The power grid does not have sufficient power to charge the batteries quickly enough, therefore they also use batteries on dock as a buffer.
The batteries are delivered by Corvus.
Pack: 160 x 6.5 kWh (vessel) + 2 x 63 x 6,5 kWh (shore stations)
Capacity: 1.0 MWh (vessel) + 2 x 410 kWh (shore...