# Agios Efstratios renewable energy transition

> Live situation record from CLSTR: https://clstr.news/situations/agios-efstratios-renewable-energy-transition
> Updated: 2026-10-22T18:04:59.000Z. Sources: 4. Developments: 2.

The Greek island of Agios Efstratios, also known as Ai Stratis, has transitioned toward energy autonomy through the ‘Ai Stratis – Green Island’ project. Financed by the European Union, the initiative utilizes a hybrid system comprising a 900 kW wind turbine, a 225 kW photovoltaic plant, and a 2.56 MWh battery storage system.

An automated real-time energy management system coordinates electricity distribution to the island’s residents. The project has achieved a 91% renewable electricity usage rate, which prevents approximately 1,000 tonnes of CO2 emissions annually. 

To manage surplus production, particularly during winter, excess energy is used for thermal heating and stored in four hot water tanks with a total capacity of 500 cubic meters. This system provides residents with low-cost heating without the need for traditional boilers.

## Timeline

### 2026-10-22: Agios Efstratios achieves energy autonomy through renewables

The Greek island of Agios Efstratios has reached energy autonomy using a hybrid system of wind, solar, and battery storage, reducing CO2 emissions by 1,000 tonnes per year.

2 sources. https://clstr.news/cluster/agios-efstratios-achieves-energy-autonomy-through-renewables

### 2026-10-12: Agios Efstratios achieves 91% renewable electricity usage

The Greek island of Agios Efstratios now generates 91% of its electricity from wind and solar power, significantly reducing CO2 emissions through an EU-funded hybrid energy project.

2 sources. https://clstr.news/cluster/agios-efstratios-achieves-91-renewable-electricity-usage

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Cite as: Agios Efstratios renewable energy transition. CLSTR, https://clstr.news/situations/agios-efstratios-renewable-energy-transition