Dynamic Grid Fees for Batteries in the Distribution Grid

A multi-client study

Johanna Bronisch, Anselm Eicke

2026

Germany's regulator plans dynamic grid fees for storage from 2030. For enspired, E.ON, EWE NETZ, and green flexibility, we developed a grid fee that translates congestion at HV/MV substations into price signals and evaluated it at sites in the EWE NETZ, Bayernwerk, and E.DIS grids. Even in the ideal case, with perfect foresight and a continuous price signal, the grid fee raises the system benefit of the batteries by only 0 to 8 €/kW/a, equivalent to less than 4 %. If the grid fee is set based on forecasts, it does more harm than good at all sites. A simplified 3-step grid fee can also do more harm than good even under perfect foresight, because it does not distinguish between expensive and cheap redispatch. We therefore do not recommend dynamic grid fees at this grid level. This report was originally published in German.