Features: (1)Solar charge controller manage the working of solar panel and battery Automatically in solar system. (2)Dual USB output, the maximum current of 20A, solar panel charge controller support moblie phone charging. (3)Build-in short-circuit protection, open-circuit protection, reverse protection, over-load protection. (4)Solar controller has dual MOSFET Reverse current, protection from lightning strike. (5)Prolong the battery life cycle and keep the load work well. (6)Solar charge controller is easy to set up and operate. (7)Charge controllers for solar panels is suitable for solar energy system. Details： Brand Name: Saooer Model Number: 20A Controller type: PWM Application: Solar System Controller Work Time (h): 24 Max PV Voltage: 12V/24V AUTO Product name: SOLAR CONTROLLER Display: LCD Screen Battery Voltage: 12VDC-48VDC DC voltage: 12V/24V Common Q&A Q: How to install it? A: Solar Charger Controller Connection steps: 1.Connect the battery to the charge regulator. 2.Connect the solar panel to the solar charge controller. 3.Connect the load to the charge controller regulator. Q: What battery type is this controller supported? A: The regulator is only suitable for lead acid batteries:OPEN, AGM, GEL. B-01=LEAD-ACID, 12V; B-02=LITHIUM ION 3s, 3*3.7V=11.1V; B03=LIFePO4 4s, 4*3.2V=12.8V. Note: Connect battery first, then connect load and solar panel. It will help the controller,recognize the battery voltage. When you disconnect the controller, please remove the solar panel,and load, the remove the battery. Package List: 1 x Solar Charge Controller 1 x English User Manual