why hydrogen technologies take so long to travel from the lab to the market. We reflect on what Elcogen, WaterstofNet, Estonia's ports and ministries and a Latvian compression project had to say — and point you to the full recordings and slide decks now online.
NEWS
PtXBaltic
10/16/20265 min read
Tartu Hydrogen Days has now run ten times. The anniversary edition on 8–9 October 2026 went out under the title "From Science to Market", which is really a polite way of asking why a technology people have understood for two hundred years still takes so long to become something a customer pays for. Nobody answered that in two days at the University of Tartu. But a lot of people, from different corners of the sector, said the same thing in different words: the gap gets closed by sticking with it. Here's what we took away, and where the recordings and slides are if you couldn't make it.
Ten years of Hydrogen Days, and a title that finally fits
The early editions were about potential. Fair enough. In 2017 the Baltic hydrogen sector hardly existed and somebody had to argue for it. This year the organisers (University of Tartu, Metrosert, TalTech, Hydrogen Valley Estonia) changed the question. Not what hydrogen might do, but how you actually wire producers, technology developers and users into something that pays for itself.
The programme showed it. Day 1 at Physicum was history and factories. Day 2 at the Library was policy, strategy and students. Out in the EXPO area there were hydrogen cars, a bus, a truck and a drone that you could walk around and poke at. For an event that began as a science meeting, that's a long way travelled.
Persistence is the breakthrough
Professor Enn Lust opened with 250-odd years of hydrogen technology and Tartu's own electrochemistry lineage, from Wilhelm Ostwald through the 1960s space programmes to what runs at Chemicum today. His point was simple. The science has been fine for a very long time. What held things up was materials, manufacturing, cost, and getting anyone to trust the kit.
Enn Õunpuu of Elcogen gave that a face. Elcogen started with first lab tests on solid oxide fuel cells more than 25 years ago. Today the company runs a 14,000 m² cell and stack plant outside Tallinn that, by its own numbers, takes annual capacity from 10 MW to 360 MW, with Innovation Fund money behind it and Baker Hughes and HD Hyundai on the shareholder list. A quarter of a century before the factory existed. That's the honest timeline.
Adwin Martens from WaterstofNet talked about the Benelux experience, and one line from him is worth remembering. Trust in a new technology doesn't come from presentations. It comes from applications people can see working. The Benelux region has roughly a decade's head start on that, and the Baltic hydrogen ecosystem stakeholders in the room didn't need it spelled out further.
A Day 2 programme that covered the whole Estonian chain
Day 2 was a decent cross-section of where Estonia stands. Utilitas and H2Electro on production and integration. Tallinna Sadam on the port side, which in the Baltic is where hydrogen demand and logistics actually meet. The Ministry of Climate and the Ministry of Finance on strategy and the public-money question. TalTech and the University of Tartu kept the science in the mix. On Day 1, Stargate Hydrogen, whose alkaline electrolyser plant in Tallinn started shipping last year, had shared the stage with Horizon Fuel Cell, Destiny Energy, PowerUP and H2Saar from Germany.
There was also a Latvian slot. The HYCODUQ project, hydraulic hydrogen compression for refuelling stations, developed at the ERI VIRAC institute of Ventspils University of Applied Sciences, got its first outing in front of an Estonian audience. Compression is one of the pricier parts of the hydrogen chain, around 30% of a refuelling station's CAPEX by the team's own market analysis. The dual-chamber liquid-piston design targets about 1.36 kWh/kg at 70 MPa, against roughly 5 kWh/kg for standard piston and diaphragm compressors. That's a CFD-modelled target, not a measurement yet. The project sits at TRL 2–3 and lab validation is still running, and the team said so plainly. Right after Elcogen's 25-year story, nobody in the room seemed to mind.
Thirty students and a hydrogen aircraft test station in Pärnu
The hackathon finale was probably the most fun part of Day 2. Thirty students from four universities had spent the days before on a very practical brief: Estonia's regional airports are underused, so find them a new business model. The winners, Marian Traus, Paul Vaidla, Alfred Fjodorov and Laur Kristjan Salvan, pitched a hydrogen aircraft testing station in Pärnu. They tied it to what Pärnu already has, matched it to real bottlenecks in aviation and put numbers on it rather than slogans.
Their prize is a trip to Groningen under the H2Cove project, where Groningen Airport Eelde is building what it calls Europe's first hydrogen airport, to represent Estonia in an international competition. A regional Baltic airport problem, solved by students, then tested against the European reference case. Regional airports as hydrogen demand anchors is an idea none of the three Baltic states has taken very seriously yet. Maybe the students will push it.
The Estonian hydrogen story hasn't been written yet
The line that stuck came from Elo Ellermaa: the Estonian hydrogen story hasn't been written. Most people in Estonia still don't know what hydrogen means for them, so the public picture is up for grabs. Does it stay "expensive, dangerous, unrealistic", or does it end up next to clean nature, energy security, good science and Estonia's own technology companies?
Swap in Latvia or Lithuania and the sentence still works. The Baltic hydrogen community is small. The story gets written one factory opening, one pilot, one student competition at a time, and because the community is small, each of those moves public opinion more than it would in Germany. Tartu's conclusion was that the community should write it itself. We'd agree, for the whole region.
Watch the recordings and download the presentations
You don't have to take anyone's word for any of this, ours included. Hydrogen Valley Estonia has put the full live-stream recordings of both days online, plus every speaker's slides as PDFs. Day 1: Enn Lust, Enn Õunpuu, Kaido Tammeveski, Adwin Martens, Craig M. Knight (Horizon Fuel Cell), Riinu Härmas (Destiny Energy), Kush Chadha (PowerUP), Rainer Küngas (Stargate Hydrogen) and Bodo Groß (H2Saar). Day 2: Ove Oll, Jüri-Mikk Udam (Utilitas), Silver Sepp (H2Electro), Ilona Oja Acik (TalTech), Elo Ellermaa, Hele-Mai Metsal (Tallinna Sadam), the HYCODUQ deck from Ventspils, and Hans Markus Kalmer from the Ministry of Climate.
It's all on the event page linked below. The two YouTube recordings are under "The live stream recording is available here"; the slides are under "Presentations can be found here". Short on time? Open the Elcogen and WaterstofNet decks. They make the persistence argument better than we can. And the next Tartu Hydrogen Days is already in the calendar for 7–8 October 2027.
What to take from it
For Baltic hydrogen ecosystem stakeholders, Tartu 2026 was a useful reality check. The region now has a 360 MW solid oxide factory, a 140 MW alkaline electrolyser line, a port operator thinking hard about hydrogen logistics, a compression technology coming out of a Latvian radio-astronomy institute, and students designing hydrogen airports. None of it came from one big breakthrough. It came from people staying with a problem longer than was comfortable. If the science-to-market gap closes in the Baltics, that's how.