Wattlas. The atlas of Europe's grid.

Netherlands > Zuid-Holland

Zuid-Holland grid status

Stedin reports that almost the whole province is full for off-take, with a short list of exceptions including the Maasvlakte, Alblasserdam and the Naaldwijk area. The constraint stacks on both the TenneT high-voltage grid and parts of Stedin's regional grid. The Rotterdam harbour is the sharpest case; its structural fix is TenneT's new 380 kV Europoort station, expected between 2032 and 2035.

Off-take: Congested Feed-in: Under watch

Commercial read

What is constrained: Off-take across almost the whole province: TenneT's high-voltage grid has reached maximum capacity across nearly all of it, and parts of Stedin's regional grid are full as well. On 1 July 2026 Stedin added station-level congestion announcements for Hellevoetsluis, Europoort and Wellebrug (25/10 kV), each stacked inside the TenneT constraint. The Rotterdam harbour remains the sharpest case.

Still worth screening: The exceptions Stedin names itself: the Maasvlakte (with TenneT's 380 kV Amaliahaven station in progress for 2027), Alblasserdam (published headroom gap of 4.7 MW, relief expected 2027) and the area around Naaldwijk. The Westland sits on Westland Infra's grid and shows published off-take headroom on the capacity map, while its feed-in side carries a 104 MW queue.

What changed: Stedin's 30 March 2026 update states a forecast Rotterdam harbour off-take shortfall of 9 MW from 2027, rising to 64 MW in 2030, expected to ease mostly through flexible contracts and changing demand. On 1 July 2026 Stedin formally announced congestion at three more harbour-side stations and named the reinforcement set: Europoort 25/10 kV, a new Hellevoetsluis 2, a new 150/25 kV Merwedeweg, and TenneT's 380 kV Simonshaven (expected 2031) next to Europoort 380 kV (expected 2032 to 2035).

What to watch: The three congestion-management studies opened 1 July 2026 (Europoort, Hellevoetsluis, Wellebrug), TenneT's 380 kV stations Simonshaven (expected 2031), Europoort (expected 2032 to 2035) and Amaliahaven (2027), and whether the harbour shortfall forecast moves again at the next recalculation.

The numbers

64MW Forecast Rotterdam harbour off-take shortfall for 2030 (Stedin, 30 March 2026)

source, as of 2026-07-04

Stations and areas

  • Province overview, off-take: Almost the whole province is full for off-take. Exceptions named by Stedin include the Maasvlakte, Alblasserdam and the area around Naaldwijk. TenneT's high-voltage grid has reached maximum capacity across nearly the whole province, and parts of Stedin's regional grid are full as well. Expected: A Stedin study projects overload from 2028 without measures. source
  • Rotterdam harbour, off-take: Stacked off-take congestion: TenneT high-voltage full since 2022, Stedin regional (Europoort and parts of Botlek) full since 31 October 2025, and station-level congestion at Europoort, Hellevoetsluis and Wellebrug (25/10 kV) formally announced 1 July 2026, each opening a congestion-management study. Expected: Structural relief with TenneT's new 380 kV Europoort station, expected in the period 2032 to 2035. source
  • Rotterdam harbour, recalculation: Stedin's 30 March 2026 update states a forecast Rotterdam harbour off-take shortfall: 9 MW from 2027, rising to 64 MW in 2030, expected to ease mostly through flexible contracts and changing demand. Expected: Double-sourced: Stedin press release (30 March 2026) and Solar Magazine (7 April 2026). source
  • Station Hellevoetsluis 25/10 kV, off-take: On 1 July 2026 Stedin announced off-take congestion for station Hellevoetsluis 25/10 kV and opened a congestion-management study. The area covers Hellevoetsluis, Westvoorne-Zuid and surrounding areas, inside the larger TenneT congestion area announced 17 November 2022 (stacked congestion). Existing waiting-list positions are unaffected. Expected: A new regional station expected between 2029 and 2030; TenneT's expansions for the Rotterdam harbour expected between 2032 and 2035. source
  • Stations Europoort 25/10 kV en Wellebrug 25/10 kV, off-take: On 1 July 2026 Stedin announced off-take congestion for stations Europoort 25/10 kV and Wellebrug 25/10 kV, covering the Rotterdam harbour, Voorne aan Zee and surrounding municipalities, stacked inside earlier Stedin (31 October 2025, 150/25 kV Europoort) and TenneT (17 November 2022) congestion. Relief per Stedin's July 2026 update: reinforcing station Europoort 25/10 kV and a new station Hellevoetsluis 2 between 2029 and 2030, a new 150/25 kV station Merwedeweg to offload the existing 150/25 kV Europoort station, plus TenneT's new 380 kV stations Simonshaven (expected 2031) and Europoort (expected 2032 to 2035). Expected: Regional reinforcements 2029 to 2030; TenneT 380 kV Simonshaven expected 2031; TenneT 380 kV Europoort expected 2032 to 2035. source
  • Maasvlakte (Yangtzekanaal service area), off-take: The Maasvlakte is one of the off-take exceptions Stedin names for this province. The official capacity map (sampled 4 July 2026) shows the Yangtzekanaal service area with an empty off-take queue and the TenneT off-take layer one step below its most constrained level, with a new TenneT 380 kV station Amaliahaven under construction for 2027. Expected: New TenneT 380 kV station Amaliahaven, 2027, in progress per the capacity map. source
  • Westland (Westerlee service area, Westland Infra), both directions: The Westland greenhouse area is served by Westland Infra, not Stedin ('In het Westland, Midden-Delfland en een deel van de Botlek zijn wij beheerder van het elektriciteits- en gasnet.'). The official capacity map (sampled 4 July 2026) lists 378 MW existing off-take capacity against 240 MW required, an empty off-take queue and no TenneT-layer constraint, while the feed-in side shows 378 MW existing against 378 MW required with a 104 MW feed-in queue. Expected: Off-take has published headroom; feed-in carries a 104 MW queue on the capacity map. source
  • Alblasserdam en Molenlanden-West (Zwarte Paard service area), off-take: Alblasserdam is one of the off-take exceptions Stedin names, and the map detail shows why it is an exception with a horizon: the official capacity map (sampled 4 July 2026) lists 26.1 MW existing against 30.8 MW required off-take capacity with a 1.7 MW queue and no TenneT-layer constraint, expected solved in 2027. Stedin's investment plan has the Zwarte Paard station expansion approved for 2027. Expected: Zwarte Paard station expansion in 2027 per the investment plan; regional congestion expected solved in 2027. source

