Difference in production of elevator energy saving devices by different manufacturers

The elevator will consume a large amount of electricity in each month of operation, because unlike other electronic products can be used for a period of time to stop, as one of the necessary number of office buildings or residential products, once in order to save electricity and stop it, will give users some unnecessary trouble.
As one of the biggest electricity consuming products, compared with the air conditioner, it has a power consumption of tens of times, because the cost of the elevator starts every time is very high, and only enough electricity can lift the elevator up or down. The purchase of the elevator energy saving device is required for each manufacturer and enterprise, have the energy-saving products, although not reduce elevator usage time, but no one in the case will help lift automatically enter the stop state, only when a passenger presses the button in the special floor, the elevator will be back to work.
If you do not buy the elevator energy saving device, so in the middle of the night when no one is using the elevator, he will still keep on running, lift every night will consume a lot of money on electricity, one year is tens of thousands more even, buy energy-saving device for use after two or three years can make cost savings all earned, but there will be extra profit. An energy-saving device can sometimes support several elevators to work at the same time. So businesses don't have to worry about the cost of buying a huge amount of energy.