Poland's grid at 46% renewable — what a year of 15-minute data reveals

Mon, 20 Apr 2026 00:00:00 +0000

Poland’s energy transition is further along than most people think. I downloaded a year of system data from PSE (the Polish grid operator) and URE (the energy regulator) and crunched the numbers. 35,040 data points at 15-minute resolution, April 2025 through April 2026.

The headline: renewables already cover 45.8% of Poland’s electricity demand on average. Over a third of all hours, that number exceeds 50%. On one sunny Sunday in April 2026, it briefly hit 103%.

Here’s what else the data shows — some of it surprising.

Renewables on homeio.org

Poland's grid at 46% renewable — what a year of 15-minute data reveals