Feature: 1. CORE CONTROL FUNCTION: Real time monitoring of solar panel power generation, and tracking of the highest voltage and current values (VI), so that the system can charge the battery at maximum power. Designed for off grid solar photovoltaic system to coordinate the operation of solar panels, batteries and loads as the core control unit of the off grid photovoltaic system 2. IMPROVE EFFICIENCY: Built in maximum power point tracking algorithm can significantly improve the energy utilization rate of the photovoltaic system, and increase the charging efficiency by 15%‑20% compared with the traditional PWM method 3. HIGH CONVERSION RATE: The product boasts an optimal MPPT tracking efficiency of up to 99.9%, and advanced digital power technology increases the energy conversion efficiency of the circuit to 98% 4. AUTOMATIC CONTROL: Controller can provide charging options for different types of batteries, including gel batteries, sealed batteries, elastic batteries, lithium batteries, etc. Adopts limited current charging mode. When the solar panel power exceeds a certain level and the charging current is higher than the rated current, the controller will automatically reduce the charging power to make the charging current reach the rated value 5. CLEAR DISPLAY: The LCD screen can dynamically display the running state, running parameters, controller logs, control parameters and so on. Users can easily check the parameters by pressing buttons and modify the control parameters according to different system requirements 6. ADJUSTABLE AND MONITORING: The controller uses standard communication protocols, allowing users to easily check and modify system parameters themselves. In addition, by providing free monitoring software, give users greatest convenience to meet their various needs for remote monitoring 7. SELF CHECK PROTECTION: Possess comprehensive electronic fault self detection function and powerful electronic protection function built in the controller, which can avoid component damage caused by installation error or system failure to greatest extent Specification: Item Type: MPPT Solar Charge Controller Material: Aluminum alloy and PC Battery Voltage: 12V/24V (automatic) No Load Loss: 0.7W-1.2W Battery Voltage: 9V-35V Rated Charging Current: 30A Rated Discharge Current: 20A Photovoltaic System Maximum Power: 400W (12V), 800W (24V) Maximum Load Power: 240W (12V), 480W (24V) Maximum Load Capacity: 10000μF Communication Mode: RS232 or RS485 Solar Panel Maximum Voltage: 100V (25℃), 90V (-25℃) Altitude: ≤3000m. Package List: 1 x Solar Controller1 x Temperature Sensing Line1 x User Manual