Features: 1. 3‑stage PWM charge management, improve system efficiency and prolong the life span of the battery. 2. Solar controller has short-circuit protection, open-circuit protection,reverse protection, over-load protection. 3. LCD display that can clearly indicate the status and data, it can be conveniently switched modes and parameter configuration. 4. Two‑way MOS tube anti‑backflow circuit, high‑power charging mode, ultra‑low heat. 5. Charging 12V/24V battery, ultra‑wide charge and discharge adjustable, 12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels. Specification: Item Type: Solar Charge Controller Material: PVC Color: As shown in the picture Product Size: Approx. 13.3x6.8x3cm / 5.2x2.7x1.2in Weight: Approx. 145g / 5.1oz Rated Voltage: 12V 24V automatic (12V is suitable for 18V solar panels, 24V is suitable for 36V solar panels) Rated Current: 20A Charging Mode: 3 stages Function: Charge 12V/24V battery, ultra-wide charge and discharge adjustable Self-Consumption: <10MA Overcharge Protection: 14.4V/28.8V Floating Voltage: 13.7V/27.4V Over Discharge Protection: 10.7V/21.4V Over Discharge Recovery: 12.6V/25.2V Maximum Input Power: 240w (12v) 480w (24v) Package List: 1 x Solar Charge Controller 1 x Instruction Manual Features 3-stage PWM charge management: Enhance system efficiency and extend battery lifespan for reliable solar power. Comprehensive protection Features: Safeguard against short-circuits, reverse connection, open-circuits, and overloads to ensure safe and worry-free operation. Convenient LCD display: Easily monitor system status and data, and effortlessly switch modes and configure parameters for optimal performance. Two-way MOS tube anti-backflow circuit: Enable high-power charging with minimal heat generation, ensuring efficient and reliable operation. Versatile compatibility: Charge 12V and 24V batteries with adjustable charge and discharge settings, suitable for use with 18V and 36V solar panels respectively.