What is changing?
The way in which you receive an activation remains unchanged. However, an activation may be received earlier.
- You will receive a regular activation, as is currently the case, no later than D-1 (the day before execution) before 07:00.
- You will receive a Cross Operator activation from TenneT on D-2 (two days before execution) before 23:59.
The further execution of the contract, the exchange of messages and the financial settlement remain unchanged.
Possible scenarios
From 1 November 2026, as a CSP or connected party, you may encounter four scenarios:
- You do not receive an activation.
- You only receive a Cross Operator activation from TenneT on D-2.
- You only receive a regular activation from your own grid operator on D-1.
- You first receive a Cross Operator activation from TenneT on D-2, followed by a new activation from your own grid operator on D-1.
The fourth scenario in particular requires attention.
Two activations? The latest message contains the complete instruction
After a Cross Operator activation from TenneT, your own system operator checks whether its grid area needs additional flexibility.
- No additional flexibility needed? You will receive no new message, and TenneT’s activation remains valid.
- Additional flexibility needed? Your own system operator will send a new activation no later than the day before delivery (D-1), before 07:00. This will also include TenneT’s earlier activation.
Accept both messages and follow only the latest one. This message contains the complete activation instruction for that delivery day: TenneT’s request and your own system operator’s additional request. You do not need to combine the messages yourself.
Example: two messages for the same delivery day
Two days before delivery, you receive an activation from TenneT:
- From 10:00 to 12:00: a 5 MW restriction.
The day before delivery, you receive a new activation from your own system operator. It includes both time periods:
- From 10:00 to 12:00: a 5 MW restriction.
- From 13:00 to 15:00: a 3 MW restriction.
You accept both messages and follow the latest one. By doing so, you also comply with TenneT’s activation.
Do you receive two activations?
When TenneT issues an activation on D-2, your own grid operator will subsequently check whether additional flexibility is required in its own congestion area.
- Is the existing activation sufficient? Then no new message will be sent, and the D-2 activation remains valid.
- Is additional flexibility required? Then your own grid operator will send a new updates activation no later than D-1 before 07:00.
Always follow the most recently received message. The new updated message contains the sum of the requested flexible power. Therefore it replaces the previous activation for that day.
What is not changing?
- The contractual terms and conditions remain applicable, including in the event of a Cross Operator activation.
- The executing system operator will take the contractual agreements into account, such as time windows and minimum and maximum transport capacities.
- The financial settlement will continue to be handled through your own grid operator. Nothing changes in this regard.
Questions?
Do you have any questions about this change, or would you like to know what it means for your contract? Please contact your grid operator.
