Nacelle for a wind turbine

A wind turbine nacelle configured for mounting on a wind turbine tower and housing a rotor-supporting assembly supporting a rotor, the nacelle further housing a power conversion assembly, the nacelle comprising:

• a main unit arranged to be connected to the wind turbine tower and housing the rotor-supporting assembly, and
• at least one auxiliary unit housing an operative component forming part of the power conversion assembly, the at least one auxiliary unit including a bottom face, four side faces, and a roof part that together define an interior space,
• wherein the main unit and the auxiliary unit are separate units configured to be connected by a unit fixation structure at an interface, and
• wherein the at least one auxiliary unit has a first height defined by a greatest height of the roof part in an assembled configuration and a second height defined by a greatest height of the roof part in a transportation configuration, the first height being higher than the second height to increase the interior space.