Specifications include, but are not limited to: Fronius, Model #: Fronius Primo 15.0-1 208-240, Part #'s:4,210,078,800 (String Inverter); 42,0201,4479 (Copper Bus Bar DC+); 42,0201,4480 (Copper Bus Bar DC-); 42,0405,2020 (Blanking Cover) ; : Unirac, Model Number: RM10 Ballast Bay, Part Number: 310710. ; Supply and deliver hex bolt; Manufacturer: Unirac, Model Number: RM10 Hex Bolt Clip Bulk Pack, Part Number: 310751. ; Supply and deliver roof pad; Manufacturer: Unirac, Model Number: RM10 Roof Pad, Part Number: 310760 ; - Ballast Blocks (Pavers) must meet the following specifications: Ballast Blocks (Pavers) size: 4 inch x 8 inch x 16 inch; weight per block: 32 lbs (nominal); Color: standard grey. Blocks to be freeze-thaw resistant.