The MPXS250-60S-L extension box is designed to work with the MPSL250-60S Magnum panel. This model is designed to mount on the left hand side of the enclosure. The MPX Series Extension Boxes allow additional Magnum inverters to be mounted with and connected to the MP Series Systems Panels. The top of the MPX is designed to allow Magnum inverters to fit seamlessly into the top. It comes with the AC and DC breakers and wiring to install another Magnum Inverter. An inverter hood (not shown) is also included with each MPX extension to allow the inverter to be mounted vertically.