A camera assembly includes: a camera having a field of view (FOV); an energy storage device; an energy collector, configured to charge the energy storage device; a wireless communications interface; a controller configured to: (i) detect a capture initiation condition; (ii) in response to detecting the capture initiation condition, control the camera to capture an image; and (iii) control the wireless communications interface to transmit the image; and a housing supporting the camera, the energy storage device, the energy collector, the wireless communications interface, and the controller; the housing configured for coupling to a first support structure to direct the FOV of the camera towards a second support structure supporting a plurality of items.