Compact MPPT Solar Charge Controller for 12V and 24V Systems Overview This compact solar charge controller automatically recognizes 12V and 24V battery systems and manages charging from solar panels while protecting batteries from overcharge, overdischarge, overload, and short circuit. Housed in an ABS shell and sized at about 133 x 70 x 35 mm, it is suitable for small offgrid solar installs, lighting, signage, and other low to mediumpower applications. Key features Models: available in 10A, 20A, and 30A versions to match system current requirements. Automatic battery voltage recognition: supports 12V and 24V batteries without manual switching. Solar charge input: charges from solar panels under sunlight. USB output: two USB ports, 5V, 2A max. Protection: overcharge, overdischarge, overload, and short circuit protection. Connectors: equipped with MC4 connector for convenient solar panel connection. Build and size: ABS shell, approximately 133 x 70 x 35 mm. Environmental: waterproof level IP32, operating temperature range 35 to 60 C. Electrical specifications Rated discharge current options: 10A, 20A, 30A. Battery voltage: 12V/24V automatically selectable. USB output voltage: 5V; USB output: 2 USB 5V/2A MAX. Low voltage disconnect (LVD): 10.7V / 21.4V / 42.8V. Low voltage recover (LVR): 12.6V / 25.2V / 50.4V. Charge method: charge under sunlight using solar panels. Solar panel input limits by model and battery voltage 10A model: For 12V battery: maximum solar panel input 25V 120W For 24V battery: maximum solar panel input 50V 240W 20A model: For 12V battery: maximum solar panel input 25V 240W For 24V battery: maximum solar panel input 50V 480W 30A model: For 12V battery: maximum solar panel input 25V 360W For 24V battery: maximum solar panel input 50V 720W Why choose this controller Protects battery life by managing charge and discharge thresholds and providing multiple protection functions. Simple installation and use with automatic 12V/24V recognition and MC4 connections. Compact and durable ABS housing with a wide operating temperature range for outdoor or semiprotected installations. Flexible model choices let you match controller capacity to panel and load requirements. Recommended applications and scenarios Remote cabin lighting or small offgrid power: use the 10A or 20A model to manage a 12V lighting battery and charge from rooftop or portable solar panels. Solar signage and warning lights: 10A or 20A models provide stable charging and builtin protection for solar billboards and warning lights with USB charging available for accessories. RV, boat, or smart home auxiliary power: 20A or 30A models support larger panel arrays and 24V battery systems for ventilation systems, battery charging, and small loads. Installation notes Select the controller model based on your battery voltage and the maximum solar panel wattage listed above. Use the MC4 connector for easy panel hookup and observe correct polarity when connecting battery and panels. Check the LVD and LVR values to ensure compatibility with your battery type and required disconnect and recovery settings. This controller provides a compact, protected, and easytoinstall solution for 12V and 24V small solar systems, with model options to match different power and panel configurations.