That looks like a commercial lighting control panel!panel in the garage - components under tank. ~25' away. Had to run 1-1/4" 2x out of garage and back into room behind tank. No over/under access in this room. The conduits enter the grey j-boxes under the tank. One for line voltage and the other for control wiring to panel.
Edit, guess I need to get a new picture under tank - it has grown some since this pic.