The current upheaval in the share between regulating and non-regulating means of electric power generation is leading the European authorities to prepare the networks of the future, in particular their continuity of service and the quality of frequency and voltage. In this general global context, XFLEX Hydro is proposing to implement and test innovative operating flexibility levers on hydroelectric facilities, through industrial full-scale demonstrators. One of the facilities includes the hybrid demonstrator located at Vogelgrun Run of River plant. There, XFLEX Hydro will show how Run of River plant, can still provide grid support (frequency primary control) together with an improved life expectancy of their main components. Indeed, primary frequency control could, eventually, be detrimental to some unit part either from fatigue or component wear. The hybrid demonstrator therefore intends to achieve: “more service, with less wear and tear”, by using a small size battery (Battery Energy Storage System: BESS) which is to operate in tandem with the original hydraulic unit. To achieve this goal, a control algorithm has been developed and implemented in a controller driving both hydro unit and BESS set points. Behavior of the hydro unit was simulated thanks to a numerical model running on SIMSEN software to achieve best efficiency scenario. Wear and Tear is assessed through data collection on hybrid and sister unit together with a digital clone. The demonstrator entered operation in August 2021 so that related data analytics are ongoing.