Explains why a power system dominated by variable renewables needs flexibility and how that flexibility is delivered. Sets the scene with the drivers — rising CO2 emissions and EU climate targets, the shift from controllable fossil base load to weather-dependent solar and wind, and the rapid electrification of transport, heating and industry that makes demand more variable too. Defines grid flexibility as the ability to keep supply and demand in balance at every moment, and breaks it down across two axes: timescale (short-term within a day, medium-term over days to weeks, long-term across seasons) and source (production, storage, consumption). Walks through concrete solutions on each side — supply-side storage (batteries, pumped hydro), flexible power stations and cross-border interconnections; demand-side behaviour change, smart devices that respond to price signals, and electric vehicles with smart charging and vehicle-to-grid. Closes with the EU policy landscape: the 2024 Electricity Market Design reform, the Affordable Energy Action Plan, and the 2025 Action Plan for the automotive industry pushing V2G and smart charging.
