ABOUT REESSAREESSA Consulting UG (Ltd) is a young consulting company. We advise investors and operators of energy storage facilities worldwide. We specialize in pumped storage systems. Inadditiontotechnicaldesignandoperationalmanagement,wehavespecializedinmarketsimulationandmarketforecastinginrecentyears. Eachofourprojectsisalwaysviewedinatechnicalandeconomicmarketcontext.Onlythenaremeaningfulandlong-terminvestmentdecisions possible in a rapidly changing market. Wewereabletotransfertheexperiencegainedfromthetechnicallyandeconomicallycomplexanalysesofpumpedstorageprojectstoother storage technologies. Our goal is to accompany the development of the global storage markets and to optimize projects. We do not advise in order to provide advice, but rather to support projects of which we are convinced in a targeted manner. TobiasDertmann(MSc)isthefounderandmanagingdirectorofREESSAConsulting.Afterstudyingmechanicalengineeringwithafocuson renewableenergies,hebeganhisprofessionalcareeratVattenfallEurope.Thereheworkedinthepumpstoragetechnologydepartment.Hewas involvedintheplanningforthenewbuildingconceptofthePSPNiederwarthaandinthedevelopmentandimplementationofthevirtualpumped storagepowerplantofVattenfallHydrowithatotalcontrolcapacityof+/-2800MW.Technicaloptimisationandmarketanalysesinthespreadand controlpowerrangewasoneofhismainareasofexpertise.In2016,heworkedforthegovernmentinGuyana(SouthAmerica)for3years, helpingtodevelopandbuildhydropowerprojects.Since2017hehasbeenworkingonthedevelopmentofREESSAConsultingandfoundeditin 2019.