Gabriel Ziembicki

Writing

Notes on energy markets, data engineering, and whatever I'm building.

2026

19 Feb

Solar Cannibalization in Poland: How Capture Factors Erode as Renewables Scale

Solar capture factors in Poland have fallen below 50% in peak months — and the decline accelerates with penetration. A two-dimensional look at how both solar volume and wind output shape PV revenues, and what the curve ahead looks like.
28 Jan

When Wind and Sun Both Disappear: Joint Renewable Scarcity and Prices in Poland

Days with low wind and low solar are not rare — they are a recurring regime in Poland that drives the highest wholesale prices. Residual load, not total demand, is the real scarcity signal.
20 Jan

Poland's Electricity Demand: What Temperature and Ramps Tell Us About System Stress

Electricity demand in Poland follows a clear temperature curve with a comfort minimum around 19°C. But peak load is only half the story — residual-load ramps exceeding 4 GW per hour reveal where real system flexibility is tested.
04 Jan

Poland's Solar Map: Where Capacity Is Concentrating and Why Location Matters

Poland now has a nationwide solar fleet — but capacity is clustering, not spreading evenly. The top 1% of installations account for 28% of capacity. Geographic concentration drives correlated output, congestion risk, and curtailment exposure.

2025