Gabriel Ziembicki
I work on energy analytics and data engineering. This is where I write about things I build, learn, and find interesting.
Recent posts
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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.
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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.
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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.
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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.
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Why Batteries Change the Math for Solar in Poland
Co-located BESS lifts solar revenue by up to 61% and sharply reduces day-to-day volatility. A data-driven look at what storage actually does for PV economics and bankability in the Polish power market.