Feature: 1. Innovative MPPT Technology: This solar charger controller utilizes innovative MPPT technology with a tracking efficiency of up to 99% and a peak conversion efficiency of up to 98%. 2. Programmable LCD Display: This solar charger controller features a programmable LCD display with clear backlighting for clearer operation. 3. Good Heat Dissipation: This solar charger controller is designed with multiple pronged edges, which increases the heat dissipation area and has good heat dissipation performance. 4. Multiple Protection Functions: This solar charger controller has multiple protection functions, such as overcharging and over discharging protection, short circuit open circuit reverse connection protection, over current protection, overheating temperature protection. 5. Wide Application: This solar charger controller has a wide range of applications and can be used for RVs, trailers, boats, ships, campgrounds, homes. Specification: Item Type: MPPT Solar Controller Material: Aluminum Alloy No Load Loss: 0.4W Conversion Efficiency: 98% MPPT Tracking Efficiency: 99% Temperature Compensation Coefficient: -2mv/, 2V Default Value Operating Temperature: -10-65 Protection Grade: IP21 Battery Compatibility: Comply with EN61000, EN55022, EN55024 Altitude: 3000m. Package List: 1 x MPPT Solar Controller4 x Screw4 x Expansion Tube