Abstract: A photovoltaic panel cartridge for mounting a plurality of photovoltaic panels and method of its construction are described. The photovoltaic panel cartridge is formed from a unitary frame with internal beams and struts for stability. The photovoltaic panels are inserted into channels within the frame, struts, and/or the internal beams in order to be mounted to the photovoltaic panel cartridge and secured to mounting regions on a different one of the frame, struts, and/or internal beams. The photovoltaic panel cartridge is configured to be stacked upon similarly configured photovoltaic panel cartridges for ease in transport and to reduce damage to the photovoltaic panels during transport. The photovoltaic panel cartridge may be slidably mounted to rails of a support structure.