Definition
Battery storage (BESSBattery Energy Storage System - technology for storing electrical energy in batteries to balance production and consumption. - Battery Energy Storage System) comprises stationary systems that store electrical energy chemically and release it on demand. Battery storage can be installed at all scales - from residential batteries (Powerwall type) to industrial installations of hundreds of MWh. In the power systemThe totality of facilities, lines and systems for producing, transmitting and distributing electrical energy., battery storage is used for frequency regulation (FCR/FFR), peak shaving, trading arbitrage, and as backup during grid outages. With an increasing share of variable renewable energyEnergy from sources that renew naturally - wind, solar, hydropower and bioenergy - as opposed to fossil fuels. (solar and wind), battery storage is becoming an ever more important flexibilityAbility to change power consumption or production in response to price signals or system operator needs. resource. In the Norwegian market, battery storage is registered as metering points in ElhubNational hub for metering data and market processes in the Norwegian electricity market. with a dedicated meter type for bidirectional energy flow. The regulatory framework for battery storage is under development, and NVENorway's Directorate of Water Resources and Energy - regulates the electricity and water resources sectors. is working on licensing requirements and grid connectionThe process of connecting a new facility to the electricity grid and registering it as a metering point in Elhub. procedures.