This MPPT solar controller is maily designed for high voltage system, 24V/48V/96V/120V/192V/216V/240V/360V/384V/480V. It uses IGBTs for array anti-reverse, multi-tube parallel IGBTs form a BUCK circuit for voltage and current conversion control; output fuses are used for output over-current and short-circuit protection, and high-voltage DC relays are used for battery reverse connection protection. Support WIFI/GPRS module expansion to achieve APP cloud monitoring.