Glossary of energy terms

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Backup inverter

A backup inverter is an electronic device that converts direct current (DC) from batteries into alternating current (AC), which is used to power electrical equipment during power outages. This inverter is a key component of uninterruptible power supply (UPS) systems and backup power systems.

Backup inverters are essential for systems where continuous operation is critical, such as servers, data centers, medical facilities, and other critical infrastructures.

Backup power source

This ensures a supply of electricity in the event of any failure of the main source of electricity. Backup sources can be UPS battery systems, characterized by a quick start-up but only lasting a limited time. Another is a local power plant or a diesel unit, using a synchronous generator and diesel combustion engine, which can run for an unlimited time, but the onset of electricity production can be calculated in minutes.

Balance group

A group of delivery points and production points for which one common billing entity, for example, an electricity supplier, has taken over the responsibility for deviations.

Battery management system (BMS)

A device that monitors and controls connected batteries. Its task is to ensure optimal charging and discharging, protecting batteries from over or undercharging, increasing their lifespan. A BMS also serves to monitor battery temperature, preventing overheating or undercooling.

Battery storage

Battery storage, often referred to as large-capacity battery storage, accumulator storage or battery energy storage system (BESS), is device used to store electrical energy produced anywhere including from renewable sources such as solar panels. Stored energy can then be used when renewable sources are not available to produce electricity. In the case of solar energy, in the morning or evening hours for example.

An advanced type of battery storage is smart battery storage. Such storage is equipped with advanced technology to manage and optimize its performance and efficiency. These systems include intelligent software platforms to manage the charging and discharging of batteries based on current energy demand, energy prices or the state of the power grid.