The 2,500h rule is a tariff threshold in the German system for calculating grid fees under the Electricity Grid Fee Ordinance (StromNEV). It differentiates grid fees for demand-metered electricity consumers according to their utilisation period – i.e. the ratio between annual consumption and annual peak load.
The threshold of 2,500 utilisation hours per year divides consumers into two fundamental fee logics: below this limit, the energy-price and demand-price components are weighted differently than above it. The aim is a more cost-causation-based representation of grid usage.
It creates a tariff logic that distinguishes between highly peak-heavy and more even load profiles. For larger electricity consumers, the level of annual peak load – and therefore how many utilisation hours are reached – can be economically significant.
Utilisation hours are calculated by dividing annual electricity consumption (kWh) by maximum power (kW). They indicate how long a consumer would theoretically have had to run at their highest power output to reach their annual consumption.
The 2,500h rule serves as a tariff reference point for structuring grid fees on a cost-causation basis according to load profiles. It creates incentives for more even grid usage and the reduction of peak loads.
Below 2,500 utilisation hours, the share of the energy price is typically higher in relative terms. Above 2,500h/year, the relative share of the demand price increases, while the energy price decreases accordingly.
A battery storage system can absorb load peaks (peak shaving) and smooth out grid consumption. This reduces the peak load and can increase the utilisation hours – which, depending on the tariff structure, can have a positive impact on grid fees.
No. The 2,500h rule is a general threshold in the standard grid fee logic. Individual grid fees according to § 19 StromNEV apply to very high utilisation hours and consumption volumes and are a separate special regulation.
According to the draft determination by the Federal Network Agency dated August 6, 2026, in the AgNes (General Grid Fee Systematics Electricity) proceedings, the current 2,500-hour limit is to be abolished as of January 2029. The final determination is expected to be adopted later in 2026 and will apply from January 1, 2029. According to the draft determination, the current demand price for commercial and industrial consumers is expected to be replaced by a booked capacity model. Within the booked capacity, a regular energy price AP1 applies. For electricity volumes above the booked capacity, a higher energy price AP2 is incurred.
