Grid congestion

A grid operator is legally required to connect everyone and to transport their electricity. In more and more places it can no longer do that. There is too little room on the network to serve every request at once, and building new substations and cables takes years. That is grid congestion.

When an area is full, the grid operator investigates and registers it as a congestion area. From that moment new requests for extra capacity go onto a waiting list. In one area that applies to consumption, in another to feed-in, and sometimes to both. Order of service is still largely order of arrival. A framework is coming that will decide who gets priority. In April 2026 one grid operator announced that from 1 July 2026 it stops reserving capacity for growth on small connections, with its prioritisation framework following on 1 January 2027.

For the business on that waiting list this is not a technical detail. It cannot expand, it cannot electrify and it cannot charge its vans. The way out runs through storage, smart control, a flexible contract or sharing capacity with the neighbours. That last one is now happening for real: in late 2025 a grid operator signed the first group transport contract on an existing business park, where twelve companies share what is available, because the network in that region is full until roughly 2035.

A construction project stalls without a connection too. An estate, a school or a warehouse that cannot be connected slips or gets redrawn, with lower energy demand or on-site generation as a requirement. That changes the programme and sometimes the specification, and therefore who supplies it. Grid congestion is not only an energy problem, it is a construction problem with an energy cause.

Grid congestion is one of the few constraints with a public register of its own. Modou reads the national capacity map and the congestion areas grid operators publish, plus their news items and connection conditions. On top of that the constraint recurs in the notices, tenders and council papers Modou goes through every working day.

Congestion areas and congestion reports from grid operators

Why that is a reason to callThese state per area whether there is still room for consumption or feed-in, and when the operator expects it to be solved. An area turning red is a list of businesses with a problem today.

The national capacity map

Why that is a reason to callPer postcode area you can see what is still available. A customer in the red cannot get their expansion connected and is looking for another route.

Grid operator news items and connection conditions

Why that is a reason to callThis is where reservation stops, waiting lists and priority rules get announced, usually months before they take effect. That is your head start.

Tenders for storage, energy management and grid reinforcement

Why that is a reason to callA tender tells you what a client wants to solve, with what budget, and by which date they decide.

Council and executive papers on business parks and energy

Why that is a reason to callThis is where municipalities discuss which parks are stuck and what money they are freeing up. It happens before there is a contract.