Model K1688, Style 10A Solar Charge Controller Compact, reliable solar charge controller designed for small offgrid systems and auxiliary power setups. The K1688 10A controller combines clear monitoring, adjustable charging parameters, and multiple safety protections to keep batteries healthy and devices powered. Key benefits Simple automatic system detection: autorecognizes 12V or 24V systems to reduce setup errors. Protects battery life: adjustable charging and cutoff thresholds help prevent overcharge and deep discharge. Easy monitoring: large LCD shows accumulated power generation, temperature, and operating status at a glance. Fast device charging: dual USB outputs support up to 2.5A each for phone and accessory charging. Safe operation: multiple builtin protections reduce risk of damage from wiring faults and abnormal conditions. Features System voltage: automatic adaptation to 12V or 24V. Maximum photovoltaic open circuit voltage: 50V. USB outputs: 2 USB ports, 5V, 2.5A maximum each for charging phones and small electronics. Charging settings (default values, adjustable): boost charging voltage 14.4V; floating voltage 13.7V. Discharge protection settings (default values, adjustable): cutoff voltage 10.7V; recovery voltage 12.6V. Charging recovery voltage: 13V. Standby current: low standby consumption for extended battery life. Operating temperature: 35 to +60 C. Construction: durable ABS housing with industrialgrade main control chip and antibackflow circuit for low heat generation and efficient operation. Builtin protections: overcurrent, short circuit, open circuit, and reverse connection protection. Performance (10A variant) Maximum PV input current: 10A. Recommended maximum PV input power: 130W when using a 12V battery system; 260W when using a 24V battery system. Compatibility Intended for use with lead acid batteries including flooded, sealed, and gel types. Designed to work only with photovoltaic panels as the solar power source. Practical applications Small offgrid lighting systems for cabins, sheds, and workshops where simple automatic control and monitoring are required. Mobile power for vehicles such as RVs and boats to maintain battery charge and provide USB charging for phones and accessories. Garden or remote lighting and sensor systems that need reliable solar charging and automatic load control. Package contents 1 x Solar Controller (Model K1688, Style 10A) 1 x User Manual Installation and safe use recommendations For firsttime installation, ensure the battery has sufficient voltage so the controller can correctly detect 12V or 24V systems. Mount the controller as close to the battery as possible to minimize voltage drop from long cable runs and ensure accurate voltage sensing. Use only with compatible lead acid battery types listed above. This controller is designed to work with photovoltaic panels as the power source. This description reflects the K1688 10A controller specifications and functions for straightforward selection and safe operation.