How does congestion management work, step by step?
- Identification of a congestion area: The grid operator determines that a portion of its grid is structurally or periodically overloaded.
- Recruiting flexible participants: The grid operator contacts companies in the area and asks if they are willing to provide flexibility.
- Contract terms: A flexible contract will be drawn up specifying: how much power you can reduce (kW), how quickly you can do so (activation time), how long you can maintain that reduction (duration), and what compensation you will receive.
- Activation: The grid operator sends a signal (sometimes a day in advance, sometimes in real time via an automated interface) when it needs flexibility.
- Operation: Your EMS receives the signal and automatically instructs the battery to absorb the power generation or reduce consumption.
- Compensation: After activation, you will receive compensation based on the volume supplied (€/kWh or €/kW).
What types of reimbursements are available?
| Program type | Administrator | Activation time | Typical compensation | Is it battery-powered? |
|---|---|---|---|---|
| Local Congestion Management (LCM) | Regional grid operator | 15 min – 1 day | €5–€40 per MWh | Yes |
| FCR (Frequency Containment Reserve) | TenneT | <30 seconden | €2–€15 per MWh of availability | Ideal (automatic) |
| aFRR (Automatic Frequency Restoration) | TenneT | <5 minuten | €1–€8 per MWh + activation fee | Yes |
| mFRR (Manual Frequency Restoration) | TenneT | 7–15 minutes | €1–€5 per MWh + activation fee | Limited (too slow for small batteries) |
How much extra income can your battery generate?
Revenue from congestion management depends heavily on the location (how prone to congestion your region is), the program type, and the available battery capacity. As a general guide:
| Battery size | Congestion management annual revenue (estimate) | FCR market revenue (estimate) |
|---|---|---|
| 100 kWh / 100 kW | €3,000–€8,000 | €1,500–€5,000 |
| 250 kWh / 250 kW | €7,500–€20,000 | €3,500–€12,000 |
| 500 kWh / 500 kW | €15,000–€40,000 | €7,000–€25,000 |
This represents additional revenue on top of the direct savings from peak shaving, self-consumption, and arbitrage.
How does Boltainer combine congestion management with its own consumption optimization?
The smart prioritization feature in the Boltainer EMS works as follows:
- Priority 1 — Emergency Power: Always maintain a minimum charge level for emergency power (if configured).
- Priority 2 — Peak shaving: The peak limit for self-consumption is never negotiable—this protects your capacity costs.
- Priority 3 — Congestion Management: If there is an active congestion signal, this takes precedence over or is equivalent to arbitrage.
- Priority 4 — Energy arbitrage: remaining capacity is used for arbitrage based on day-ahead prices.
- Priority 5 — Solar buffer: Reserve capacity for expected solar generation based on weather data.
How do you get started with congestion management?
- Check whether your location is in an active congestion zone (network operator website).
- Please contact your regional grid operator to learn about available congestion management programs.
- Connect via Boltainer to a certified aggregator to gain access to TenneT balancing markets.
- Configure the EMS for automatic enrollment—no manual intervention required.
- Receive monthly reports on actual congestion management revenue.
Frequently Asked Questions About Congestion Management
What is congestion management in a nutshell?
Congestion management involves reducing or adjusting your energy consumption in exchange for compensation at the request of the grid operator when the grid in your area is at risk of becoming overloaded.
Exactly how much revenue does congestion management generate?
That depends heavily on the region, the program, and the year. In areas with heavy congestion and when participating in the FCR market, annual earnings of €10,000–€40,000 are achievable for a 250–500 kWh system. In less congested areas, earnings are lower.
As a business, will I notice any impact from congestion management measures?
No. The Boltainer EMS handles everything automatically. The battery absorbs the demand for flexibility without the business process noticing—provided the battery is sufficiently charged and the activation falls within the configured limits.