Technical terms in the energy storage industry

What is a battery energy storage system?

BESS - Battery Energy Storage System Rechargeable battery that stores power provided from various energy sources for later use. The system can be discharged as needed for grid support and backup power. Grid/power grid/electricity grid Network of power lines for the transmission and distribution of energy over a geographical area. Capacity retention

What is an energy storage system (ESS)?

Energy Storage System (ESS) As defined by 2020 NEC 706.2, an ESS is “one or more components assembled together capable of storing energy and providing electrical energy into the premises wiring system or an electric power production and distribution network.” These systems can be mechanical or chemical in nature.

What is electrical energy storage (EES)?

Electrical Energy Storage, EES, is one of the key technologies in the areas covered by the IEC. EES techniques have shown unique capabilities in coping with some critical characteristics of electricity, for example hourly variations in demand and price.

What is a thermal storage system?

Thermal (energy) storage systems store available heat by different means in an insulated repository for later use in different industrial and residential applications, such as space heating or cooling, hot water production or electricity generation.

How is thermal energy stored?

Thermal energy is stored solely through a change of temperature of the storage medium. The capacity of a storage system is defi ned by the specifi c heat capacity and the mass of the medium used. Latent heat storage is accomplished by using phase change materials (PCMs) as storage media.

Why are thermal storage systems important?

Thermal storage systems are deployed to overcome the mismatch between demand and supply of thermal energy and thus they are important for the integration of renewable energy sources.