District Storage Systems are used as decentralized battery storage systems in settlements, residential areas or urban quarters. They act mainly as intermediate storage for locally generated electrical energy - mostly from PV systems, but also from combined heat and power plants (CHP). From a technical point of view, they represent an alternative to home storage. In Germany, only a limited number of district storage systems have been currently installed, but regulatory initiatives at the EU level are expected to increase the use of these storage solutions in the future.
Housed in buildings or in containers, district storage is either connected to the public grid or operated in a self-managed grid infrastructure within a shared-energy community. District storage helps increase self-consumption of renewable energy in a local service area, saving space and resources compared to the use of individual home storage. Furthermore, compared to individual storage solutions, district storage can be more easily used for multi-use purposes. These include business models such as providing grid services, local peak shaving, arbitrage, and flexible charging structures for e-vehicles.
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