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Analysis Hub
Explore in-depth market insights across the relevant markets for German batteries
Analyse the long-term development of the aFRR capacity auction on a daily or more aggregate level by regarding rolling averages, and how it compares to previous years.
Analyse which of the EFA blocks are usually the cheapest and how much fluctuations there are across days. The changes we display are always in comparison to the daily average price.
Analyse what the aFRR capacity prices depend on. Are there dependencies to different generation types?
The Market
The automatic frequency restoration reserve is the secondary ancillary service in the German market. In aFRR, players receive a signal from their grid operator every 4 seconds on their activation. The market is split into two markets:
1. Capacity Market:
- There is a daily auction at 9am for the following day
- Each day is split into six EFA blocks, each of which is 4h long
- The market is split into positive and negative aFRR (positive for frequency deviations below 50Hz leading to market participants have to feed into the grid - negative the other way around)
- If a market player is accepted in the capacity auction, his volume determines his minimal bidding volume on the energy market (more is always possible)
- The minimal bid size is 1MW
- The market is pay-as-bid meaning that each accepted market participants will be receiving their own bidding price
2. Energy Market:
- Each day is split into 15-minute intervals, bids can be adjusted until 25 minutes before delivery start
- Bids contain a volume (in MW) and a price for which the market participant is willing to be activated
- Similarly to the capacity market, the market is split into positive and negative aFRR
- Grid operators decide on a four second period on their demand and the corresponding marginal price such that the demand can be met as cheap as possible
- The minimal bid size is 1MW
- The market is pay-as-clear meaning that activated market participants will receive the marginal price independent of their bidding price
In our analysis, we can only offer insights on the capacity market so far (we are working on adding the energy market).
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