Feature:1. The solar controller has the functions of short circuit protection, open circuit protection, reverse protection, overload protection, etc.2. 3?stage PWM charging management, effectively improving system efficiency and extending battery life.3. Once the battery voltage drops below 8V, the solar controller will automatically shut down to protect the battery.4. Equipped with an LCD display, which can clearly display status and data, and easily switch modes and parameter settings.5. The controller should be connected to the battery first, then to the solar panel, and finally to the load.How to Use:1. Connect the positive and negative poles of the battery to the controller as shown in the figure, and the controller will automatically detect the battery voltage.2. Connect the positive and negative poles of the load to the controller as shown in the figure.3. Connect the solar panel to the controller as shown in the figure.Specification:Item Type: Smart ControllerMaterial: ABSModel: GLL1210Uses: Suitable for home, industry, commerce, etc.Rated Voltage: 12/24VMaximum Photovoltaic Voltage: 50V10A Solar Panel Power: 130W (12V) 260W (24V)20A Solar Panel Power: 260W (12V) 520W (24V)30A Solar Panel Power: 390W (12V) 780W (24V)USB Output: 2 USB outputs, 5V/2.5A (maximum)Package List:1 x Smart Controller1 x User ManualNote:The controller is only suitable for open type/AGM/gel type acid batteries, not suitable for metal hydride, lithium, lithium ion or other batteries.