Style: 12V 24V 50A Overview This solar charge controller manages charging and discharging in offgrid 12 V or 24 V systems and protects the battery through an intelligent, optimized charging process. It improves battery life and system performance with MPPT charging, temperature compensation, and multiple builtin protections. Key benefits Automatic 12 V and 24 V system identification for easy installation and operation. MPPT charging for efficient energy harvest from solar panels. Comprehensive battery protection against overcharge, overdischarge, short circuit, overload, and reverse connection. Temperature compensation automatically adjusts charge and discharge voltages to extend battery life. Userfriendly LCD and twobutton interface for clear status display and simple configuration. Data logging of run time, error occurrences, and full charge counts for system monitoring and troubleshooting. Builtin load control and configurable timer for applications such as street lighting. Main features Automatic system voltage detection: 12 V and 24 V auto recognition. LCD display with doublebutton humanmachine interface for setup and status information. Full set of adjustable technical parameters for system tuning. Selectable load control modes and timer reset function for night lighting. Discharge capacity control to limit load consumption when needed. Working storage function: records total run time, error timer records, and full charge counts. Protections: overvoltage, short circuit, overload, overcharge, overdischarge, and roundtheclock reverse connection protection. Accurate temperature compensation: 3 mV per cell per degree C (systemlevel compensation applied). Circuit topology: positive poles of solar panels, battery, and controller connect together, with negative MOSFET implementation. Uses quality components to improve conversion efficiency. Specifications Available current ratings: 30 A, 50 A, 70 A. Rated voltage: 12 V / 24 V auto. Charging type: MPPT. USB output: 2.4 A x 2. Maximum PV input power: 12 V: 30 A 390 W; 50 A 650 W; 70 A 910 W. 24 V: 30 A 390 W; 50 A 650 W; 70 A 910 W. Overcharge voltage: 13.7 V for 12 V systems, 27.4 V for 24 V systems (systemlevel setting). Overdischarge cutoff: 10.5 to 11 V for 12 V systems, corresponding double values for 24 V systems. Recovery discharge voltage: 12.6 V. Normal operating voltage range: typically 10.7 V to 13.7 V; these thresholds are useradjustable. Temperature compensation: 3 mV per cell per degree C. Noload current draw: less than 45 mA. Loop voltage drop: less than 200 mV. Physical size: 30 A: 17.5 x 14 x 4 cm (6.9 x 5.5 x 1.6 in). 50 A: 21 x 19.2 x 5.5 cm (8.3 x 7.6 x 2.2 in). 70 A: 22.8 x 20 x 5.5 cm (9 x 7.9 x 2.2 in). Package weight range: 480 g to 1284 g depending on model. Setup tips and notes The controller will automatically identify system voltage on power up. If battery voltage falls below the discharge cutoff, the controller will stop output; the controller will resume output once the solar panel recharges the battery to the recovery voltage (12.6 V for 12 V systems). The normal working voltage range is adjustable; if adjustments are needed, follow the controller interface steps: 1. Press and hold the MCU control button for about 3 to 4 seconds to enter the management interface. 2. Use the add button to set the desired voltage, for example 13.7 V for overcharge threshold. 3. Press the MCU button again to save settings; wait until the display stops flickering to confirm the save. The controller supports negative MOSFET switching and requires the positive poles of panels, battery, and controller to be connected together as specified. Applications and use scenarios Offgrid home solar systems: manage battery charging and load control for small household appliances and lighting. Vehicle and recreational use: power accessories in automobiles and motorcycles while protecting the vehicle battery. Street lighting or remote lighting control: use the selectable load mode and programmable timer to switch lights at night and conserve battery capacity. Compatibility Works with 12 V and 24 V battery systems and solar panels sized within the specified PV input limits. Suitable for automotive and motorcycle setups and for small household appliances and lighting systems. This controller provides reliable battery protection, simple user controls, and flexible configuration for a range of offgrid solar applications.