How Greece Constructs a €650M Water Battery on a Mountain — Behind Schedule

Greece is building a €650 million "water battery"—a pumped-storage hydropower station—in the mountains of Amfilochia in the west of the country. The plan is to pump water up to a reservoir at 285 meters above ground level, storing solar power during off-peak hours and releasing the water to generate electricity during peak demand. The project is seen as a key piece of Greece's energy transition puzzle, but construction is already behind schedule, with cost pressures and engineering challenges adding to the strain. Using this "water going uphill" project as its entry point, this guide walks through how pumped storage smooths out the fluctuations of renewable energy, why mountainous terrain is chosen for such projects, and the real-world obstacles behind the delays. It suits viewers interested in European green infrastructure, energy storage technology, and large-scale project management, as well as beginners who want to quickly grasp how a "water battery" works. For the best experience, it helps to first understand the basics of solar curtailment and grid peak shaving; then, watching the on-site footage and expert interviews will make the strategic weight of the project easier to appreciate. The total runtime is unknown; the first ten minutes, which cover site selection and the working principle, are a good place to start, with the finer details best saved for later.