Feature: 1. MPPT Algorithm: The maximum power tracking algorithm can significantly improve the energy efficiency of the system, and the charging efficiency is 30% higher than that of the PWM method. 2. Features: Locate better operating point of the I‑V curve at a high speed, faster response speed and higher tracking efficiency, MPPT tracking efficiency is as high as 99.9%, and circuit energy conversion efficiency is as high as 98%. 3. Comprehensive Electronic Protection Functions: Features battery reverse connection protection, PV reverse connection protection, PV short circuit protection, charging overcurrent protection. How to Use: After the installation is fixed, connect the battery (not included) and the solar panel (not included) and then you can use it. Specification: Item Type: Solar Charge Controller Material: ABS Charging Type: MPPT Rated Voltage: DC 12V/24V AUTO Charging Current: 40A Discharge Current: 20A Rated Power: 12V/550W; 24V/1100W Working Temperature: -35℃ to +45℃ Protection Level: IP32 Communication Method: RS485 Conversion Efficiency: ≤98% MPPT Tracking Efficiency: >99% Altitude: ≤3000M Applicable Scenarios: Solar systems for home use, base stations, off-grid, power stations, RVs, yachts, ships, etc. Package List: 1 x Solar Charge Controller 1 x Manual 1 x Wiring Harness