Fangrui Product Details 1. Foxsur 20a Solar Charge Controller 12v 24v Automatic Identification Controller 2. The Controller Is A 12v 24v Automatic Identification Intelligent Controller. The Maximum Working Current Is 20a. When Using A 12v Battery, The Solar Panel Can Be A Solar Photovoltaic Panel With A No-load Voltage Of 15-25v And A Power Within 240w. Solar Photovoltaic Panels With No-load Voltage Between 30-50v And Power Within 480w. 3. This Controller Has Lcd Indicator For Clearer Use. 4. The 12v 24 Automatic Identification System Is Used, And The Charging Current Is 20a. 5. Using Unique Terminal Blocks, The Wiring Is More Stable, Larger And Stronger. 6. Full-featured Electronic Protection, Overload, Short Circuit, Reverse Connection Full Protection, Do Not Burn The Product And Electronic Components. 7. Pwm Main Charging Circuit, Prevent Over-charge, Over-discharge, Do Everything Possible To Protect The Your Battery. 8. Stylish Shell, Beautiful And Practical, Can Be Used In Complex And Harsh Environments. 9. With Usb Function, You Can Charge Your Mobile Phone. 10. Parameters: 11. System Voltage: 1224 Adaptive 12. Rated Charging Current: 20a 13. Rated Discharge Current: 20a 14. Maximum Photovoltaic Voltage: <41v 15. Floating Charge Voltage: 13.7v (default, Adjustable) 16. Discharge Cut-off Voltage: 10.7v (default Value, Adjustable) 17. Discharge Recovery Voltage: 12.6v (default Value, Adjustable) 18. Standby Current: <10ma 19. Usb Output: 5v 2a Max