Item Type: Solar Charge Controller Material: ABS Model: K1688 Color: Orange System Voltage: 12V/24V automatic adaptation Maximum Photovoltaic Voltage: 50V USB Output: 2 x USB outputs, 5V/2.5A (maximum) Boost Charging Voltage: 14.4V Floating Voltage: 13.7V (default value, adjustable) Discharge Cut Off Voltage: 10.7V (default value, adjustable) Discharge Recovery Voltage: 12.6V (default value, adjustable) Charging Recovery Voltage: 13V Standby Current: <10mA Working Temperature: -35°C to +60°C Rated Current: 10A, 20A, 30A Maximum Photovoltaic Input Power: - 130W at 12V system voltage - 260W at 24V system voltage - 260W at 12V system voltage - 520W at 24V system voltage - 390W at 12V system voltage - 780W at 24V system voltage Features: 1. LCD DISPLAY: Large screen LCD displays charging and discharging current, cumulative power generation, discharge power, and temperature. 2. LIGHT CONTROL AND DELAY CONTROL: Supports light control and delay control with adjustable charge and discharge parameters. Includes power-off memory function. 3. DUAL USB OUTPUT: Industrial-grade main control chip provides dual USB output, maximum output current up to 2.5A, compatible with iOS devices. 4. THREE-STAGE CHARGING MANAGEMENT: Complete three-stage charging process with reverse current protection and low heat generation. 5. PROTECTION FUNCTIONS: Built-in protection against overcurrent, short circuit, open circuit, and reverse connection. Self-recovering protections help prevent controller damage. Installation and Usage Notes: 1. The controller automatically identifies 12V or 24V battery systems. Ensure the battery has sufficient voltage during initial installation for correct system recognition. 2. Install the controller as close to the battery as possible to minimize voltage drop from long wiring and ensure accurate voltage detection. 3. This controller is designed for use with lead-acid batteries, including flooded, sealed, and gel types. 4. The controller must be charged only by photovoltaic panels. Do not connect DC power supplies or other non-solar power sources. 5. The controller may generate heat during operation. Install on a flat, well-ventilated surface to ensure proper heat dissipation. Package Includes: 1 x Solar Charge Controller 1 x English User Manual