During periods of downtime, the AGVs dock at the charging stations to stabilise the mains supply frequency, either collecting surplus energy from the power grid or feeding energy back as a primary reserve. HHLA is making an important contribution to the success of the energy transition with these measures. To be able to temporarily provide reserve power of a maximum of 4 megawatts to the power market, HHLA is setting up twice as many charging stations at Container Terminal Altenwerder as are logistically necessary.