DATA TRANSPARENCY

Market Data Project methodology

This page documents where STR Energy Market Data Project values come from, which transformations are applied, and when the data should not be used.

Methodology version 1.0 · Last reviewed 2 September 2026

Primary data sources

EPİAŞ Transparency Platform

The Türkiye view queries EPİAŞ services for market clearing price, intraday weighted-average price, YEKDEM unit cost, real-time generation and load-estimation plan data.

EPİAŞ Transparency Platform

ENTSO-E Transparency Platform

The European view retrieves day-ahead prices, actual generation, actual load and cross-border physical flows for the selected country or bidding zone.

ENTSO-E Transparency Platform

U.S. Energy Information Administration

The global view uses EIA international series for generation, consumption, installed capacity, electricity prices and energy-related CO₂ by country and year.

U.S. Energy Information Administration

Processing from query to table

1. Validate the request

The source, dataset, geography and period are validated server-side. Türkiye queries are limited to 31-day windows; invalid or disallowed requests are not sent upstream.

2. Query the official source

STR Energy’s server forwards the request to the official provider without exposing credentials to the browser. Timeouts and temporary failures use a small, bounded retry policy.

3. Map the schema

Provider field names, timestamps and numeric values are mapped to readable table columns. The interface does not invent a value that the source did not publish, and missing records are not treated as equivalent to measured zero.

4. Present and export

Numbers are formatted for the selected language. Excel exports identify the dataset, date range, source, generation time and record count in their header.

Freshness and failure behaviour

Data is requested from the official source when a user runs a query, and the interface displays the last-query time. If a source returns no rows or cannot be reached, the system does not generate sample or synthetic values; it shows an empty state or an error. Providers may revise historical series, so the same period can legitimately change later.

Comparison limits

  • Check time zones and daylight-saving transitions before comparing hourly data across countries.
  • MW power, MWh energy and a cumulative meter index are not interchangeable.
  • Price series can differ by currency, taxes, network charges and market product; these tables are not a final electricity bill.
  • For generation and emissions, review net/gross definitions, sector boundaries and revision status in the provider documentation.
  • The visualisations are for education and research. Confirm official records before trading, investment or regulatory decisions.

Reproducing a result

Record the region, dataset, geography and period, then run the same scope on the linked official platform. If values differ, check time zone, revision status, units and bidding-zone definitions. Include those four selections and the query time when reporting a problem.