TenneT, the Dutch national grid operator, has certified the Greener battery systems for grid balancing solutions. Apart from offering Frequency Containment Reserve (FCR –R1) capacity, the mobile Greener batteries are also able to participate in a Frequency Restoration Reserve (FRR –R2) bidding. This allows the Greener batteries to restore the power balance of the grid y, within a maximum of 30 seconds when necessary. Additionally, they can act as a FRR within a maximum of five minutes. This is the secondary reserve and therefore takes over after the FCR. This makes our batteries ideal for alleviating grid imbalances.