Abstract: The present invention is directed to a portable spa having a tray for centralized mounting of the various spa components. More specifically, the invention provides a portable spa or hot tub that utilizes a mounting tray for connection of the various spa components, including the ozonator, heater, control panel, and electrical connection interface. The tray is mounted to a support frame within a cavity residing between the spa tub and enclosure formed from exterior panels. The tray includes an arrangement of bays, wherein each bay is specifically dimensioned to receive a particular spa component and secure the component in a force fit. The bay arrangement includes a first bay that receives an electrical connection interface box or junction box. The mounting tray also includes a second bay that receives the control panel, a third bay that receives an ozonator, and a fourth bay that receives a heater and valves.