Access to the aFRR market via ACC
Directly connected to TenneT via Equigy — without building your own IT platform. We provide the infrastructure. As a BSP, you retain full control over your bidding strategy.
The technical link between your assets and TenneT
ACC acts as the IT carrier between assets and the aFRR market.
What is aFRR?
aFRR (automatic Frequency Restoration Reserve) is part of TenneT Ancillary Services and is used by TenneT to stabilise the grid frequency at 50 Hz.
- Part of the secondary reserve, which is activated after the FCR (the primary reserve).
- Activation happens automatically in real-time
- Works with two types of bids: capacity bids and energy bids
Capacity & energy — how it works
Capacity bids
- Available power (MW), upward and/or downward capacity
- Bidding per 15 minutes
- Contracting in advance (day-ahead)
- Remuneration even without activation
- Pay-as-bid
Energy bids
- Price per MWh, upward and/or downward activation
- 4-hour blocks
- Activation by TenneT in real time
- Remuneration upon activation
- Pay-as-cleared
The graph below shows a fictional day with downward activation. The available active power is shown as a typical solar profile with a peak power of 3 MW.
Want to know more about asset activation and the reference signal? Read our aFRR Manual for EMS Providers.
View documentationOne platform for your aFRR operation
The bidding and pool strategy remains entirely with the BSP. ACC handles the underlying infrastructure and execution, so that the operation runs automatically after configuration and bidding.
What you do as a BSP
Asset pool configuration
- Group and prioritise assets
- Set disaggregation strategy
Bidding
- Capacity and energy bids
- Manual or automatic
What ACC handles
Activation
- Automatic control based on TenneT signal
- Near real-time processing (4s)
Settlement
- End-of-day reports to TenneT
- Processing of activation and measurement data
Benefits
- Virtually no backend development required
- ACC processes updates from TenneT and CBP, keeping the service always up to date
- Scalability to aFRR within the EU is possible
Automatic bidding for renewables
For wind and solar assets, the service supports automatic bidding strategies, based on:
- Forecasts
- Configurable margins
- Flexible price logic
Who is this relevant for?
For parties that are active or want to become active on the aFRR market:
New BSPs
ACC supports onboarding and prequalification of assets.
Expanding to aFRR
BSPs looking to expand from FCR or other markets.
Scaling up
BSPs that want to add more assets or higher volumes.
Entrants to Dutch aFRR
Foreign BSPs that want to become active on the Dutch aFRR market.
From start to go-live
Initial setup
4–6 months
- Prequalification
- Integration with ACC
- Testing with TenneT
Adding new assets
2–14 weeks
Depending on the asset type and the integration required.
More details
Pricing
ACC uses a transparent pricing model with no profit sharing. Costs are directly linked to the power bid — less deployment means lower costs, and as you scale up the price per MW decreases.
Implementation fee
From ~€40k
Depending on complexity
- Environment setup
- Integration with assets and systems
- Support during onboarding and prequalification
Platform fee
€2.400 – €6.800
Per month, based on power bid (MWp)
| Power | Monthly price |
|---|---|
| < 5 MW | € 2.400 |
| 5–10 MW | € 3.000 |
| 10–25 MW | € 3.600 |
| 25–50 MW | € 4.500 |
| 50–100 MW | € 5.500 |
| > 100 MW | € 6.800 |
Contract duration: 24 months
Prequalification: Support included within scope
aFRR documentation
Overview of the ACC aFRR service architecture and connection with TenneT and Equigy
Explanation of the various functionalities of the ACC aFRR service
aFRR Manual for EMS Providers
PDF document — opens in new tab
The full API specification is available in the sandbox environment. View the API documentation →
Want to know more?
Do you want to deploy your assets on the aFRR market without developing your own IT platform? We would be happy to show you how this works in your situation.