Disclosed embodiments include grid-tied thermal energy storage systems, concentrated solar power systems featuring grid-tied TES and methods of operating same. The inspection apparatus includes a scan mechanism. The device is further comprised of a divertor plate configured for receiving exhaust heat. Each anti-slip member includes a screw having a shank that threadedly engages the fastener hole in the recess in the distal part of one of the lateral walls, and an anti-slip block having an anchoring portion secured to a head of the screw, and a contact portion that projects upwardly relative to the top side of the left and right lateral walls. In addition, by employing a CVD method for forming the HfO2 layer, it is possible to obtain a high K gate dielectric with excellent leakage current characteristic as well as a low interface state with both a gate electrode and a semiconductor substrate.