Specification: Material: ABS + ROHS. Model: YCX-003. System voltage: 12/24 V, adaptive. Solar panel voltage: 12V, 18V, 24V, 36V Floating charging voltage: 13.7 V (standard, adjustable). Discharge voltage: 10.7 V (standard, adjustable) Discharge recovery voltage: 12.6V (standard, adjustable) Standby current: < 10 mA. USB Output: 5V/2A Max Rated voltage: 12/24 V. Optional rated current: 40A, 50A, 60A, 100A Maximum PV voltage: 50 V. Maximum PV input power: 40 A: 520 W (12 V)/1040 W (24 V) 50A: 650W (12V)/1300W (24V) 60A: 780W (12V)/1560W (24V) 100 A: 1300 W (12 V)/2600 W (24 V). Size: approx. 170 x 92 x 45 mm / 6.7 x 3.6 x 1.8 inches. Approximate weight 318 g. Function: 1. Always keep the battery at filling voltage. 2. Prevent the battery from overcharging. 3. Prevent deep discharge of the battery. 4. Prevent the battery from being damaged during in solar cells is recharged nights. 5. Reverse polarity protection for battery. 6. Reverse polarity protection for solar panels. 7. When the battery voltage is low, the controller automatically disconnects the load from the system. When the battery voltage is back to normal, the load will work again. 8. Thunder protection. 9. According to the battery voltage level, the controller can automatically adjust the charging voltage, charging voltage and charge recovery voltage. (The parameter is default under 25℃ conditions, locked by the CPU procedure, cannot be adjusted.) 10. The controller automatically compensates the temperature of the charging voltage according to the changes in ambient temperature. Package list: 1 x battery charge controller for solar panels. 1 x user manual (English language not guaranteed)