Hjörtur Páll Hjartar
Welcome. The energy system that powers our daily lives is in the middle of a generational transition. Fast-scaling electrification is mixing with legacy fossil-fuel assets in order to feed a system that must deliver cheap, clean and secure energy.
I have spent nearly a decade working in energy and infrastructure. I made this site to share some of the work I've done unpacking the complexities of that transition, using AI tools to analyse a curated dataset.
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Heartbeat of Europe
A guided tour through the European power grid. Demand, the wires, and the fuels that make the stack — wind, solar, batteries, hydro, gas, nuclear, coal — across a live week of hourly data.
Below Zero
European power markets clear below zero increasingly often, and accumulated exposure has nearly doubled since 2023. Friday 1 May 2026 — when nine continental markets sat near the algorithm's floor through midday, all hitting it for the same quarter-hour — anchors the geography. The piece zooms out to multi-year severity, who absorbs the cost, and the levers that close the gap.