This report investigates the performance indicators for electrolysers performing grid services as defined in the testing protocols and derived from the economic analysis in the project QualyGridS. It selects the three primary performance indicators that determine if or if not an electrolyser can do the most relevant electricity grid services. It then compares these primary performance indicators to the KPIs defined by FCH-JU in their MAWP and makes a link between the primary performance indicators for grid services and the FCH-JU KPIs. Target numbers for the primary performance indicators are given and primary performance indicators that cannot be derived from the FCH-JU KIPs are identified.