A temporary transformer planned for Rotterdam's Europoort area could give some businesses grid capacity years before permanent network expansions are finished. For companies waiting to electrify equipment or expand operations, it offers a possible earlier route to a connection. It does not yet say how much capacity any customer will receive.
Dutch grid operators TenneT and Stedin plan to install the 500-megawatt transformer at the site of a new 380-kilovolt substation, according to TenneT's announcement. The earliest expected commissioning date is late 2028, provided permits are granted and the necessary cable connections are built. Permanent stations and connections are expected from 2032 onward.
TenneT's Port Grid Has Been at Capacity Since 2022
According to Stedin, TenneT's high-voltage grid serving the port area reached its capacity limit in 2022. Stedin's own regional grid in Europoort and parts of Botlek has been full for additional consumption since October 31, 2025. Businesses seeking new or larger connections join waiting lists. Nationally, Dutch queues now run to tens of gigawatts.
Rotterdam's shore power strategy names grid congestion as a complication for connections that let ships use electricity at berth. The port has more than 100 shore power installations totaling over 43 MW. An EU regulation requires major ports to supply shore power from January 2030. How much of the new capacity would serve future projects is unstated.
The temporary unit would use a planned connection between Europoort's existing 150-kilovolt station and the new 380-kilovolt station. TenneT says it examined other measures and chose this one as faster and higher-impact, because the alternatives needed longer new connections.
The 500 MW Rating Is Not a Customer Allocation
The rating does not mean 500 MW is available at once to projects on the waiting list. Some capacity must support grid safety and supply to existing connections, though the operators expect most of it to reach waiting customers. The amount also depends on existing customers' forecast use and on progress with other grid expansions. No recipients have been named, and no allocation figure has been published.
TenneT's updated calculations this year put the port region's projected 2030 transport shortfall at 64 MW, down from 244 MW forecast in October 2025, and the operator still wants company flexibility to cut peaks. The figure measures forecast peak overload, not the waiting list, so it does not offset the 500 MW.
TenneT expects first insights into the effect on its high-voltage grid by the end of 2026. Stedin can then work out which customers qualify, and says it will contact waiting-list customers in early 2027. Until then, companies cannot treat the announcement as a confirmed connection date in an investment schedule.
Full Waiting-List Relief Waits for the 2032 Europoort Station
The interim measure leaves work for the years before commissioning. The New Energy Taskforce, which includes TenneT, Stedin, the Port of Rotterdam Authority and Deltalinqs, is pursuing flexible demand and better use of the existing grid. Facilities teams in other tight markets already build that flexibility into project plans, and storage at congested industrial substations is another option. TenneT says the full waiting list can be served only once the Europoort 380-kilovolt station runs, which it expects in 2032.
For port operators, the practical change is a potentially earlier connection window, subject to network studies, permits and construction. The decision point comes when the operators establish usable capacity and customer eligibility, with first results due by the end of 2026. Only then will it be clear which expansion and electrification projects can move before the permanent grid is ready.
