Abstract: Apparatuses and methods for installation of solar panels on a support structure, comprising a solar panel assembly constructed on a mounting tray assembly, the solar panel assembly moved into position on the support structure using a mated cradle assembly, or a connected lift assembly using lift plates, thereby significantly reducing manpower required for solar panel installation, potential worker injury and damage to solar panels. The solar panel assembly generally comprises a plurality of solar panels, a solar panel tube and brackets for attaching the solar panels to the solar panel tube. The mounting tray assembly generally comprises a tray frame, tray tube and tripod assemblies with casters for moving the mounting tray assembly and solar panel assembly. The cradle assembly generally comprises fork tubes and end plates with cutouts to mate with the solar panel tube. The lift apparatus typically comprises a crossbar, lifting lugs, straps, clips, and panel straps.