Abstract: Adapter clamps and systems that include adapter clamps for facilitating installation of photovoltaic (PV) components to a cylindrical pile are provided. In one embodiment, an adapter clamp may include a first arm configured to be secured to a first side of the cylindrical pile. The first arm may have edges that are configured to create Hertzian contacts with an outer surface of the cylindrical pile, and a mounting surface configured for coupling a first PV component. The adapter clamp may include a second arm configured to be secured to a second side of the cylindrical pile. The adapter clamp may further include a fastener configured to secure the first arm to the second arm and decrease a distance therebetween in order to create a frictional attachment between the first and second arms and the cylindrical pile.