Latest / The Productivity Podcast with Fexingo: Output, Efficiency, and Long-Term Economic Growth / Why Denmark Leads Europe in Wind Energy Productivity
Transcript
- Lucas: Denmark gets over half its electricity from wind. That number gets thrown around a lot — usually as a headline about green energy. But the more interesting question is how productive those turbines actually are, and the answer is: significantly more productive than almost anywhere else. Luna: Meaning they generate more electricity per installed megawatt than other countries' wind farms? Lucas: Exactly. The metric is called capacity factor — actual output divided by theoretical maximum. Globally, onshore wind averages around 30 percent. Offshore can push 40 percent in good sites. Denmark's fleet — onshore and offshore combined — consistently hits 45 percent or higher. That's a productivity gap worth understanding. Luna: Is it just that Denmark has great wind? I mean, it's a windy country. Lucas: Partly. But the North Sea is windy for everyone — the UK, Germany, the Netherlands all have similar wind regimes. Yet their capacity factors lag. The difference is systemic. Denmark didn't just build turbines; it built an ecosystem that optimises every part of the process — from siting to maintenance to grid integration. Luna: Let's start with siting. How do they choose where to put turbines? Lucas: They've been doing this since the 1980s, so they have decades of wind data. But more importantly, they pioneered a cooperative ownership model. Local communities invest in turbines and get a share of the revenue. That created political buy-in — fewer NIMBY fights — and it also meant turbines were placed in genuinely optimal spots, not just where developers could get permits. Luna: So community ownership aligns incentives. Interesting. Lucas: It does. And it forced a level of transparency about performance. When your neighbours own the turbine, you want to know it's actually producing. That pressure led to better maintenance practices. Danish turbines are serviced more frequently and more predictably than in many other countries. Luna: I read that Denmark has a mandatory certification scheme for turbine maintenance. Is that part of it? Lucas: Yes. The Danish Energy Agency requires all turbines to undergo periodic certification — not just at installation but throughout their life. If a turbine's performance drops below a certain threshold, the operator has to fix it or face penalties. That's rare globally. Most countries just certify at installation and then let the market handle it. Luna: And the result is that older Danish turbines still produce well. I saw a statistic that turbines from the 1990s in Denmark still have capacity factors around 25 percent, which is remarkable for their age. Lucas: That's exactly right. Those early models would be scrap in many markets. But because they were maintained, they kept running. And that feeds into another productivity advantage: Denmark has the world's most sophisticated grid integration for wind. Luna: What does that mean in practice? Lucas: Wind is variable, so if the grid can't handle fluctuations, you have to curtail turbines — shut them down when they'd otherwise be producing. That destroys capacity factor. Denmark solved this by interconnecting with Norway and Sweden, which have massive hydro capacity. When the wind blows hard, Denmark exports power; when it's calm, it imports hydro. Luna: So they're using hydro as a virtual battery. Lucas: Exactly. And that interconnection wasn't built for wind initially — it was built for reliability in the 1970s. But it became a huge productivity multiplier. Denmark's curtailment rate is below 1 percent. In Germany, which has less flexible interconnections, it's around 5 percent. That 4 percentage point difference compounds into a lot of lost output over a year. Luna: Are there specific offshore projects that exemplify this? Lucas: The best example is Kriegers Flak, a 600 megawatt offshore wind farm in the Baltic Sea, commissioned in 2021. It was built with a combined grid connection — so it connects directly to both Denmark and Germany. That gives it flexibility that most offshore farms lack. Its capacity factor has been above 50 percent since it started operating. Luna: Fifty percent — that's almost like a natural gas plant. Lucas: Right. And Kriegers Flak was built at a cost of about 50 euros per megawatt-hour, which is competitive with fossil fuels. That's the productivity payoff. When your turbines run at higher capacity factors, the levelised cost of energy drops significantly. You need fewer turbines to generate the same amount of power, which lowers land use, maintenance, and capital costs. Luna: So the productivity angle isn't just technical — it's economic. Higher capacity factor means lower cost per kilowatt-hour. Lucas: Precisely. And that's why other countries are now copying Denmark's approach. The UK’s latest offshore wind auctions require projects to include grid interconnection plans similar to Kriegers Flak. Germany is reforming its maintenance certification rules. Japan sent delegations to study Denmark's cooperative ownership model. Luna: But can the Danish model scale to larger countries? The UK has five times Denmark's population and a much larger grid. Lucas: That's the open question. What works for a small, interconnected system may not translate one-to-one to a country like the US, where the grid is balkanised across dozens of balancing authorities. But the principles — community buy-in, mandatory maintenance, flexible interconnection — can be applied piece by piece. Texas, for example, could benefit from better turbine maintenance standards. Luna: Speaking of the US, the Inflation Reduction Act included tax credits for wind, but not much on operational productivity. Is that a missed opportunity? Lucas: It's a huge one. Building more turbines is good, but making existing ones more productive is arguably more efficient. Denmark shows that a focus on operational excellence can increase output by 20 to 30 percent without adding a single new turbine. That's the kind of productivity gain that pays for itself. Luna: It also reduces the land-use conflict. Fewer turbines for the same power output. Lucas: Exactly. And land use is becoming a bigger issue. In Germany, you see protests about forest clearance for wind farms. If you can get the same energy from fewer, better-sited turbines, you reduce those conflicts. That has political productivity too — less friction means faster approvals. Luna: I want to circle back to the cooperative ownership model. How widespread is it in Denmark? Lucas: About 15 to 20 percent of Danish wind capacity is still community-owned. That's down from 80 percent in the early 2000s, as industrial players like Ørsted took over large offshore projects. But the legacy matters: the cooperatives created a culture of acceptance and engagement. Even now, new onshore wind projects often offer local ownership shares as part of the approval process. Luna: So the productivity benefit isn't just technical — it's social. When people have a stake, they tolerate more turbines. Lucas: Exactly. And that tolerance speeds up permitting, which is one of the biggest bottlenecks for renewable energy globally. Denmark's average permitting time for onshore wind is two years. In the UK, it's five to seven. In some US states, it's ten years or more. That's a productivity gap right there. Luna: Is there a downside to the Danish model? Are there inefficiencies? Lucas: The main criticism is that the push for high capacity factors can lead to suboptimal siting in terms of system-level cost. If you only build turbines where the wind is best, you might concentrate them far from demand centres, requiring long transmission lines. Denmark is relatively small, so that's less of an issue, but it could be a problem in larger countries. Luna: So the lesson might be: pick your principles, but adapt them to your geography. Lucas: Right. The core lesson is that productivity in wind energy isn't just about turbine technology — it's about the entire system: ownership, maintenance, grid integration, permitting. Denmark cracked all four, and that's why its wind fleet is the world's most productive. Luna: It's a good reminder that productivity isn't always about doing more with less — sometimes it's about doing smarter with what you have. Lucas: Well said. And on that note — if walking through the economy with us has made something click, or if you just value that this show doesn't run traditional ads, we keep it that way because of listeners who choose to support us directly. You can find that at buy me a coffee dot com slash fexingo. No pressure, just an option if the show brings you value. Luna: It's a model we believe in — keep the content clean and listener-supported. And it works because of people like you. Lucas: Alright, back to the wind. So the question for other countries is: can they replicate Denmark's success? I think the answer is yes, but it requires patience. Denmark spent 40 years building this system. You can't just order the parts from a catalogue. Luna: So the ultimate productivity lesson is institutional, not technological. Lucas: Exactly. Technology is easy to copy. Institutions — trust, maintenance norms, community ownership — those are hard. But they're what make the technology actually productive.