Glossary of energy terms

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Uninterruptible power supply (UPS)

A UPS ensures the safety and operation of critical computer systems, IT and other electronic equipment during power surges and power outages by providing immediate backup power from batteries when the power flow drops to insufficient voltage or stops.
SOURCE: https://www.elektroprumysl.cz

Unregulated energy consumer

All entities with an annual consumption of more than 30 MWh of electricity or 100 MWh of gas which do not fall into the category of regulated energy consumers and purchase electricity from a supplier according to a contract on the joint supply of electricity at prices not subject to price regulation.