Stand-Alone Battery Storage

A stand-alone battery storage system is a large battery storage system that is operated independently of an energy generation plant. In contrast to storage systems that are coupled directly to solar or wind farms, it is connected exclusively to the electricity grid.

Classification as a grid-scale storage system

Stand-alone storage systems are generally counted among the grid-scale battery storage systems. They are operated on a megawatt scale and take on central tasks in the electricity system.

Typical tasks in the electricity grid

Because stand-alone storage systems operate independently of a generation source, they can be deployed with particular flexibility:

• provision of primary control reserve
• provision of secondary control reserve
• balancing out grid bottlenecks
• stabilisation of the grid frequency

Significance for the energy transition

As the share of renewable energies increases, so does the need for flexible storage systems. Stand-alone battery storage systems can store electricity independently of generation locations and feed it back into the grid as needed. In this way, they make an important contribution to security of supply and to the stability of an increasingly decentralised energy system.

Frequently Asked Questions (FAQs)

What is a stand-alone battery storage system?

A stand-alone battery storage system is a large battery storage system that is operated independently of an energy generation plant and is connected directly to the electricity grid.

How does a stand-alone storage system differ from a co-location storage system?

A stand-alone storage system is independent of generation plants, whereas co-location storage systems are combined directly with solar or wind farms.

What tasks do stand-alone battery storage systems perform?

They stabilise the electricity grid, provide control reserve and help to balance out grid bottlenecks.

Why are stand-alone storage systems important for renewable energies?

They balance out fluctuations from renewable energies and ensure that electricity can be stored flexibly and made available again when needed.

What role do stand-alone storage systems play in the energy market?

Stand-alone storage systems can participate in the control reserve market and generate additional revenue through grid-supporting services.