Advanced MPPT scanning technology & effective temperature management, ensuring efficient, reliable and lasting solar DC charge Oversize heating sink design, along with PCBA glued with polyurethane & silicon mixture, for better system cooling and waterproof, to improve solar charge efficiency Built-in Bluetooth communication module allowed to be connected in, for APP monitoring and operation in mobile phone Supports multiple modes of DC load output control. "DC load short circuit protection" allowed to be canceled manually; "Equalize charge" allowed to be enforced manually The installation is simple and convenient, and the markings are clear and clear; humanized button settings make the operation simpler and more comfortable. System voltage: 12V/24V No-load loss: 12MA (12V); 10MA (24V) Rated charging current: 20A Rated discharge current: 20A Maximum input power of photovoltaic system: 300W/2V; 600W/24V Solar maximum input voltage: Less than 100VOC Battery type: sealed, gel, open, carp battery Communication method: RS485 (MODBUS) built-in Bluetooth Product size: 180 x 140 x 71MM color: Black Material: aluminum Package Contents: 1 x MPPT Solar Controller 1 x English manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.