About Wattlas

Wattlas turns open European electricity-market data into short views of when, where and how much the price of power moves. It centres on Germany (the DE-LU bidding zone, an area with one wholesale price that Germany shares with Luxembourg) and its neighbours: France, the Netherlands, Belgium, Poland, Austria, western Denmark (the price area bordering Germany) and the Nordics. Spain and Italy's northern bidding zone (the price area around Milan) join them for comparison.

Who builds this

Sebastian Knödel builds Wattlas in Stuttgart. Twenty years of industrial software, from the research bench to the production line. Wattlas and StockScore are his independent practice, built end to end with Claude doing the typing and a human keeping the gates. He favours renewables, and builds every view so that a reader who argues for nuclear finds their strongest number on the same page. More at sekond.de and on LinkedIn. To ask a question or describe what you're working on, use the contact form.

Why it exists

It started as a way to learn how European power markets publish their data, and grew into short views on prices, the grid, bills, electric vehicles, data centres and the build-out of wind and solar.

Not advice

Wattlas is an independent open-data project; the views are free, and custom work is available on request. It makes no investment or trading recommendations, and nothing here should be read as financial advice. See the Terms and disclaimer.

How it's built

Open-data APIs feed a Python pipeline that computes every figure in advance and saves it as small JSON files; the pages read those files directly, with no server generating a page or a number on the fly. Where a regulator publishes a total, the site's figure is checked against it and the difference is stated. Three parts send data to a small server function: a question to the on-page assistant, a message sent through the contact form, and a sign-up to the monthly newsletter or alerts. All three are described on the Privacy page. The engineering, with the assistant in detail, is on the How it's built page. Everything else on the site stays static. The full method is on the How it works page.