This controller with automatic lighting control function System Voltage: 12V/24V AUTO Maximum Panel current: 10A/15A/20A/30A Over-discharge cutoff voltage: 11.1 V Operating Temperature: -35℃ to +55℃ Control mode: PWM charge mode Weight: about 200g LED Display Overloading protection Short circuit protection Reverse current protection The temperture compensation Prevent the battery from over-charging/ over-discharging Detects day and night using the PV array, timer setting Fully automatic operation & Electronic protections Package Included: 1 x Solar Charge Controller 1 x User Manual