Ember launches monthly wind and solar capacity dataset

Ember is excited to release a new monthly dataset tracking the rapid deployment of wind and solar power, the world’s fastest growing energy sources.

This new dataset provides the latest country-level figures on monthly wind and solar capacity installations – to help policymakers and analysts keep up with the accelerating pace of the energy transition.

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“We believe that transparent, reliable data is essential to shaping smart policies that enable a clean, secure, and affordable energy future. With this new dataset, we hope to help policymakers, analysts, and the public stay ahead of the curve—and on track for a clean, flexible power system.”

Sam Hawkins
‍Data Programme Director, Ember

Why wind and solar

Wind and solar power have grown faster than many predicted. Solar power has grown faster than any other source in history while wind power ranks as the second fastest growing source of electricity of all time.

In recent years, solar power in particular has grown rapidly across the globe. Brazil’s total solar capacity grew more than tenfold in five years, reaching 70.6 GW in January 2025. China’s solar capacity, alone, surpassed 1 TW in December of 2024 – a milestone the entire world only reached at the end of 2022.

Timely, open data matters

The continued rapid expansion of solar and wind is transforming the global power sector, with far-reaching implications on investment decisions, electricity prices, energy security, fossil fuel imports and global power sector emissions. The pace of change in solar and wind installations has become so rapid that it requires more regular and up-to-date figures – over and above existing annual datasets.

This is why Ember is publishing a dataset of installed wind and solar capacity, updated every month with the latest available data for each country. As Ember has proven through its dataset of monthly electricity generation, curated, comparable, timely and reliable data is essential to provide policymakers and analysts with the information they need to make informed decisions.

The new dataset initially covers capacity data for 25 countries, representing 93% of global installed solar and 92% of total installed wind capacity. The data is drawn from the best available sources for each country, including transmission system operators and government statistics.

“This is just the start,” says Sam Hawkins, Data Programme Director at Ember. “We plan to expand the dataset toward full global coverage.”

As with all of Ember’s data, this release is completely open source and will soon be accessible through Ember’s API. This data sits alongside existing datasets on yearly and monthly electricity generation, electricity prices, exports of solar modules and many others provided by Ember, helping build a more complete picture of the global electricity transition.

With the dataset, we also provide a full methodology. We welcome any feedback, questions or recommendations on any aspect of the data and our methodology.