An assembly of static devices, commonly known as an uninterruptible power supply (UPS), that is connected to the line power system of a hospital or institution to provide an independent continuous supply of electrical power, without delay, whilst the backup generators start. It will supply selected areas of high importance [i.e., operating theatres, the intensive care unit (ICU), the information technology (IT) department] for a limited period of time during the failure of the mains electricity (AC-power) supply. It will consist of a large set of dedicated batteries, battery chargers, and electronics that monitor and switch over to this system when a failure in the line-power has occurred.