Data Insight: Solar and wind… | Our World in Data Summary

1. Key Themes

Theme: Poland's solar and wind buildout has been fast

Solar and wind share more than doubled in four years

Wind and solar went from a small minority of Poland's power to a quarter of it in a short window.
Quote: "The share of electricity produced by solar and wind in Poland more than doubled in just four years. In 2021, these renewable sources produced just 11% of its power; by 2025, this had risen to 25%."

Theme: Coal still anchors Poland's grid, which is the core transition challenge

Poland remains among Europe's most coal-dependent power systems

Despite rapid renewable growth, half of electricity still comes from coal, so the displacement opportunity remains large.
Quote: "Poland still has one of the most coal-intensive electricity mixes in Europe, with coal producing 50% of its power."

Policy commitment exists, with renewables as a key lever

The country has a stated intention to phase out coal over the coming decades, with solar and wind expected to carry much of the load.
Quote: "The country has committed to moving away from it in the next few decades; growth in solar and wind generation will play a key role in this."

Theme: Weather variability can stall renewable share gains

Weak wind in 2025 flattened combined output growth

Solar kept growing, but a wind shortfall nearly cancelled it out, showing how variable resources can produce year-to-year plateaus even amid structural growth.
Quote: "Solar and wind output, combined, grew very little in 2025, due to weak wind conditions. Solar output continued to grow, but it was barely enough to offset the decline in wind power."

2. Contrarian Perspectives

Fast renewable growth does not automatically mean a fast coal exit. The article pairs a headline of rapid growth with the reality that coal's share remains enormous. A doubling of a small base still leaves the incumbent dominant, which tempers narratives of an imminent transition in coal-heavy economies.

Quote: "Poland still has one of the most coal-intensive electricity mixes in Europe, with coal producing 50% of its power."

Renewable growth is not linear, and single-year stalls are weather-driven rather than structural. The 2025 flat year reflects wind conditions, not a collapse in deployment, so short-term data should be read cautiously by investors.

Quote: "Solar and wind output, combined, grew very little in 2025, due to weak wind conditions."

3. Companies Identified

Ember

Description: Energy think tank and data provider covering electricity systems.
Why mentioned: Source of the electricity data underlying the article's chart.
Quote: "You can see this growth in the chart, based on electricity data from Ember."

4. People Identified

Hannah Ritchie

Description: Researcher and author at Our World in Data.
Why mentioned: Author of the data insight.
Quote: "By Hannah Ritchie"

5. Operating Insights

Treat solar as the more reliable growth driver when planning around Polish renewables. Solar continued expanding even in a weak-wind year, suggesting more consistent output growth than wind.

Quote: "Solar output continued to grow, but it was barely enough to offset the decline in wind power."

Model for resource variability rather than assuming smooth annual growth. A single weak wind year nearly erased combined gains, which matters for revenue forecasting, PPA structuring, and grid planning.

Quote: "Solar and wind output, combined, grew very little in 2025, due to weak wind conditions."

6. Overlooked Insights

Coal's 50% share implies a very large addressable displacement opportunity. With half of generation still from coal and a stated commitment to exit, the volume of generation that must be replaced over the coming decades is substantial, which is relevant for storage, grid, and generation investment.

Quote: "The country has committed to moving away from it in the next few decades; growth in solar and wind generation will play a key role in this."