A service vehicle with center drive, method, and system thereof

A service vehicle for operating on a grid of an automated storage and retrieval system, wherein the automated storage retrieval system comprises a rail system comprising a first set of parallel rails arranged to guide movement of a container handling vehicle in a first direction (X) across the top of a frame structure, and a second set of parallel rails arranged perpendicular to the first set of rails to guide movement of the container handling vehicle in a second direction (Y) which is perpendicular to the first direction (X), the first and second sets of parallel rails dividing the rail system into a plurality of grid cells, wherein the service vehicle comprises a base with a set of wheels for traveling in first direction (X) and a set of wheels for traveling in the second (Y) direction, the base providing a platform for an operator, and a mechanism for changing the direction of travel, wherein the service vehicle comprises: a drive unit mounted to a rotatable platform part, the drive unit comprising a foot