Overview of revenue streams available to battery storage in the Spanish market
Available Markets
In Spain, battery storage assets can participate in the following revenue streams:
Energy Markets
| Market | Granularity | Description |
|---|---|---|
| Day-ahead | 15-minute | Main wholesale market cleared day before delivery |
| Intraday Auctions and Continuous Market | 15-minute | Continuous trading up to 5 minutes before delivery |
Ancillary Services
| Service | Product Duration | Procurement | Description |
|---|---|---|---|
| aFRR Capacity | 4-hour blocks | Day-ahead | Secondary frequency control capacity reservation |
| aFRR Energy | 15-minute | Real-time | Energy payments for activated aFRR |
Note: Unlike Germany, Spain does not have a Frequency Containment Reserve (FCR) market for battery storage participation.
Day-ahead Market
The day-ahead market is the primary wholesale market where most energy is traded. Key characteristics:
- 15-minute granularity – finer resolution than hourly markets in other countries
- Single clearing – market clears once per day for all delivery periods
- Pay-as-cleared – all accepted bids receive the marginal clearing price
Batteries participate by offering to charge during low-price periods and discharge during high-price periods, capturing the spread.
Intraday Market
The intraday market allows participants to adjust positions after the day-ahead market closes:
- Continuous trading – trades executed as matched, not in discrete auctions
- Gate closure – 5 minutes before delivery (one of Europe’s shortest)
- Price volatility – prices can deviate significantly from day-ahead as forecasts update
This market is increasingly important for batteries as renewable forecast errors create trading opportunities close to real-time.
Frequency Response Services
Automatic Frequency Restoration Reserve (aFRR)
aFRR is secondary frequency control that restores frequency after primary response activation:
- Asymmetric products – separate positive (upward) and negative (downward) capacity
- 4-hour blocks – capacity contracted day-ahead
- Pay-as-bid – capacity payments at bid price
- Full activation time – 5 minutes
- Minimum bid – 1 MW
aFRR Energy Activation
When aFRR capacity is called upon, energy payments are made separately:
- 15-minute granularity – energy settled at quarter-hour resolution
- Pay-as-cleared – through the PICASSO platform
- Real-time procurement – activated based on system needs
Related Pages
- Dispatch Model – How the model optimizes across these revenue streams
- Capacity Expansion Model – Projected BESS buildout in Europe