Item Type: Solar Panel Controller Material: ABS, Aluminum Plate Product Size: Approx. 13 x 10 x 3cm / 5.1 x 3.9 x 1.2in Sec10(10a): Maximum 175w Solar Panel Sec20(20a): Maximum with 350w Solar Panel Battery Type: Lead Acid, Ternary Lithium, Lithium Iron Phosphate Voltage: 12V/24V Automatically Applicable Charging Technology: PWM Use: Solar Controller Weight: Approx. 224g/7.9oz Package List 1 x Solar Panel Controller 1 x User Manual 1Scope of Application: Solar panel controller is mainly applied to small off grid solar power system, such as home solar power system, ships, etc 2Self Setting: According to the actual situation, set the solar panel controller strong charging voltage and battery low voltage protection voltage 3PWM Charging: Solar charge controller adopts 3 stage PWM charging mode, strong charging, balanced charging and floating charging 4Intelligent Microcontroller: Solar charge controller adopts intelligent microcontroller design, all work processes are controlled by software, which can achieve reliability 5ABS and Aluminum Plate: Solar panel charge controller is made of ABS and aluminum plate material, which is wearable and durable, and has a long service life