Is the UPS power supply own?
According to the law of conservation of energy, it is impossible to no electricity.
No electricity is not possible, but generally not much
Of course fee
UPS is through the battery charge to store electricity, when the power failure and then the battery power through the inverter into the required voltage for the use of equipment.
Both the charger part and the inverter part of the efficiency is less than 100%, especially the inverter part, the efficiency is lower. Battery energy and chemical energy conversion is also a loss of energy.
However, most of the time UPS is in standby mode, good quality UPS power consumption is not much.
