Hoymiles HT10 is a rapid shutdown system designed to enhance the safety of your solar PV system. It enables rapid shutdown of the PV system in emergency situations, ensuring the safety of firefighters and other first responders. The system consists of a transmitter, a power supply, and one or two cores. The transmitter communicates with the inverter and initiates the rapid shutdown process when necessary. The cores are used to pass either positive or negative homerun through them, effectively isolating the PV system from the grid.