In the event of a power failure, the building's emergency generator will be automatically activated within 20 seconds to provide emergency power to some of the public facilities that are critical to personal safety, such as the fire fighting system equipment, lifts and mechanical parking spaces, etc. Residential and private electricity supply is not included in the emergency power supply.

In accordance with national standards, emergency generators should be used continuously for at least one hour under rated load to ensure that the emergency power supply in the event of a power failure can reduce the level of risk.

For example, in the event of a power failure, the lift is occupied and the emergency power supply is in operation so that people can get out of trouble; in the event of a fire failure, the fire-fighting equipment is activated to fight water and fire; in the event of a flood failure, the basement is flooded and the pumping machine needs emergency power to function, etc.

Because of the importance of emergency generators as backup power, the Fire Services Department of the Ministry of the Interior requires that emergency generating units for fire fighting purposes must be approved.

Starting from 2017, when the power generating units are completed, they should be accompanied by a test report from a third notary or an in-plant test report with the TAF certification mark.

The test report shall contain the basis of the test, the standard values and the resultant values and shall be sent to the building builder or the management of the premises for inspection.

ETC is one of the third notary institutions in Taiwan (R.O.C) accredited by the Fire Services Department of the Ministry of the Interior to provide stringent notary and certification services.

As emergency generators rarely run or even do not run, it is necessary for the user to appoint a professional manufacturer to carry out regular maintenance to maintain the emergency generators in normal operation and to ensure reliable operation in the event of power failure, so as to reduce the risk of various emergency situations and ensure the safety of our lives and property.