(US5746839-A)      The photovoltaic modules (104,106,108) are placed on top of a conventional building rooftop (102). Pre-formed interlocking spacers, pedestals or supports (112,114,116,118,120,122) are placed below respective modules. The spacers define passageways beneath the modules. Access openings couple the passageways to the top surface of the modules. The openings extend along at least one side of the modules to reduce uplift forces on the modules.    The rooftop is supported on conventional roof framing, attached to it by conventional means. There may be insulation blocks (322) below the spacers.    ADVANTAGE -   Eliminates need for roof penetration to resist forces of wind uplift. Lightweight. Self-ballasting. Easily assembled.    (EP892877-A1)      The photovoltaic modules (104,106,108) are placed on top of a conventional building rooftop (102). Pre-formed interlocking spacers, pedestals or supports (112,114,116,118,120,122) are placed below respective modules. The spacers define passageways beneath the modules. Access openings couple the passageways to the top surface of the modules. The openings extend along at least one side of the modules to reduce uplift forces on the modules.    The rooftop is supported on conventional roof framing, attached to it by conventional means. There may be insulation blocks (322) below the spacers.    ADVANTAGE -   Eliminates need for roof penetration to resist forces of wind uplift. Lightweight. Self-ballasting. Easily assembled.    (JP2000508393-W)      The photovoltaic modules (104,106,108) are placed on top of a conventional building rooftop (102). Pre-formed interlocking spacers, pedestals or supports (112,114,116,118,120,122) are placed below respective modules. The spacers define passageways beneath the modules. Access openings couple the passageways to the top surface of the modules. The openings extend along at least one side of the modules to reduce uplift forces on the modules.    The rooftop is supported on conventional roof framing, attached to it by conventional means. There may be insulation blocks (322) below the spacers.    ADVANTAGE -   Eliminates need for roof penetration to resist forces of wind uplift. Lightweight. Self-ballasting. Easily assembled.