15 MW battery storage system for Pfaffenhofen

25.08.2025

Source: E & M powernews

A large-scale storage system is being built at the Reisgang substation to provide balancing energy and relieve the grid in the Pfaffenhofen an der Ilm region.

Bayernwerk Natur GmbH has commissioned Intilion AG to supply a large-scale lithium-ion storage system for the new grid storage site in Ilmmünster, Upper Bavaria. The storage system with a capacity of 30,000 kWh and an output of 15 MW is being built at the Reisgang substation and is intended to help stabilize the frequency and improve the use of regionally generated PV electricity. Commissioning is planned for the end of this year.

The storage system is based on LFP technology. This uses lithium iron phosphate as the cathode material and is to be implemented as a modular container solution. In addition to the battery containers, the delivery includes inverter and transformer units as well as Intilion's own control technology. This consists of the application unit for central control and grid regulation as well as the control unit for networking the components, inverter control and integration of fire protection and air conditioning systems.

The project aims to provide primary control power and to temporarily store midday feed-in peaks from photovoltaic systems locally. The cooperation between Bayernwerk Natur and Intilion builds on several previous storage projects. Both companies see the construction as a contribution to security of supply and the implementation of the energy transition in Bavaria.

Author: Katia Meyer-Tien