About

The ISEA, together with enspired GmbH, is developing an index for the German battery market that aims to transparently represent the revenue potential for large-scale storage systems in terms of grid services. It is currently under development and will be further refined in the coming months (as of 04/2025).

The index was primarily developed by Jonas Brucksch and Jonas van Ouwerkerk. It takes into account the spot markets (Day-Ahead Auction, Intraday Auction, Intraday Continuous Trading) as well as the balancing markets (FCR, aFRR). The index aims to enhance market transparency and provide a basis for investors, project developers, and traders to better assess potential revenues. The index is intended to create comparability but does not reflect the actual maximum achievable revenues. Instead, it is designed to be simple enough to be understandable and calculable, for example, in Excel.