PWM Solar Charge Controller Model GMD Overview A compact PWM solar charge and discharge controller with an LCD display and flexible parameter adjustment. Designed for reliable leadacid battery management, intelligent PWM charging, and temperature compensated charging via a supplied temperature probe. Key benefits Simple operation and clear status display using the builtin LCD. Automatic detection of 12V or 24V battery systems for flexible installation. Intelligent PWM charging protects battery life and adapts charging to conditions. Builtin temperature sensor enables temperature compensated charging to improve battery performance. Robust protection suite reduces risk from wiring faults and system overload. Features Model: GMD Type: PWM Solar Charge Controller Input voltage: Automatic 12V or 24V battery system detection Charging current options: 40A, 50A, 60A USB output: 5V charging port for small devices Starting PV voltage range: For 12V battery: PV 13V to 25V For 24V battery: PV 30V to 50V Maximum photovoltaic input power: 40A: 12V system up to 480W, 24V system up to 960W 50A: 12V system up to 600W, 24V system up to 1200W 60A: 12V system up to 720W, 24V system up to 1440W Compatible battery type: Leadacid batteries Materials: Plastic housing with aluminum alloy heat dissipation Protections: Overvoltage protection, short circuit protection, overload protection, over temperature protection Packing list: Solar controller x1, temperature probe x1, user manual x1 Why you need it Keeps leadacid batteries properly charged using PWM control and temperature compensation. Protects the system with multiple builtin safeguards to prevent common faults. Provides a convenient USB port for charging mobile devices from the battery system. Aluminum alloy cooling improves thermal performance during sustained loads. Typical applications Offgrid solar systems for cabins and small homes where 12V or 24V leadacid batteries are used. Recreational vehicles and boats to manage battery charging from roof mounted solar panels. Backup power setups and remote equipment that require reliable battery charging and basic device charging via USB. Technical notes Choose the controller current rating that matches your panel array and battery capacity: 40A, 50A, or 60A. Ensure PV open circuit voltage stays within the stated PV voltage range for the selected battery voltage. The controller is designed for leadacid battery chemistry and uses temperature compensation via the included probe. This controller provides a practical, adjustable solution for managing solar charging in small to medium offgrid systems while offering clear status information and essential protections.