What is the power supply of Dahua Hawkeye panorama camera?

The power supply of Dahua Hawkeye panorama camera is 12 volts. According to the relevant data, the power consumption of the monitoring camera is very small, second only to the power of 5W, that is, when the infrared light is turned on at night, it also involves the switching efficiency of the power supply, and the actual power consumption is larger than that calculated according to the camera power. General monitor head output 12v 1.5A output power = vxa =12vx1.5a =18w. Input power: calculated as 80% of DC power conversion efficiency, input power = 18W0.8=22.5W, 24-hour electricity consumption = 22.5WX24 hours = 540Wh = 0.54kWh ..