Capacity detail per station or area

Station or area Layer Direction Available MW Needed MW Relief project Confidence Source
Province overview, off-take Both grids Off-take Not yet published Not yet published None announced high source, 2026-07-04
Rotterdam harbour, off-take Both grids Off-take Not yet published Not yet published TenneT 380 kV Europoort station, 2032 to 2035 high source, 2026-07-04
Rotterdam harbour, recalculation Both grids Off-take Not yet published Not yet published TenneT 380 kV Europoort station, 2032 to 2035 high source, 2026-07-04
Station Hellevoetsluis 25/10 kV, off-take Both grids Off-take Not yet published Not yet published New regional station Hellevoetsluis 2 (Stedin), 2029 to 2030, expected high source, 2026-07-04
Stations Europoort 25/10 kV en Wellebrug 25/10 kV, off-take Both grids Off-take Not yet published Not yet published Europoort 25/10 kV reinforcement, new 150/25 kV station Merwedeweg (Stedin); new 380 kV stations Simonshaven and Europoort (TenneT), 2029 to 2030 regional; 2031 Simonshaven; 2032 to 2035 Europoort 380 kV, all expected high source, 2026-07-04
Maasvlakte (Yangtzekanaal service area), off-take TenneT (transmission) Off-take Not yet published Not yet published New TenneT 380 kV station Amaliahaven, 2027, in progress per the capacity map high source, 2026-07-04
Westland (Westerlee service area, Westland Infra), both directions Regional (DSO) Both 378 240 None announced high source, 2026-07-04
Alblasserdam en Molenlanden-West (Zwarte Paard service area), off-take Regional (DSO) Off-take 26.1 30.8 Transformer station Zwarte Paard expansion (Stedin), 2027, per the investment plan high source, 2026-07-04

Intelligence on this region

Sources

As of 2026-07-04. All claims here are verified against the linked sources as of 4 July 2026 (see wattlas-brain/issues/issue-004-zuid-holland.md and the Run G source-lock). No feed-in figure is published province-wide, so feed-in status stays watch rather than getting a number; the Westland feed-in queue is area-level capacity-map data, not a provincial figure. Zuid-Holland is a three-DSO province: Stedin for most of it, Liander in the north (verified via the capacity map around Leiden), and Westland Infra for the Westland, Midden-Delfland and part of the Botlek, per its own site. Claims on this page apply to the named operator's grid area only.

What changed

  • July 1, 2026: Stedin announces off-take congestion at three more Rotterdam-area stations source
  • March 30, 2026: Rotterdam harbour off-take shortfall forecast: 9 MW from 2027, rising to 64 MW in 2030 source

See the full changelog

Forward internally

Forward this internally if your team is asking: is Zuid-Holland worth screening right now, which layer is constrained, and what changed last. https://wattlas.eu/netherlands/zuid-holland

Founding access

Founding access adds: source-backed updates as they emerge, priority region requests, early capacity-change updates, company-level use, priority access to future exports and snapshots.

Want Wattlas to track this region for your team?

Request founding access

Get the next Issue as it publishes