Denmark energy profile
Denmark — the country that invented offshore wind at scale
1991
World's first offshore wind farm, built by Denmark
~46.8%
Of 2024 electricity from wind alone
2.3 → 18 GW
Offshore wind capacity, today vs. 2030 target
$34 Bn
Estimated cost of the North Sea energy island
From the first offshore turbine to artificial islands
Denmark's 35-year head start on offshore wind
Where it started:
Denmark installed the world's first offshore wind farm in 1991 — a modest 5 MW array just 2 kilometres off the coast — decades before offshore wind became a mainstream part of any other country's energy strategy. That head start compounded: by 2024, wind power alone supplied nearly half of Denmark's domestic electricity (approximately 46.8%), an extraordinary share for a country of its size, built on a robust mix of onshore and offshore capacity developed over more than three decades.
Denmark installed the world's first offshore wind farm in 1991 — a modest 5 MW array just 2 kilometres off the coast — decades before offshore wind became a mainstream part of any other country's energy strategy. That head start compounded: by 2024, wind power alone supplied nearly half of Denmark's domestic electricity (approximately 46.8%), an extraordinary share for a country of its size, built on a robust mix of onshore and offshore capacity developed over more than three decades.
The next step — building islands for wind:
Denmark is now going further than any other country: it's constructing "energy islands" — artificial and repurposed islands in the North Sea and Baltic Sea, purpose-built to aggregate power from surrounding offshore wind farms and transmit it to shore and neighbouring countries more efficiently than individual cable runs. The North Sea energy island alone is estimated to cost roughly $34 billion, part of a combined 5 GW "energy islands" target by 2030, and offshore wind capacity overall is targeted to grow nearly sevenfold, from 2.3 GW today to 18 GW by 2030 and 35 GW by 2050.
Denmark is now going further than any other country: it's constructing "energy islands" — artificial and repurposed islands in the North Sea and Baltic Sea, purpose-built to aggregate power from surrounding offshore wind farms and transmit it to shore and neighbouring countries more efficiently than individual cable runs. The North Sea energy island alone is estimated to cost roughly $34 billion, part of a combined 5 GW "energy islands" target by 2030, and offshore wind capacity overall is targeted to grow nearly sevenfold, from 2.3 GW today to 18 GW by 2030 and 35 GW by 2050.
Warmth without waste
District heating, CHP, and where biomass fits in
An unusually integrated heating system:
More than 80% of Danish district heating is cogenerated with electricity through combined heat and power (CHP) plants — meaning most of the heat piped into Danish homes is essentially a byproduct captured from electricity generation rather than produced separately, a far more efficient approach than running power plants and heating boilers as two disconnected systems. Biomass and organic waste supply about 12% of Denmark's total power generation through these CHP plants, and bioenergy as a whole accounts for more than two-thirds of the country's combined renewable energy consumption — a critical complement to wind on days when the wind doesn't blow.
More than 80% of Danish district heating is cogenerated with electricity through combined heat and power (CHP) plants — meaning most of the heat piped into Danish homes is essentially a byproduct captured from electricity generation rather than produced separately, a far more efficient approach than running power plants and heating boilers as two disconnected systems. Biomass and organic waste supply about 12% of Denmark's total power generation through these CHP plants, and bioenergy as a whole accounts for more than two-thirds of the country's combined renewable energy consumption — a critical complement to wind on days when the wind doesn't blow.
Copenhagen's ambition, and what's next:
Copenhagen set out to become the world's first carbon-neutral capital city by 2025, replacing coal-fired heat with biomass, expanding wind and solar, and pushing residents toward cycling and public transit — an aggressive target that illustrates the scale of Danish climate ambition even if the city's final results against that exact deadline remain to be fully assessed. Looking ahead, Denmark is also targeting rapid biogas growth in its gas network (from roughly a fifth of consumption toward more than 100% by 2030, implying net biogas exports) and 4-6 GW of green hydrogen electrolysis capacity by 2030 under its Power-to-X strategy — extending the same "electrify and integrate everything" approach that built its heating and wind sectors into its newer clean fuel ambitions.
Copenhagen set out to become the world's first carbon-neutral capital city by 2025, replacing coal-fired heat with biomass, expanding wind and solar, and pushing residents toward cycling and public transit — an aggressive target that illustrates the scale of Danish climate ambition even if the city's final results against that exact deadline remain to be fully assessed. Looking ahead, Denmark is also targeting rapid biogas growth in its gas network (from roughly a fifth of consumption toward more than 100% by 2030, implying net biogas exports) and 4-6 GW of green hydrogen electrolysis capacity by 2030 under its Power-to-X strategy — extending the same "electrify and integrate everything" approach that built its heating and wind sectors into its newer clean fuel ambitions.
Questions
Questions about Danish energy
What exactly is an "energy island," and why is Denmark the first country building one?
An energy island is essentially an offshore electrical substation given its own dedicated island — built specifically to collect power from a cluster of surrounding offshore wind farms, convert and stabilise it, and then transmit it to shore (and potentially to neighbouring countries) through a smaller number of large, efficient connections rather than each wind farm running its own separate cable back to land. As offshore wind farms get built farther from shore and at ever-larger scale, running individual transmission cables for each one becomes increasingly expensive and inefficient — an energy island lets many wind farms share centralised infrastructure instead, similar to how a regional airport hub is more efficient than every small town having its own direct international flights. Denmark is first partly because it has the most mature offshore wind sector to justify the investment (three decades of buildout means enough wind capacity is being planned to make a shared hub worthwhile) and partly because its North Sea and Baltic Sea locations are well suited to the concept, with relatively shallow waters and strong, consistent wind resources across a wide area. If it works as planned, the energy island could also become a hub for producing green hydrogen directly from surplus offshore wind power, adding another use case beyond electricity transmission alone. Source: European Commission Clean Energy Islands portal · Bloomberg · IEA Denmark Country Report 2023.
Provenance
Attribution and citation
- Sources
- International Energy Agency (IEA) Denmark Country Report 2023 · RMI · EBSCO Research Starters · European Commission Clean Energy Islands portal · Bloomberg · ScienceDirect (Danish offshore wind integration research) · Yale Environment 360 · Construction21
- Cite as
- "Denmark Energy Profile — Complete Reference", The Energy Codex, https://thecodex.expert/energy/countries/denmark/, last updated .