There will be a period of planned downtime on the BSC Central Systems from 20:30 (BST) on Wednesday 4 June to 00:15 (BST) on Thursday 5 June 2025.

The outage is required for infrastructure maintenance on the BSC Central Systems including the Energy Contract Volume Aggregation Agent (ECVAA), Central Data Collection Agent (CDCA) and Central Registration Agent (CRA).

How will I be affected?

Communication Network:

FTP access for market participants via Low-Grade and High-Grade networks to the Participant FTP Server will be unavailable and it will not be possible to submit or receive any files via FTP during this window.

National Energy System Operator (NESO) submission of BM, BSAD and MODIS file data (which is sent to a different FTP server) will not be impacted.

Elexon Portal:

The Elexon Portal will be accessible throughout the planned downtime.

ECVAA:

The ECVAA and ECVAA Web Service (EWS) will be impacted by the planned downtime. Energy Contract Volume Notifications (ECVN) and Metered Volume Reallocation Notifications (MVRN) to ECVAA will be blocked and the ECVAA Credit Cover Percentage check will also be suspended.

Following completion of the outage, the ECVAA Credit Cover Percentage check will be enabled and submission of ECVNs and MVRNs will be processed as normal.

What will I need to do?
You will need to arrange to submit any notifications, ECVNs or MVRNs before the start of the planned outage. Please do this as early as possible to reduce the risk of missing the Submission Deadline.

Will I receive ECVAA reports as normal?
No, the ECVAA Forward Contract Report, scheduled to run at 22:00 (BST) will be suspended. The report will instead be run after the planned downtime.

Do I need to take any further action?
A real-time status update is available via the Service Status webpage.

For more information, please contact us via Elexon Support.