Solar Controller 40A PWM Why you need this controller Keeps battery charging balanced and regular with an upgraded 3stage PWM charging algorithm, helping prevent sulfation and stateofcharge imbalance. Protects connected batteries and loads with multiple safety features, reducing the risk of damage from overcharge, deep discharge, overload, or short circuit. Simple monitoring and configuration through a graphical LCD and intuitive twobutton interface, plus remote connectivity for flexible system management. Key benefits and problem solving Reliable charging: The 3stage PWM algorithm delivers bulk, absorption, and float stages to maintain battery health and improve charging consistency. Automatic system setup: Automatically detects 12V or 24V battery systems, so installation is faster and less errorprone. Flexible load control: Multiple load working modes allow the controller to adapt to lighting, timing, and other load requirements. Safetyfirst protection: Builtin safeguards include overvoltage, overdischarge, overload, short circuit protection and a TVS arrester to stabilize operation under fault conditions. Remote monitoring and energy saving: RJ12 data port provides connectivity to monitoring software or mobile apps for parameter adjustment and powersaving modes. Standout features 40A continuous charging current for offgrid solar setups. Supports 12V systems up to 600W and 24V systems up to 1200W with solar input voltage below 55V. Integrated USB output: 5V 1A for small device charging or auxiliary power. Graphical LCD plus simple humanmachine interface with two buttons for clear information and easy configuration. Temperature compensation to adjust charging behavior based on ambient temperature, improving battery response in different climates. Compact, durable ABS housing with IP30 protection rating for indoor protected installations. Specifications Item type: Solar Controller Material: ABS Rated current: 40A System voltage: Automatic identification of 12V and 24V Solar input voltage: Less than 55V Power rating: 12V 600W; 24V 1200W USB output: 5V 1A Operating temperature: 25 C to 55 C Protection class: IP30 Package contents 1 x Solar Controller 1 x User Manual Typical applications Offgrid home power systems: Regulate PV panels and maintain battery charge for household lighting and small appliances. Remote lighting and signage: Provide reliable automatic control and battery protection for LED lighting in cabins, sheds, or roadside signs. Mobile and recreational setups: Manage solar charge for 12V or 24V battery banks in RVs, boats, or camper conversions where compact, dependable control is needed. Important safety and installation notes 1. When working on a 24V system, terminal voltages can exceed safe touch levels. Use insulated tools and ensure hands are dry when making connections. 2. Reverse battery connection will not damage the controller, but it may produce negative voltage at the load output which can damage connected devices. Verify polarity before connecting loads. 3. In a 24V system, reversing one battery or solar panel connection can damage the controller. Confirm correct wiring before powering the system. 4. Batteries store significant energy; avoid any battery short circuits. It is recommended to install a suitable fuse or circuit breaker in series with the battery. 5. Batteries can emit flammable gases during charge and discharge. Keep sparks, open flames, and smoking materials away from the battery area and ensure adequate ventilation. This Solar Controller combines balanced PWM charging, versatile load control, and comprehensive protections in a compact ABS enclosure, making it suitable for a wide range of 12V and 24V solar applications.