Features 1、Advanced MPPT Technology: The MPPT solar controller employs advanced maximum power point tracking technology with an impressive tracking efficiency of around 99%. It also has a DC to DC conversion efficiency of about 93%, maximizing the energy harvesting capability. 2、Bluetooth Connectivity: The controller features a built in Bluetooth capability, allowing real time monitoring and adjustment of controller parameters through a mobile app. It also offers adjustable output modes, including 24 hour output, light only output, light and timed output. 3、Aluminium Alloy Construction: The entire solar charge controller is made of an integrated aluminum alloy material, sealed with thermal conductive gel in multiple heat dissipation slots, making it completely water resistant and safe. 4、12V to 24V Compatibility: The controller is universally compatible with 12V to 24V systems. By default, it auto adapts to 12V to 24V systems but can also be locked into a 12V or 24V system. This enhances system stability and reduces erroneous operations. It can be custom set for battery charging and discharging, with adjustable discharge voltage modes. 5、Smart 3 Stage PWM Fast Charging: The controller utilizes a smart three stage PWM fast charging technology that automatically identifies the battery, ensuring batteries are never overcharged. It reduces charging interference, making it more suited for small battery systems. Specifications Item Type: MPPT Solar Charge Controller Material: Integrated aluminum alloy shell Battery Type: 12 to 24V Sealed Battery Universal Battery Voltage: 12 to 24V Battery Charging Current: ≤10A Maximum Solar Input Power: 12V 150W; 24V 300W Maximum DC Output Current: 10A No Battery Mode: Support 12V Battery Activation Function: Yes Output Mode: Normally Open (24 hour Power Supply) Connection Method: Infrared + Bluetooth Size: Approx. 92x104x27.8mm / 3.62x4.09x1.09in Hole Distance: Approx. 94-45mm/3.7-1.8in; R4 Normally Open Output: Under normal battery voltage conditions, the mode discharges both day and night Pure Light Control: When the controller detects that the solar panel is at the night turn on voltage point, the load is turned on until the solar panel voltage is higher than the light control turn off voltage again, and the load is turned off (automatically turned off during the day, automatically turned on at night, automatically adjusted in winter and summer, the sooner it gets dark, the sooner it closes, and it gets dark late and it opens late) Light Control+Timing: When the controller detects that the solar panel is at the night voltage point, it directly turns on the load and works continuously for a fixed number of hours before turning off. Weight: Approx. 465.00g / 16.4oz Package List 1 x Controller 1 x User Manual