NOVELTY - The panel array support assembly has upper panel holding structure which is detachably mounted to the lower support joist (20). The slidable upper arm is provided in the upper panel holding structure. The fixed lower arm is set parallel to the slidable upper arm so as to receive the external panel (12).    USE - Support assembly for array of solar panel.    ADVANTAGE - The panels can be easily mounted in the support structure while preventing the damage of panels. The structure of the solar panel support system can be simplified while facilitating a precise configuration of support system. The solar panel support system can be assembled quickly on site. The solar panel support system can achieve close tolerances during field installation without the necessity of skilled on-site labor. The solar panel support system can be easily adapted to a wide variety of solar panel array sizes and shapes. The necessity for precise measurements at the installation site can be prevented. The support system can be arranged at a variety of different positions and exposure angles. The solar panel support system can be configured to specific environment. The degradation caused by metal-metal contact in the solar panel support system can be reduced. The solar panel support system in which the accommodation is made for movement caused by changes in the temperatures, humidity or other environmental considerations, can be provided. Simplified connection system for solar panels can be provided. The installation and removal of the solar panels with respect to the adjacent frameworks can be performed easily. Easier installation of adjacent panel support systems can be facilitated without interfering with the previously installed panels. The deployment of several support structures on wide variety of different substrates can be permitted. The panel mounting system is entirely self contained with own installation interface. Quick and secure mounting of panels can be facilitated when the support system is deployed. The support system can accommodate flexing, sagging and other deformation of panels. The panel mounting system can facilitate increased panel clip capacity. Safe tightening of panel clips can be facilitated. The support rails can ensure secure panel connection. The manufacturing cost of the panel support structures can be reduced by reducing the overall length of the structural aluminum. The stability and strength of the panel support structure can be improved.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of the solar panel.    Support array (10)    Panel (12)    Lower support joist (20)    Substrate (100)    Support clip (400)