Features High Efficiency: The Tracking Efficiency of Mppt Is As High As 99%, So This Mppt Solar Charge Controller Enables Better Control Over The Charging of Ternary Lithium Battery, Lithium Iron Phosphate Battery, Etc. Stable Operation: Using High Frequency Switch Mosfets With Extremely Low Conduction Resistance, Which Greatly Improves Converter Efficiency, Reduces The Temperature of The Entire Machine Casing, And Achieves The Smallest Casing to Achieve Greater Power Buck Controller: The output Voltage Can Be Adjusted Between 10-30v, with A Button Step Size of 0.1v. And The Input Is 17-55v. Also Has Clear Lcd Display. Auto Heat Dissipation: When The Internal Temperature of The Mppt Controller Exceeds 65℃ Or The Charging Current Exceeds 30a, The Mppt Controller Will Automatically Turn on The Fan. When The Internal Temperature of The Mppt Controller Drops Below 45℃, Wide Application: Adopting premium cast aluminum for Heat Dissipation, Ensuring Reliable And Efficient Operation In Various Working Environments. Widely Used In Solar Cars, Solar Monitoring, Household Solar Panels, Rv Energy Storage Power Supplies, Etc. Specification: Item Type: MPPT Solar Charge Controller Material: Cast Aluminum Alloy Supporting Battery: For ternary lithium battery, lithium iron phosphate battery. Maximum Photovoltaic Output Power: 600W Input Voltage: 17-55V Output Voltage: 10-30V Output Current: 40A at 12V, 20A at 24V. Protection Level: IP65 Noise: < 55dB Package List: 1 x MPPT Solar Charge Controller 1 x Relay 1 x User Manual Note: 1. It is prohibited to connect the positive and negative poles in reverse. Do not short circuit the positive and negative poles or cables of the battery.2. The controller is installed at an ambient temperature of ‑20℃ ~ 60℃ to ensure the optimal working environment.3. Do not install the controller in a place directly exposed to sunlight. Package List 1 x MPPT Solar Charge Controller 1 x Relay 1 x User Manual