The Hoymiles inverter is designed to operate within specific grid frequency limits, typically between 59.3 Hz and 60.5 Hz. When the grid frequency deviates from this range, the inverter will trigger a protective fault to prevent damage to both the inverter and the connected solar array. This is primarily governed by the inverter's internal logic, which continuously monitors grid conditions. If the inverter detects a frequency outside acceptable parameters, it will disconnect from the grid to ensure safety, as prolonged exposure to incorrect frequencies can lead to overheating or failure of internal components.