Description:    10A\/20A\/30A 12\/24V Auto PWM Solar Charge Controller Settable Solar Panel Charger Controller GEL Battery Charger Flooded Sealed Batteries  The controller is for off-grid solar system、especially in solar lighting system and protects the battery from being over charged by the solar module and over dischargerged by the loads. The charging process has been optimized for long battery life and improved system performance.The comrehensive self-diagnostics and electronic protection functions can prevent damaged from installation mistakes or system faults.   Features:   12\/24V automatic recognition. High efficient Series PWM charging、 increase the battery lifetime and improve the solar system performance.  Use MOSFET as electronic switch、 without any mechanical switch. Widely used、 automatically recognize day\/night.  Digital LED menu、 only one key solve all setting simply.    Intelligent timer function with 1-15 hours option. Unique dual timer function、 enhance the flexibility of street light system.  Gel、 Sealed and Flooded battery type option.  Adopt temperature compensation、 correct the charging and discharging parameters automatically  and improve the battery lifetime.  Electronic protection: Overheating、 over charging、 over discharging、  overload、 and short circuit.  Reverse protection: any combination of solar module and battery.           Specification:                Description         Parameter               Nominal System Voltage         12\/24VDC Auto work               Battery Voltage Range         6-36V               Rated Battery Current         10A\/20A\/30A optional~               Charge Circuit Voltage Drop         ≤0.26V               Discharge Circuit Voltage Drop         ≤0.15V               Self-consumption         ≤6mA        Threshold Voltage Parameters               Description         Parameter               NTTV (Night Time Threshold Voltage)         5V; x2\/24V               DTTV (Day Time Threshold Voltage)         6V; x2\/24V        Temperature Compensation Coefficient               Description         Parameter               Temperature Compensation (TEMPCO)*         -25mV\/ C\/12V(25 C ref)              Battery Voltage Parameters (temperature at 25 C)               Charging setting               Sealed               Flooded               Gel                     Over voltage disconnect               15.5V;x2\/24V                     Charging limit voltage               15.0V;x2\/24V                     Equalize charging voltage               14.6V;×2\/24V               14.8V;×2\/24V               14.4V;×2\/24V                     Boost charging voltage               14.4V;×2\/24V               14.6V;×2\/24V               14.2V;×2\/24V