There are various methods to detect failures and defects in a PV system. This article explores the positive and negative aspects of these methods. Failures & Defects in PV Systems: Typical Methods for Detecting Defects and Failures.
A dual-axis tracker is a device that tracks the sun's movement along two axes (horizontal and vertical) to maximize the amount of sunlight captured by solar panels.
An MPPT solar inverter (Maximum Power Point Tracking solar inverter) is a power conversion device that continuously adjusts the operating voltage and current of photovoltaic (PV) panels to ensure they operate at their maximum power point under changing sunlight and temperature.
Solar panels are rated for hail impact which is roughly the impact of a 1" hail ball striking the panel at 52 mph. The tempered glass protects the solar cells under this type of impact.