Europe does not only need more renewable generation. It also needs a practical way to connect generators, consumers and storage without waiting for every planned cable and substation to be rebuilt. The European Commission reports that grid-connection queues were present in at least 16 EU countries by mid-2026. Around 120 GW of mature renewable projects, including approximately 1.5 million household installations, could face delayed access by 2030.
The queue is not a single technical problem. Applications may arrive before projects are mature, information about available capacity can be incomplete and networks are often planned more slowly than generation or new electrical loads. A connection request can therefore be commercially important even when the network cannot offer unrestricted capacity at every hour of the year.
Flexible connection does not mean an unreliable system
A flexible or non-firm connection allows an operator to limit generation or consumption during defined network conditions. In return, a project may connect earlier than it could under a conventional agreement. The arrangement only makes sense when the battery, inverter and energy-management system can respond predictably to the agreed limits.
For a site with photovoltaics, the control sequence can combine several actions: reduce export, charge an electrical battery, shift a controllable load or store useful heat. These measures do not create additional cable capacity, but they can keep the connection within its permitted operating envelope. The Commission specifically identifies flexible connection agreements and hybrid energy systems as tools for addressing congestion and accelerating renewable integration.
Storage changes the shape of a connection request
A generator without storage tends to request capacity when production is highest. A battery can absorb part of that peak and release energy later. Thermal storage can do the same for electricity whose final purpose is hot water, space heating or process heat. The result is a smoother import and export profile, provided the equipment is sized from real measurements rather than optimistic annual totals.
This makes charging power as important as energy capacity. A large battery with a small inverter may be unable to absorb a short solar peak. A powerful battery with insufficient usable energy may fill too quickly. Control latency, minimum state of charge, forecast accuracy and the priority given to thermal loads all affect the connection profile.
Questions to settle before equipment selection
- What import and export limits apply at the connection point?
- Can the operator curtail generation, consumption or both?
- How quickly must the controller respond?
- Which loads can move in time without affecting the user?
- How much surplus should remain electricity and how much can become stored heat?
- What happens when communications or forecasting fail?
A flexible connection is not a substitute for network investment, but it can make existing infrastructure more useful. For buyers, it reinforces a central WodaTherm principle: compare the complete storage-and-control system, not only the nominal capacity printed on one product.
Primary source: European Commission — European Grids Package · source language: English · published: 2026-07-17. This is an original WodaTherm™ briefing, not a copy of the source publication.