Emergency power system
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"Emergency power" redirects here. For the powers exercisable by heads of state in an emergency, see Reserve power.
An emergency power system is an independent source of electrical power that supports important electrical systems on loss of normal power supply. A standby power system may include a standby generator, batteries and other apparatus. Emergency power systems are installed to protect life and property from the consequences of loss of primary electric power supply. It is a type of continual power system.
They find uses in a wide variety of settings from homes to hospitals, scientific laboratories, data centers,[1] telecommunication[2] equipment and ships. Emergency power systems can rely on generators, deep-cycle batteries, flywheel energy storage[3] or fuel cells.[4][5]