Product Description： brand new and high quality Made of high-quality materials, durable Small solar system controller A 12V, 24V automatic identification A dual MOS anti-backflow circuit, ultra-low heat generation A built-in over-current/short-circuit protection, reverse connection protection All are automatically restored without damaging the controller. Complete 3-stage PWM charging management Suitable for solar power generation systems, smart homes, solar chargers, solar ventilation systems, solar light boxes, solar billboards, solar warning lights, etc. Multiple protection measures, built-in over-current, short-circuit protection, reverse connection protection, open-circuit protection, all of which are automatically restored without damaging the controller Light control time and space, this controller has light control time control, can control the discharge through sunlight and time Three-stage PWM regulation charging adopts direct charge, boost charge, and floating charge three-stage PWM regulation charging method. Using the controller is the first efficient and fast intelligent charging and effectively prolongs the service life of the battery Menu key: Used to switch the parameter display interface, or long press for 5s to enter or exit the parameter setting. Scroll up: In the parameter setting interface, lightly press once to increase the parameter by level. Scroll down: In the parameter setting interface, tap once to decrease the parameter by level. Browse interface: Short press the menu key to cycle through the interfaces and parameters. Setting parameters: In interface 2-5, long press the up key for 5 seconds to restore the default value, long press the menu key for 3 seconds to enter the manual setting, at this time the number will flash, press the up and down keys to adjust the parameter value, and 3s after completion, exit the setting. Product specifications: System voltage: 12V/24V automatic Rated charging current: 10A 20A 30A 40A 50A 60A Rated discharge current: 10A -60A The highest photovoltaic voltage 10A-30A: 12V system