In 2023/24, we contracted 706 MW of Flexibility Services: dispatched 554 MWh and spent £275k.
If you own, operate, manage or supply generation, storage or demand assets over 10kW in any of the advertised zones you may be able to provide flexibility services.
How to Take Part in Flexibility
The first time you participate there are several steps that you need to take.
To participate in Flexibility Services with SSEN, you will follow our standard process that takes place on our Market Platform, ElectronConnect. This starts with registration and prequalification. A copy of the “Flexibility Service Pre-Qualification Standard Template” will be available on ElectronConnect and can also be found under “Service Documentation” in
Once you are pre-qualified, you can move on to the contracting process. We have specific time periods where there is an opportunity for you to the Terms and Conditions of the Overarching Agreement. This is run in the Electron Connect platform. At the end of the time period, submissions are reviewed and approved Providers are sent an overarching agreement for signature. Signing the overarching agreement allows you to participate in future biddings windows. The opportunity to participate occur several times a year, so keep an eye out for announcements.
Before the bidding window opens, you'll prepare by declaring which of your assets are located in areas where we are seeking flexibility, as announced in advance. We conduct long term bidding windows 2-3 times a year, for needs >3-months in advance, as well as monthly short term bidding windows for upcoming needs in <3-months.
If your bids for flexibility are successful, you will be notified of availability needs at the period of time specified by the service type (either month ahead, week ahead or day ahead).
Upcoming Bidding Rounds
Long-Term, > 3-months Ahead
Variable Availability + Operational Utilisation (VAOU) Monday 19th May 2025 09:00 – Monday 06th June 2025 11:00”
Scheduled Utilisation (SU): Monday 19th May 2025 09:00 – Monday 06th June 2025 11:00
Upcoming Opportunities to Become a Flexibility Provider
We’re pleased to announce that we will be running a new opportunity to be awarded an Overarching Agreements in April 2025. This will open on Monday 7th April 11:00 and close on Wednesday 23rd 17:00.
Only Providers that have pre-qualified by submitting prequalification questions (PQQ) and have been informed that they have pre-qualified will be invited to participate in the contracting opportunity.
If you are interested in becoming a Flexibility Service Provider, you can get started now by pre-qualifying. To pre-qualify, you will find a copy of the “Flexibility Service Pre-Qualification Standard Template” on our market platform, ElectronConnect.
Signing the overarching agreement will give Flexibility Service Providers the opportunity to participate in our upcoming long-term and season-ahead bidding rounds in May 25.
Pre-qualifying documentation can also be found under “Service Documentation” in our document library:
Flexibility Services Document Library
Flexibility Services Webinar October 4th 2024
Participating in Flexibility with SSEN
SSEN has long served diverse geographic areas, and this experience means we’ve always innovated when it comes to managing the supply and demand of electricity.
We continue to make progress in building our flexibility markets, having procured over 700 MW since the beginning of ED2. We have also signed up a total of 12 providers to the latest version of the overarching agreement, ready to bid in our markets.
To maximise market participation, we have done the following over the past year:
- Reduced minimum DER (Distributed Energy Resources) size to 10 kW
- Trialed Guaranteed revenue for some Variable Availability services
- Improved Bid Pricing Form
- Implemented Overarching Agreements
Document Library
Access our document library for service documents, reports, and procurement-related information.

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