Is it possible to aggregate small resources into a group for providing ancillary services? If so, how does such a prequalification work?

Yes, prequalification can take place per unit or group. If many small resources are aggregated into one group, the entire group is prequalified to ensure that the group fulfils the technical requirements. Units that are aggregated into a group need to have the same balance responsible party and be in the same bidding area.

For FCR, it is possible to type qualify aggregates of small units. For more information about type qualification, see the Prequalification page.

An aggregator, not themselves responsible for balancing, can currently participate in the ancillary service markets with resources as a subcontractor to a balance responsible party. It is the balance responsible party with whom Svenska kraftnät has an agreement and who is responsible for prequalification.

Once the balance responsibility role is divided into BSP (balancing service provider) and BRP (balance responsible party), an aggregator will be able to participate on the ancillary services market in the role as BSP.