A wireless charging system for charging a tool includes a tool holder and charging module. The tool holder includes a mounting interface, a holding portion extending from the mounting interface, and at least one surface t configured to mount the tool holder onto a support surface, such as of a mobile structure. The charging module is mounted in the mounting interface, and includes an inductive charging device that wirelessly charges a tool resting on the charging module. The holding portion is configured to at least partially engage the tool and act as a transverse support relative to the mounting interface. The at least one surface can include a base of the tool holder for horizontal mounting, a side of the tool holder for vertical mounting, or two opposite sides of the tool holder for mounting on a mounting rail.