Abstract: A coupling clamp is provided that includes a top clamp and a bottom clamp. The top clamp may include a top vertical flange and a top lateral flange. The bottom clamp may include a bottom vertical flange and one or more bottom lateral flanges that extend laterally in opposite directions. At least one of the bottom lateral flanges may include a first portion having a surface configured to engage with a solar module and a second portion connected to the bottom vertical flange at an intersection below the surface of the first portion. The coupling clamp may be installed onto one or more solar modules that are positioned onto a rail that has an installed rail clamp. Another solar module may be positioned on the coupling clamp and rail and then slid under the rail clamp, which may be tightened to secure the other solar module to the rail.