adjusted to accommodate more or less photovoltaic modules 102 depending on the application requirements the photovoltaic modules 102 are maintained within unitary frame 110 by a plurality of retaining brackets 140 a b at the ends of each row in addition to spacers 160 between adjacent photovoltaic modules 102 the unitized photovoltaic assembly 100 is secured to a surface 150 with repositionable mounting brackets 152 more specifically mounting brackets 152 are attached to the unitary frame 110 and bolted to mounting devices 156 the mounting devices 156 are pre installed to the surface 150 in accordance with local building codes in the present embodiment mounting devices 156 are bolted to rafters 154 various types of mounting devices 156 common within the industry may be utilized in some instances mounting devices 156 may not be necessary in which case mounting brackets 152 can be secured directly to the surface 150 also shown in fig1 are mounting interlocks 170 a b mounting interlocks 170 a b are secured to the unitary frame 110 and are used to mechanically interconnect adjacent unitized photovoltaic assemblies 100 to form a complete system because of mounting interlocks 170 a b various arrangements of unitized photovoltaic assemblies 100 can be created which have the added benefit of increased load sharing across the completed system fig2 shows unitary frame 110 in further detail without photovoltaic modules 102 the unitary frame 110 is comprised of a plurality of rails 104 mounted above and welded to a plurality of struts 106 at cross points 108 brackets or fasteners could also be used in place of welding to mount rails 104 to struts 106 fabrication in this manner creates a unified framework central to the.