Around 15,000 existing wind energy sites in Germany with currently 21.5 GW of capacity are considered repowering candidates—modern turbines could increase capacity to up to 64.5 GW with the same land use. Until repowering, the existing turbines—some over 20 years old—must be maintained reliably, with recurring inspections and often difficult access, especially offshore. Our blueprints show how maintenance intervals and inspection dates for existing assets can be planned with GreenGate software so that operations remain safe and fully documented until repowering.