A modular solar racking system comprises a plurality of modular solar rack supports that interconnect to provide a portable, non-invasive solar electrical generation system. One embodiment comprises a plastic modular solar rack support having a base portion, a ballast holding portion, a strut and a wedge portion. Supports are interconnected by fitting within grooves in the strut. Uni-strut frames are attached to the supports and solar panels are mounted thereon. In another embodiment, the supports comprise a base portion, a ballast holding portion, a forward lifting portion, a rearward lifting portion and a strut. Again, supports are interconnected by fitting within grooves disposed in the strut. The supports are stackable and are installed on-site using a torque wrench. Ballast may be used to hold the supports down. In one embodiment, a membrane is applied to the bottom surface which is used to adhere the support to a surface.