A clamping system for securing the corners of four photovoltaic modules to a carport purlin, the clamping system having upper and lower body portions with an adjustable set screw between, the gap dimensioned to receive the purlin therein and the set screw rotatable to secure the purlin to the upper body portion. The system also having a pair of PV module connectors at opposite ends of the clamping assembly, each PV module connector adapted to secure a pair of PV modules to the purlin.