A decentralised, flexible energy system puts energy consumers at the fore-front of the clean energy transition. Through demand-side flexibility, consumers are able to adjust their consumption, store energy, and inject energy into the grid during peak moments, contributing to a more efficient and sustainable decarbonisation pathway. smartEn has calculated that, with help from flexible consumers, in 2030 the EU energy system could avoid 15.5 TWh in renewable energy curtailment, a 61% improvement compared to if no action is taken, and avoid investments in 60 GW of peak generation capacity, equivalent to 137 gas peaking plants, resulting in €2.7 billion saved annually. This session aims to deep-dive into how decentralised assets such as PV, Stationary and Mobile storage, amongst others, are key to reducing costs for consumers, increasing the uptake of renewables and solving grid congestion issues.