Gabriel Ziembicki
I work on data and analytics for Poland's power markets and the energy transition. This is where I publish notes, charts, and longer pieces.
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Writing
2026
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What actually happens when Poland triggers a capacity market call
Poland's capacity market (rynek mocy) was called three times in the summer of 2026 — more than in the previous five years combined. I reconstruct the capacity market call trigger PSE publishes, compare the three call days with similarly stressed days on which no call was declared, and show which factors actually drove the margin shortfall.
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How Residual Load Shapes Wholesale Electricity Prices in Poland
Residual load — demand minus wind and solar — is the single best lens on Poland wholesale power prices from 2020 to 2025. Year-by-year evolution, the rise of negative prices, and the month × hour price-sensitivity surface that anchors what-if analysis.
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How much do Polish renewables actually earn? Solar and wind capture prices explained
What a MWh of Polish solar and wind actually earns, measured through capture price and capture factor. This post tracks how those numbers have moved since 2020, why wind and solar diverge, and what it means for project economics.
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Poland's electricity demand: what temperature and ramps tell us about system stress
Demand in Poland follows a clean two-regime temperature curve with a comfort minimum at 16.5°C and a heating-side slope of 0.213 GW/°C. Residual-load P99 1-hour ramps reached 3.22 GW in 2024–2025 and will likely grow further with PV. A quantitative look at both.