Features: This solar charge controller is ideal for household power generation systems. Constructed from high-quality ABS material, it is resistant to aging, safe, and durable. Designed with four mounting holes for easy installation. Automatically disconnects the load when battery voltage is low. Provides protection against overcharging, short circuits, overloads, and lightning. Automatically adjusts charging voltage based on ambient temperature changes. Specifications: Condition: Material: ABS Color: Black Rated Voltage: 12V / 24V (automatic switch) Maximum Load Current: 30A Input Voltage Range: 12–20V / 24–40V Charging Circuit Drop (1m): <250mV Discharge Circuit Drop (1m): <50mV Fully Charged Cut-off: 13.7–14.4V / 27.4–28.8V (no load condition) Low Voltage Cut-off: 10.5–11V / 21–22V Temperature Compensation: -3mV/°C per battery No Load Loss: 10mV (10A / 15A); 20mV (20A / 30A) Efficiency: 95%–97% Maximum Wire Area: 2.5mm² (10A / 15A); 4mm² (20A); 6mm² (30A) Ambient Temperature: -25°C to 55°C Dimensions (L x W x H): approx. 13.2 x 7 x 3cm / 5.20 x 2.76 x 1.18in Weight: approx. 135g Package Included: 1 x Solar Charge Controller Wiring Instructions: 1. Connect the storage battery to the 3rd and 4th terminals (from the left). The load indicator will flash once and remain lit after 15 seconds, indicating correct connection. Incorrect wiring may damage the controller. 2. Connect the solar panel to the 1st and 2nd terminals (from the left). 3. Connect the load to the 5th and 6th terminals (from the left). Indicator Light Functions: 1. Charge Indicator: - On: Charging at full power - Flashing: Float charging - Off: Charging complete 2. Load Indicator: - On: Output active, load operating normally - Off: No output, load not working Notes: 1. Before wiring, verify the rated voltage of the solar panel, battery, and load. Ensure all are 12V or all are 24V. 2. The rated current of the solar panel and load must not exceed the controller’s maximum current (30A). 3. Do not connect the solar panel directly to the load. 4. Avoid using artificial light to charge the solar panel, as it does not provide sufficient intensity.